1
|
Luo H, Cheng J, Zhang Z, Zhang Y, Wang X, Hu R, Li J, Guo Y, Luo Q. Seasonal patterns in Chinese population: Validating the seasonal pattern assessment questionnaire and exploring associations with psychiatric diagnoses and biological rhythms. Chronobiol Int 2024; 41:609-620. [PMID: 38644696 DOI: 10.1080/07420528.2024.2337875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 03/27/2024] [Indexed: 04/23/2024]
Abstract
Seasonal patterns (SP) exert a notable influence on the course and prognosis of patients with affective disorders, serving as a specifier in diagnosis. However, there is limited exploration of seasonality among psychotic patients, and the distinctions in seasonality among psychiatric patients remain unclear. In this study, we enrolled 198 psychiatric patients with anxiety and depressive disorders (A&D), bipolar disorder (BD), and schizophrenia (SZ), as well as healthy college students. Online questionnaires, including the Seasonal Pattern Assessment Questionnaire (SPAQ) for seasonality, the Morningness and Eveningness Questionnaire-5 (MEQ-5) for chronotypes, and the Pittsburgh Sleep Quality Index (PSQI), were administered. The validity and reliability of the Chinese version of the SPAQ were thoroughly analyzed, revealing a Cronbach's alpha of 0.896 with a two-factor structure. Results indicated that higher seasonality was correlated with poorer sleep quality and a more delayed chronotype (p < 0.05). Significant monthly variations were particularly evident in BD, specifically in mood, appetite, weight, social activities, and sleep dimensions (p < 0.001). In summary, the Chinese version of SPAQ is validated, demonstrating moderate correlations between seasonality, chronotype, and sleep quality. BD patients exhibited the strongest seasonality, while mood disorder patients displayed more delayed chronotypes than SZ.
Collapse
Affiliation(s)
- Huirong Luo
- Department of Psychiatry, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Juan Cheng
- Department of Psychiatry, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Psychiatry, Nanchuan Hospital of Chongqing Medical University, Chongqing, China
| | - Zheng Zhang
- Department of Psychiatry, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yinlin Zhang
- Department of Psychiatry, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Department of Children and Adolescents, Chongqing Mental Health Center, Chongqing, China
| | - Xueqian Wang
- Department of Psychiatry, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- School of Psychology, Army Military Medical University, Chongqing, China
| | - Renqin Hu
- Department of Psychiatry, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Junyao Li
- Department of Psychiatry, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yanwei Guo
- Department of Psychiatry, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qinghua Luo
- Department of Psychiatry, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| |
Collapse
|
2
|
Yoon J, Yu H, Jang Y, Lee D, Park YS, Ihm HK, Ryoo HA, Cho N, Lee J, Kim Y, Park J, Kang HS, Ha TH, Myung W. Validation of the Short Form of the Mood Instability Questionnaire-Trait (MIQ-T-SF) in the Korean General Population. Psychiatry Investig 2023; 20:408-417. [PMID: 37253466 DOI: 10.30773/pi.2022.0275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 01/30/2023] [Indexed: 06/01/2023] Open
Abstract
OBJECTIVE Mood instability (MI) is a clinically significant trait associated with psychiatric disorders. However, there are no concise measurements to evaluate MI. The initial Mood Instability Questionnaire-Trait (MIQ-T) was developed to fill this gap. The current study aimed to create a short form of MIQ-T (MIQ-T-SF) that measures MI with high validity and reliability in the Korean general population. METHODS Of the 59 items in the MIQ-T, 17 items were chosen for the MIQ-T-SF following the factor analysis process. In total, 540 participants completed the MIQ-T-SF. Cronbach's alpha and McDonald's omega were used to evaluate reliability. Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were used to determine construct validity. Concurrent validity was confirmed via comparisons with Personality Assessment Inventory-Borderline Features Scale. Measurement invariance across gender and age groups was confirmed before analyzing differences in scores using Kruskal-Wallis test. RESULTS The MIQ-T-SF displayed expected correlations and high internal consistency (α=0.71-0.90, Ωt=0.72-0.92). Using EFA and CFA, a five-factor structure was confirmed. Measurement invariance was supported, and gender differences were observed. CONCLUSION The MIQ-T-SF is an accurate and reliable method to detect MI in the Korean general population. The study's results offer new perspectives for future studies on MI.
Collapse
Affiliation(s)
- Joohyun Yoon
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Hyeona Yu
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Yoonjeong Jang
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Daseul Lee
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Yun Seong Park
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Hong Kyu Ihm
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Hyun A Ryoo
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Nayoung Cho
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Jakyung Lee
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Yeoju Kim
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Jungkyu Park
- Department of Psychology, Kyungpook National University, Daegu, Republic of Korea
| | - Hyo Shin Kang
- Department of Psychology, Kyungpook National University, Daegu, Republic of Korea
| | - Tae Hyon Ha
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Woojae Myung
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| |
Collapse
|
3
|
Development and Validation of the Mood Instability Questionnaire-Trait (MIQ-T). ACTA ACUST UNITED AC 2021; 57:medicina57080838. [PMID: 34441044 PMCID: PMC8399587 DOI: 10.3390/medicina57080838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/12/2021] [Accepted: 08/15/2021] [Indexed: 11/18/2022]
Abstract
Background and objectives: Mood instability (MI) is a stable trait associated with psychiatric disorders, yet there is a lack of tools to measure MI. The purpose of this study was to develop and validate the Mood Instability Questionnaire-Trait (MIQ-T) to evaluate MI in mood disorder patients. Material and methods: Items were taken from various established questionnaires to create an initial list of MIQ-T questions. Data from 309 psychiatric patients (n = 309; 62 major depressive disorder, 58 bipolar I disorder, and 189 bipolar II disorder) were gathered from their medical records and were utilized in an exploratory factor analysis to clarify the underlying components of MI. Then, anonymous survey data from 288 individuals from the general population were included in the analysis as a comparison group. Associations between MIQ-T and other previously validated clinical instruments for mood disorders were examined to test external validity. Results: The exploratory factor analysis demonstrated that the five-factor structure (Lability, Upward Tendency, Downward Tendency, Childhood Instability, and Seasonality) of 59 items was the most appropriate with clear, cohesive features. MIQ-T exhibited high internal consistency (α = 0.96) and moderate to strong correlations with other previously validated clinical instruments, which were consistent with theoretical predictions, providing evidence of criterion validity. Short forms were also created to address the high internal consistency value, which can indicate redundancy, and to increase the approachability of the measure. We found that the patients with bipolar II disorder had higher MIQ-T scores than the patients with bipolar I disorder or major depressive disorder and the comparison group. Conclusion: Together, these findings validate the newly developed MIQ-T as an instrument of mood instability. MIQ-T can be a potential research tool for mood disorder.
Collapse
|
4
|
Yeom JW, Cho CH, Jeon S, Seo JY, Son S, Ahn YM, Kim SJ, Ha TH, Cha B, Moon E, Park DY, Baek JH, Kang HJ, An H, Lee HJ. Bipolar II disorder has the highest prevalence of seasonal affective disorder in early-onset mood disorders: Results from a prospective observational cohort study. Depress Anxiety 2021; 38:661-670. [PMID: 33818866 DOI: 10.1002/da.23153] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 02/18/2021] [Accepted: 03/16/2021] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Many mood disorder patients experience seasonal changes in varying degrees. Studies on seasonality have shown that bipolar disorder has a higher prevalence rate in such patients; however, there is limited research on seasonality in early-onset mood disorder patients. This study estimated the prevalence of seasonality in early-onset mood disorder patients, and examined the association between seasonality and mood disorders. METHODS Early-onset mood disorder patients (n = 378; 138 major depressive disorder; 101 bipolar I disorder; 139 bipolar II disorder) of the Mood Disorder Cohort Research Consortium and healthy control subjects (n = 235) were assessed for seasonality with Seasonality Pattern Assessment Questionnaire (SPAQ). RESULTS A higher global seasonality score, an overall seasonal impairment score, and the prevalence of seasonal affective disorder (SAD) and subsyndromal SAD showed that mood disorder subjects had higher seasonality than the healthy subjects. The former subject group had a significantly higher mean overall seasonal impairment score than the healthy subjects (p < .001); in particular, bipolar II disorder subjects had the highest prevalence of SAD, and the diagnosis of bipolar II disorder had significantly higher odds ratios for SAD when compared to major depression and bipolar I disorder (p < .05). CONCLUSIONS Early-onset mood disorders, especially bipolar II disorder, were associated with high seasonality. A thorough assessment of seasonality in early-onset mood disorders may be warranted for more personalized treatment and proactive prevention of mood episodes.
Collapse
Affiliation(s)
- Ji Won Yeom
- Department of Psychiatry, Biomedical Science, Korea University College of Medicine, Seoul, Republic of Korea
| | - Chul-Hyun Cho
- Chronobiology Institute, Korea University, Seoul, Republic of Korea.,Department of Psychiatry, School of Medicine, Chungnam National University, Daejeon, Republic of Korea.,Department of Psychiatry, Chungnam National University Sejong Hospital, Sejong, Republic of Korea
| | - Sehyun Jeon
- Department of Psychiatry, Biomedical Science, Korea University College of Medicine, Seoul, Republic of Korea.,Chronobiology Institute, Korea University, Seoul, Republic of Korea
| | - Ju Yeon Seo
- Department of Psychiatry, Biomedical Science, Korea University College of Medicine, Seoul, Republic of Korea.,Chronobiology Institute, Korea University, Seoul, Republic of Korea
| | - Serhim Son
- Department of Biostatistics, Korea University College of Medicine, Seoul, Republic of Korea
| | - Yong-Min Ahn
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Se Joo Kim
- Department of Psychiatry and Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Tae Hyon Ha
- Department of Psychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Boseok Cha
- Department of Psychiatry, Gyeongsang National University College of Medicine, Jinju, Republic of Korea
| | - Eunsoo Moon
- Department of Psychiatry, Pusan National University School of Medicine, Busan, Republic of Korea
| | - Dong Yeon Park
- Department of Psychiatry, National Center for Mental Health, Seoul, Republic of Korea
| | - Ji Hyun Baek
- Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Hee-Ju Kang
- Department of Psychiatry, Chonnam National University College of Medicine, Gwangju, Republic of Korea
| | - Hyonggin An
- Department of Biostatistics, Korea University College of Medicine, Seoul, Republic of Korea
| | - Heon-Jeong Lee
- Department of Psychiatry, Biomedical Science, Korea University College of Medicine, Seoul, Republic of Korea.,Chronobiology Institute, Korea University, Seoul, Republic of Korea
| |
Collapse
|
5
|
Yang SY, Hong KS, Cho Y, Cho EY, Choi Y, Kim Y, Park T, Ha K, Baek JH. Association between the Arylalkylamine N-Acetyltransferase (AANAT) Gene and Seasonality in Patients with Bipolar Disorder. Psychiatry Investig 2021; 18:453-462. [PMID: 33993688 PMCID: PMC8169335 DOI: 10.30773/pi.2020.0436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 03/04/2021] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE Bipolar disorder (BD) is complex genetic disorder. Therefore, approaches using clinical phenotypes such as biological rhythm disruption could be an alternative. In this study, we explored the relationship between melatonin pathway genes with circadian and seasonal rhythms of BD. METHODS We recruited clinically stable patients with BD (n=324). We measured the seasonal variation of mood and behavior (seasonality), and circadian preference, on a lifetime basis. We analyzed 34 variants in four genes (MTNR1a, MTNR1b, AANAT, ASMT) involved in the melatonin pathway. RESULTS Four variants were nominally associated with seasonality and circadian preference. After multiple test corrections, the rs116879618 in AANAT remained significantly associated with seasonality (corrected p=0.0151). When analyzing additional variants of AANAT through imputation, the rs117849139, rs77121614 and rs28936679 (corrected p=0.0086, 0.0154, and 0.0092) also showed a significant association with seasonality. CONCLUSION This is the first study reporting the relationship between variants of AANAT and seasonality in patients with BD. Since AANAT controls the level of melatonin production in accordance with light and darkness, this study suggests that melatonin may be involved in the pathogenesis of BD, which frequently shows a seasonality of behaviors and symptom manifestations.
Collapse
Affiliation(s)
- So Yung Yang
- Department of Psychiatry, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea.,Institute of Behavioral and Science in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Kyung Sue Hong
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Republic of Korea.,Center for Clinical Research, Samsung Biomedical Research Institute, Seoul, Republic of Korea
| | - Youngah Cho
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Republic of Korea
| | - Eun-Young Cho
- Center for Clinical Research, Samsung Biomedical Research Institute, Seoul, Republic of Korea
| | - Yujin Choi
- Center for Clinical Research, Samsung Biomedical Research Institute, Seoul, Republic of Korea
| | - Yongkang Kim
- Department of Statistics, Seoul National University, Seoul, Republic of Korea
| | - Taesung Park
- Department of Statistics, Seoul National University, Seoul, Republic of Korea
| | - Kyooseob Ha
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea.,Institute of Human Behavioral Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ji Hyun Baek
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Republic of Korea
| |
Collapse
|
6
|
Aguglia A, Cuomo A, Amerio A, Bolognesi S, Di Salvo G, Fusar-Poli L, Goracci A, Surace T, Serafini G, Aguglia E, Amore M, Fagiolini A, Maina G. A new approach for seasonal pattern: is it related to bipolarity dimension? Findings from an Italian multicenter study. Int J Psychiatry Clin Pract 2021; 25:73-81. [PMID: 33399494 DOI: 10.1080/13651501.2020.1862235] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The aims of this study were to assess the impact of seasonal pattern on several clinical dimensions in inpatients with a current major depressive episode and to evaluate clinical differences between unipolar and bipolar depression according to seasonal pattern. METHODS Study participants were 300 patients affected by major depressive disorder (MDD) or bipolar disorder (BD) currently experiencing a major depressive episode (MDE) and were recruited at three University Medical Centres in Italy. All study subjects completed several evaluation scales for depressive and hypomanic symptoms, quality of life and functioning, impulsiveness, and seasonal pattern. RESULTS Several differences between BD with and without seasonal pattern, MDD with and without seasonal pattern but in particular between BD and MDD with seasonal pattern were found. Patients with MDE with seasonal pattern had more frequently received a longitudinal diagnosis of BD. CONCLUSIONS A large number of patients with BD and seasonal pattern, but also a considerable number of patients with MDD and seasonal pattern, endorsed manic items during a current MDE. Seasonal pattern should be associated with a concept of bipolarity in mood disorders and not only related to bipolar disorder. A correct identification of seasonal patterns may lead to the implementation of personalised pharmacological treatment approaches.KEY POINTSHigh prevalence of mixed features in mood disorders with seasonal pattern, supporting the need for a dimensional approach to major depressive disorder and bipolar disorder.Significant percentage of patients with a primary diagnosis of major depressive disorder had seasonal pattern.Significant percentage of patients with a primary diagnosis of major depressive disorder reported (hypo)manic symptomatology.
Collapse
Affiliation(s)
- Andrea Aguglia
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Section of Psychiatry, University of Genoa, Genoa, Italy.,IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Alessandro Cuomo
- Department of Molecular Medicine, University of Siena, Siena, Italy
| | - Andrea Amerio
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Section of Psychiatry, University of Genoa, Genoa, Italy.,IRCCS Ospedale Policlinico San Martino, Genoa, Italy.,Mood Disorders Program, Tufs Medical center, Boston, MA, USA
| | - Simone Bolognesi
- Department of Molecular Medicine, University of Siena, Siena, Italy
| | - Gabriele Di Salvo
- Rita Levi Montalcini Department of Neuroscience, University of Turin, University Hospital San Luigi Gonzaga, Turin, Italy
| | - Laura Fusar-Poli
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Arianna Goracci
- Department of Molecular Medicine, University of Siena, Siena, Italy
| | - Teresa Surace
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Gianluca Serafini
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Section of Psychiatry, University of Genoa, Genoa, Italy.,IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Eugenio Aguglia
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
| | - Mario Amore
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Section of Psychiatry, University of Genoa, Genoa, Italy.,IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Andrea Fagiolini
- Department of Molecular Medicine, University of Siena, Siena, Italy
| | - Giuseppe Maina
- Rita Levi Montalcini Department of Neuroscience, University of Turin, University Hospital San Luigi Gonzaga, Turin, Italy
| |
Collapse
|
7
|
Fico G, de Toffol M, Anmella G, Sagué-Vilavella M, Dellink A, Verdolini N, Pacchiarotti I, Goikolea JM, Solmi M, Vieta E, Murru A. Clinical correlates of seasonality in bipolar disorder: A specifier that needs specification? Acta Psychiatr Scand 2021; 143:162-171. [PMID: 33140436 DOI: 10.1111/acps.13251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 10/09/2020] [Accepted: 10/28/2020] [Indexed: 01/16/2023]
Abstract
OBJECTIVE Seasonal pattern (SP) is a bipolar disorder (BD) specifier that indicates a tendency towards affective relapses during specific moments of the year. SP affects 15%-25% of BD patients. In the past, SP was applied only to depressive relapses while, in DSM-5, SP may be applied to both depressive and (hypo)manic episodes. We examined the association between different clinical correlates of BD and SP according to its current definition in a cohort of patients with BD type I (BDI) and II (BDII). METHODS Patients were recruited from a specialized unit and assessed according to the season of relapse and type of episode per season. SP and non-SP patients were compared looking into sociodemographic and clinical correlates. Significant variables at univariate comparisons were included in multivariate logistic regression with SP as the dependent variable. RESULTS 708 patients were enrolled (503 BDI, 205 BDII), and 117 (16.5%) fulfilled DSM-5 criteria for SP. The mean age was 45.3 years (SD = 14.18), and 389 were female (54.9%). The logistic regression model included a significant contribution of BDII (OR = 2.23, CI 1.4-3.55), family history of mood disorder (OR = 1.97, CI 1.29-3.01), undetermined predominant polarity (OR = 0.44, CI 0.28-0.70), and aggressive behavior (OR = 0.42, CI 0.23-0.75). CONCLUSION Our results outline a novel positive association of SP with undetermined predominant polarity, BDII, family history of mood disorder, and with fewer aggressiveness-related symptoms. Seasonality is associated with a biphasic pattern with similar dominance of (hypo)mania and depression and is more frequent in BDII as compared to BDI. Seasonal episodes may be easier to predict, but difficult to prevent.
Collapse
Affiliation(s)
- Giovanna Fico
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Marco de Toffol
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain.,Neurosciences Department, University of Padua, Padua, Italy
| | - Gerard Anmella
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Maria Sagué-Vilavella
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Annelies Dellink
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain.,Behavioural and Cognitive Neuroscience Programme, Faculty of Science and Engineering, University of Groningen, Groningen, The Netherlands
| | - Norma Verdolini
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Isabella Pacchiarotti
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Jose Manuel Goikolea
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Marco Solmi
- Neurosciences Department, University of Padua, Padua, Italy
| | - Eduard Vieta
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain
| | - Andrea Murru
- Bipolar and Depressive Disorders Unit, Institute of Neuroscience, Hospital Clinic, University of Barcelona, IDIBAPS, Barcelona, Spain
| |
Collapse
|
8
|
Madsen HØ, Ba-Ali S, Lund-Andersen H, Martiny K, Hageman I. Mood and behavior seasonality in glaucoma; assessing correlations between seasonality and structure and function of the retinal ganglion cells. PLoS One 2020; 15:e0229991. [PMID: 32163458 PMCID: PMC7067444 DOI: 10.1371/journal.pone.0229991] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 02/18/2020] [Indexed: 12/26/2022] Open
Abstract
Aim In glaucoma, depression and disturbed sleep has been associated with degeneration of the intrinsically photosensitive retinal ganglion cells, that mediate non-image forming effects of light such as regulation of circadian rhythm, alertness and mood. In this study we assessed associations between seasonal mood and behavior variation and retinal ganglion cell damage in outpatients with glaucoma. Methods The seasonal pattern assessment questionnaire was administered to outpatients with glaucoma. Data on visual field defects identified by autoperimetry and retinal nerve fiber layer thickness visualized by ocular coherence tomography were collected from patient charts. The correlations between seasonality and retinal damage were tested and the adjusted effects of retinal function on seasonality were evaluated in a linear regression model. Results In total, 113 persons completed the questionnaire. Of these, 4% fulfilled the criteria for seasonal affective disorder (SAD) and 8% for subsyndromal seasonal affective disorder (sSAD). Mean global seasonal score was 4.3. There were no significant correlations between seasonality and either visual field or retinal nerve fiber layer thickness. In the adjusted analysis there were trends toward differential effects of visual field on seasonality in subgroups with different sex and type of glaucoma. Conclusion There were no strong associations between seasonality and visual field or retinal nerve fiber layer thickness. Sex, age and glaucoma subtype may modify light effects on complex regulatory systems.
Collapse
Affiliation(s)
| | - Shakoor Ba-Ali
- Department of Ophthalmology, Rigshospitalet-Glostrup Hospital, Copenhagen, Denmark
| | - Henrik Lund-Andersen
- Department of Ophthalmology, Rigshospitalet-Glostrup Hospital, Copenhagen, Denmark
| | - Klaus Martiny
- Mental Health Center Copenhagen, Copenhagen, Denmark
| | - Ida Hageman
- Mental Health Services, Capital Region of Denmark, Copenhagen, Denmark
| |
Collapse
|
9
|
Cheng S, Buckley NA, Siu W, Chiew AL, Vecellio E, Chan BS. Seasonal and temperature effect on serum lithium concentrations. Aust N Z J Psychiatry 2020; 54:282-287. [PMID: 31782314 DOI: 10.1177/0004867419889160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Lithium remains the gold standard treatment for bipolar disorder. However, it has a very narrow therapeutic index (0.6-0.8 mmol/L). It has been suggested that high environmental temperature can lead to dehydration, elevated plasma lithium concentration and then lithium toxicity. OBJECTIVES We aimed to investigate the effect of seasonal and short-term changes in temperature on serum lithium concentrations in Sydney, Australia. METHODS We retrospectively analysed data from all patients who had serum lithium concentrations taken from the Prince of Wales and Sutherland Hospitals between 2008 and 2018. Temperature data came from the Bureau of Meteorology. We examined correlations between lithium concentrations and the preceding 5 days maximum temperatures, month and season. We also performed a longitudinal analysis of the effect of temperature and seasons within selected patients who had repeated levels. RESULTS A total of 11,912 serum lithium concentrations from 2493 patients were analysed. There was no significant association between higher lithium concentration and preceding higher temperatures (r = -0.008, p = 0.399). There was also no important seasonal or monthly variation, across all patients or in the smaller cohort with longitudinal data (n = 123, r = 0.008, 95% confidence interval: [-0.04, 0.06]). CONCLUSION There were no clinically important differences in serum lithium concentration related to seasons, months or temperatures, which suggests that patients on lithium are able to adequately maintain hydration during hot weather in Sydney.
Collapse
Affiliation(s)
- Sonia Cheng
- Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Nicholas A Buckley
- Department of Clinical Pharmacology, The University of Sydney, Sydney, NSW, Australia
| | - William Siu
- Emergency Department, Sutherland Hospital, Sydney, NSW, Australia
| | - Angela L Chiew
- Department of Emergency Medicine & Clinical Toxicology, Prince of Wales Hospital, Sydney, NSW, Australia
| | - Elia Vecellio
- NSW Health Pathology, Prince of Wales Hospital, Sydney, NSW, Australia
| | - Betty S Chan
- Department of Emergency Medicine & Clinical Toxicology, Prince of Wales Hospital, Sydney, NSW, Australia
| |
Collapse
|
10
|
Gonzalez R, Gonzalez SD, McCarthy MJ. Using Chronobiological Phenotypes to Address Heterogeneity in Bipolar Disorder. MOLECULAR NEUROPSYCHIATRY 2020; 5:72-84. [PMID: 32399471 DOI: 10.1159/000506636] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 02/18/2020] [Indexed: 12/12/2022]
Abstract
Bipolar disorder (BD) is a neuropsychiatric mood disorder characterized by recurrent episodes of mania and depression in addition to disruptions in sleep, energy, appetite, and cognitive functions-rhythmic behaviors that typically change on daily cycles. BD symptoms can also be provoked by seasonal changes, sleep, and/or circadian disruption, indicating that chronobiological factors linked to the circadian clock may be a common feature in the disorder. Research indicates that BD exists on a clinical spectrum, with distinct subtypes often intersecting with other psychiatric disorders. This heterogeneity has been a major challenge to BD research and contributes to problems in diagnostic stability and treatment outcomes. To address this heterogeneity, we propose that chronobiologically related biomarkers could be useful in classifying BD into objectively measurable phenotypes to establish better diagnoses, inform treatments, and perhaps lead to better clinical outcomes. Presently, we review the biological basis of circadian time keeping in humans, discuss the links of BD to the circadian clock, and pre-sent recent studies that evaluated chronobiological measures as a basis for establishing BD phenotypes. We conclude that chronobiology may inform future research using other novel techniques such as genomics, cell biology, and advanced behavioral analyses to establish new and more biologically based BD phenotypes.
Collapse
Affiliation(s)
- Robert Gonzalez
- Department of Psychiatry and Behavioral Health, Penn State Health, Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Suzanne D Gonzalez
- Department of Psychiatry and Behavioral Health, Penn State Health, Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA.,Department of Pharmacology, Penn State Health, Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Michael J McCarthy
- VA San Diego Healthcare System, San Diego, California, USA.,Department of Psychiatry and Center for Chronobiology, University of California, San Diego, La Jolla, California, USA
| |
Collapse
|
11
|
Porcu A, Gonzalez R, McCarthy MJ. Pharmacological Manipulation of the Circadian Clock: A Possible Approach to the Management of Bipolar Disorder. CNS Drugs 2019; 33:981-999. [PMID: 31625128 DOI: 10.1007/s40263-019-00673-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Bipolar disorder (BD) is a mood disorder with genetic and neurobiological underpinnings, characterized primarily by recurrent episodes of mania and depression, with notable disruptions in rhythmic behaviors such as sleep, energy, appetite and attention. The chronobiological links to BD are further supported by the effectiveness of various treatment modalities such as bright light, circadian phase advance, and mood-stabilizing drugs such as lithium that have effects on the circadian clock. Over the past 30 years, the neurobiology of the circadian clock has been exquisitely described and there now exists a detailed knowledge of key signaling pathways, neurotransmitters and signaling mechanisms that regulate various dimensions of circadian clock function. With this new wealth of information, it is becoming increasingly plausible that new drugs for BD could be made by targeting molecular elements of the circadian clock. However, circadian rhythms are multidimensional and complex, involving unique, time-dependent factors that are not typically considered in drug development. We review the organization of the circadian clock in the central nervous system and briefly summarize data implicating the circadian clock in BD. We then consider some of the unique aspects of the circadian clock as a drug target in BD, discuss key methodological considerations and evaluate some of the candidate clock pathways and systems that could serve as potential targets for novel mood stabilizers. We expect this work will serve as a roadmap to facilitate the development of compounds acting on the circadian clock for the treatment of BD.
Collapse
Affiliation(s)
- Alessandra Porcu
- Department of Psychiatry and Center for Circadian Biology, University of California San Diego, La Jolla, CA, 92093, USA
| | - Robert Gonzalez
- Department of Psychiatry, Penn State Health Milton S. Hershey Medical Center, Hershey, PA, 17033-0850, USA
| | - Michael J McCarthy
- Department of Psychiatry and Center for Circadian Biology, University of California San Diego, La Jolla, CA, 92093, USA. .,Psychiatry Service, VA San Diego Healthcare System, 3350 La Jolla Village Dr MC116A, San Diego, CA, 92161, USA.
| |
Collapse
|
12
|
Peedicayil J. The role of epigenetics in seasonal changes in mood disorders. Bipolar Disord 2018; 20:668. [PMID: 30259620 DOI: 10.1111/bdi.12697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Jacob Peedicayil
- Department of Pharmacology & Clinical Pharmacology, Christian Medical College, Vellore, India
| |
Collapse
|
13
|
Cléry-Melin ML, Gorwood P, Friedman S, Even C. Stability of the diagnosis of seasonal affective disorder in a long-term prospective study. J Affect Disord 2018; 227:353-357. [PMID: 29145077 DOI: 10.1016/j.jad.2017.11.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 09/09/2017] [Accepted: 11/04/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Seasonal affective disorder (SAD) is mainly characterized by a seasonal pattern of depressive recurrences over the years. However, few studies have been conducted on the long-term course of patients with SAD, whose findings raised questions about the diagnosis stability over time. This study aimed to better characterize the diagnosis evolution, and determine prognosis markers. METHODS An initial cohort of 225 outpatients diagnosed as having a SAD, was assessed at baseline (T1) for clinical symptoms and response to bright light therapy. One hundred and nineteen patients (53%) were interviewed 2-12 years after (T2). RESULTS Of 119 patients reached at follow-up (T2), only 32 patients (27%) still fulfilled the DSM-IV criteria for a stable SAD (S-SAD). A large proportion (59%) of the follow up cohort was in remission and 14% still suffered from a non-seasonal mood disorder. Family history of depression, previous suicide attempt, carbohydrate craving and HAD-depression score at baseline were associated with a stable SAD (S-SAD) diagnosis at T2, the HAD-depression score being the only one still significantly predictive (p=0.025) of a later stable SAD, with a multivariate approach. Carbohydrate craving, a core symptom of SAD, showed a trend (p=0.100) to predict diagnosis stability. LIMITATIONS Only 53% patients from the initial cohort were assessed at follow-up. CONCLUSIONS Patients with eventual stable SAD show more subjective severity (higher HAD-Depression score) and carbohydrate craving at baseline. A low predictive validity of diagnosis criteria suggests that SAD is a temporary expression of a mood disorder rather than a specific disorder.
Collapse
Affiliation(s)
- Marie-Laure Cléry-Melin
- CMME (Groupe Hospitalier Sainte-Anne), Paris Descartes University, France; INSERM U894, Centre of Psychiatry and Neurosciences, 75014 Paris, France.
| | - Philip Gorwood
- CMME (Groupe Hospitalier Sainte-Anne), Paris Descartes University, France; INSERM U894, Centre of Psychiatry and Neurosciences, 75014 Paris, France
| | - Serge Friedman
- CMME (Groupe Hospitalier Sainte-Anne), Paris Descartes University, France
| | - Christian Even
- CMME (Groupe Hospitalier Sainte-Anne), Paris Descartes University, France
| |
Collapse
|
14
|
Rumble ME, Dickson D, McCall WV, Krystal AD, Case D, Rosenquist PB, Benca RM. The relationship of person-specific eveningness chronotype, greater seasonality, and less rhythmicity to suicidal behavior: A literature review. J Affect Disord 2018; 227:721-730. [PMID: 29179142 PMCID: PMC5805608 DOI: 10.1016/j.jad.2017.11.078] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 09/11/2017] [Accepted: 11/11/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND Epidemiological data have demonstrated seasonal and circadian patterns of suicidal deaths. Several reviews and meta-analyses have confirmed the relationship between sleep disturbance and suicidality. However, these reviews/meta-analyses have not focused on seasonal and circadian dysfunction in relation to suicidality, despite the common presence of this dysfunction in patients with mood disorders. Thus, the current literature review analyzed studies investigating person-specific chronotype, seasonality, and rhythmicity in relation to suicidal thoughts and behaviors. METHODS Study authors reviewed articles related to individual-level chronotype, seasonality, and rhythmicity and suicidality that were written in English and not case reports or reviews. RESULTS This review supports a relationship between an eveningness chronotype, greater seasonality, and decreased rhythmicity with suicidal thoughts and behaviors in those with unipolar depression, as well as in other psychiatric disorders and in children/adolescents. LIMITATIONS These findings need to be explored more fully in mood disordered populations and other psychiatric populations, in both adults and children, with objective measurement such as actigraphy, and with chronotype, seasonality, and rhythmicity as well as broader sleep disturbance measurement all included so the construct(s) most strongly linked to suicidality can be best identified. CONCLUSIONS Eveningness, greater seasonality, and less rhythmicity should be considered in individuals who may be at risk for suicidal thoughts and behaviors and may be helpful in further tailoring assessment and treatment to improve patient outcome.
Collapse
Affiliation(s)
- Meredith E Rumble
- Department of Psychiatry, University of Wisconsin, Madison, United States.
| | - Daniel Dickson
- Department of Psychiatry, University of Wisconsin, Madison, United States
| | - W Vaughn McCall
- Department of Psychiatry and Health Behavior, Medical College of Georgia, Augusta University, Augusta, United States
| | - Andrew D Krystal
- Department of Psychiatry, University of California, San Francisco, United States; Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, United States
| | - Doug Case
- Department of Biostatistical Sciences, Division of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC, United States
| | - Peter B Rosenquist
- Department of Psychiatry and Health Behavior, Medical College of Georgia, Augusta University, Augusta, United States
| | - Ruth M Benca
- Department of Psychiatry and Human Behavior, University of California, Irvine, United States
| |
Collapse
|
15
|
Keskin N, Tamam L, Ozpoyraz N. Assessment of sleep quality in bipolar euthymic patients. Compr Psychiatry 2018; 80:116-125. [PMID: 29091777 DOI: 10.1016/j.comppsych.2017.09.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 09/10/2017] [Accepted: 09/27/2017] [Indexed: 01/26/2023] Open
Abstract
OBJECTIVE Sleep quality is affected in bipolar disorder even in euthymic episodes. The aim of this study was to assess sleep quality in bipolar euthymic patients, determine related clinical characteristics and evaluate its effects on functionality. METHODS A total of 122 outpatients were included. Scales were used to confirm that patients were euthymic. Mini Mental Test was performed to exclude patients with a diagnosis of dementia. A data form for socio-demographic features and clinical characteristics of bipolar disorder have been completed. SCID-I and SCID II were used. The general features of sleep were investigated by General Sleep Questionnaire. All patients completed Pittsburgh Sleep Quality Index, Epworth Sleepiness Scale and Bipolar Disorder Functioning Questionnaire. RESULTS 56.5% of our sample had poor sleep quality. Patients with poor sleep had a longer time to fall asleep and more frequent waking after sleep onset. Caffeine use and smoking, history of suicide attempts, seasonality, comorbidity of lifetime anxiety, somatoform and impulse control disorders, using antidepressant medication and administration of electroconvulsive therapy were significantly higher; emotional and intellectual functioning, household relations, taking initiative, self-sufficiency and total functionality were lower in bipolar patients with poor sleep quality (p<0.05). The strongest predictor of sleep quality problem was seasonality, recording an odds ratio of 3.91. CONCLUSIONS Sleep quality is closely related with clinical features of bipolar disorder. Sleep quality is affected negatively in euthymic episodes of bipolar disorder and poor sleep quality cause loss in functionality. Assessment of sleep disturbances routinely in psychiatric interviews and dealing with sleep problems regardless mood episodes may improve sleep quality, thereby functionality and quality of life.
Collapse
Affiliation(s)
- Necla Keskin
- Van Training and Research Hospital, Van, Turkey.
| | - Lut Tamam
- Cukurova University Faculty of Medicine, Department of Psychiatry, Adana, Turkey
| | - Nurgul Ozpoyraz
- Cukurova University Faculty of Medicine, Department of Psychiatry, Adana, Turkey
| |
Collapse
|
16
|
Yang SY, Baek JH, Cho Y, Cho EY, Choi Y, Kim Y, Park T, Hong KS. Effects of genetic variants of ST8SIA2 and NCAM1 genes on seasonal mood changes and circadian preference in the general population. Chronobiol Int 2017; 35:405-415. [PMID: 29215920 DOI: 10.1080/07420528.2017.1410827] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
ST8SIA2 and NCAM1 are functionally related genes forming polysialic acid (PSA) - neural cell adhesion molecule (NCAM) complex in suprachiasmatic nucleus (SCN), the regulating site of circadian biological rhythm. In this study, the relationship of ST8SIA2 and NCAM1 with circadian and seasonal rhythms of human behavior was explored. Subjects were 261 healthy Korean adults who were free of any history of clinically significant psychiatric symptoms. The phenotypes were circadian preference and seasonal change of mood and behavior (seasonality) measured by the Composite Scale of Morningness and the Seasonal Pattern Assessment Questionnaire, respectively. Thirty-four single nucleotide polymorphisms (SNPs) across the ST8SIA2 region and 15 SNPs of NCAM1 were analyzed. A nominally significant association with seasonality and circadian preference was observed in 21 variants of both genes. After corrections for multiple testing, associations of 8 SNPs of ST8SIA2 and 2 SNPs of NCAM1 with seasonality remained significant. Some of these SNPs were also associated with psychiatric disorders in previous studies. This study demonstrated a meaningful and/or suggestive evidence of association between behavioral phenotypes reflecting human biological rhythm and two interplaying genes involved in the plasticity of SCN's neuronal network.
Collapse
Affiliation(s)
- So Yung Yang
- a Department of Psychiatry , Sungkyunkwan University School of Medicine, Samsung Medical Center , Seoul , Korea
| | - Ji Hyun Baek
- a Department of Psychiatry , Sungkyunkwan University School of Medicine, Samsung Medical Center , Seoul , Korea
| | - Youngah Cho
- b Department of Psychiatry , Seoul National University Bundang Hospital , Kyunggi-Do , Korea
| | - Eun-Young Cho
- c Center for Clinical Research , Samsung Biomedical Research Institute , Seoul , Korea
| | - Yujin Choi
- c Center for Clinical Research , Samsung Biomedical Research Institute , Seoul , Korea
| | - Yongkang Kim
- d Department of Statistics , Seoul National University , Seoul , Korea
| | - Taesung Park
- d Department of Statistics , Seoul National University , Seoul , Korea
| | - Kyung Sue Hong
- a Department of Psychiatry , Sungkyunkwan University School of Medicine, Samsung Medical Center , Seoul , Korea.,c Center for Clinical Research , Samsung Biomedical Research Institute , Seoul , Korea
| |
Collapse
|
17
|
Seasonal variations in rates of hospitalisation for mania and hypomania in psychiatric hospitals in NSW. J Affect Disord 2016; 191:289-91. [PMID: 26688498 DOI: 10.1016/j.jad.2015.11.053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 11/30/2015] [Indexed: 11/21/2022]
Abstract
BACKGROUND A number of studies have established that manic patients have higher rates of hospitalization in spring. There appears to be no data evaluating whether there is any seasonal variation in hospitalization for those with hypomania. METHODS Data were obtained for 27,255 individuals hospitalized in NSW psychiatric hospitals over a 14-year period (2000-2014) for ICD-10 diagnosed mania or hypomania. Graphical analyzes examined rates of hospitalisation for hypomania and mania separately, using monthly and seasonal averages. RESULTS Admission rates were higher for mania compared to hypomania and there was a similar pattern across seasons - with admissions being at their lowest in autumn, increasing in winter, and at their highest for spring. Monthly percentage scores were similar for mania and hypomania and indicated lower admission rates in the first six months of the year (January-June), with a sudden increase in July, and followed by a more gradual increase until December. LIMITATIONS Hospitalization rates do not necessarily provide an accurate estimate of the onset of hypo/manic episodes, while the validity of those assigned a diagnosis of hypomania could not be established, allowing the possibility that many may have had manic episodes. CONCLUSIONS Findings indicate that hypomania shows a similar seasonal pattern to mania.
Collapse
|
18
|
Pirkola S, Eriksen HA, Partonen T, Kieseppä T, Veijola J, Jääskeläinen E, Mylläri-Figuerola EM, Salo PM, Paunio T. Seasonal variation in affective and other clinical symptoms among high-risk families for bipolar disorders in an Arctic population. Int J Circumpolar Health 2015; 74:29671. [PMID: 26589395 PMCID: PMC4654770 DOI: 10.3402/ijch.v74.29671] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 10/14/2015] [Accepted: 10/26/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND In bipolar disorder (BD), seasonality of symptoms is common and disturbances in circadian rhythms have been reported. OBJECTIVES We identified high-penetrance families in a geographically restricted area in Northern Fennoscandia and studied the seasonal variation of clinical symptoms among BD subjects and their healthy relatives. DESIGN We explored the clinical characteristics of subjects living in Northern Fennoscandia, with extreme annual variation in daylight. Among known indigenous high-risk families for BD, we compared the affected ones (N=16) with their healthy relatives (N=15), and also included 18 healthy non-related controls from the same geographical area. Seasonal fluctuation in clinical measures was followed up at the 4 most demarcated photoperiodic time points of the annual cycle: around the summer solstice and autumn equinox in 2013, the winter solstice in 2013/2014, and the spring equinox in 2014. In the baseline, lifetime manic symptoms [Mood Disorder Questionnaire (MDQ)] and morningness-eveningness questionnaire type (MEQ) were registered, whereas in the follow-up, depressive [Beck Depression Inventory (BDI)] and distress [General Health Questionnaire (GHQ-12)] symptoms and alcohol consumption and sleep were recorded. RESULTS Possibly indicative or statistically significant differences in symptoms between the affected subjects and their healthy relatives were the BDI winter (13.3 vs. 2.6, t=-2.51, p=0.022) and spring scores (12.6 vs. 3.2, t=-1.97, p=0.063) and GHQ winter (4.2 vs. 0.82, t=-2.08, p=0.052) and spring scores (3.8 vs. 0.82, t=-1.97, p=0.063). Scores were higher among the affected subjects, exceeding a possibly diagnostic threshold (10 and 3) at all the time points, and without the notable seasonality which was observed among the healthy relatives. In the overall population, MDQ and MEQ scores had an inverse correlation (-0.384, significant at 0.016), indicating increased lifetime manic behaviour among "the night owl" chronotype subjects. CONCLUSIONS In an Arctic population sample, we found different seasonal fluctuation in mood and distress symptoms and sleep duration scores between subjects with bipolar spectrum disorders and their healthy relatives. Despite the relatively small sample size, the results indicate that the symptoms and signs of BD relate to a disturbance in seasonal variation. Seasonal variation can be considered as an interesting endophenotype for BD and a promising target for further genetic studies.
Collapse
Affiliation(s)
- Sami Pirkola
- Department of Psychiatry, University and University Hospital of Oulu, Oulu, Finland.,National Institute of Health and Welfare, Helsinki, Finland.,Depertment of Social Psychiatry, School of Health Sciences, University of Tampere, Tampere, Finland;
| | - Heidi A Eriksen
- Centre of Arctic Medicine, Thule Institute, University of Oulu, Oulu, Finland
| | - Timo Partonen
- National Institute of Health and Welfare, Helsinki, Finland
| | - Tuula Kieseppä
- Helsinki University Central Hospital, University of Helsinki, Helsinki, Finland
| | - Juha Veijola
- Department of Psychiatry, University and University Hospital of Oulu, Oulu, Finland
| | - Erika Jääskeläinen
- Department of Psychiatry, University and University Hospital of Oulu, Oulu, Finland
| | | | - Paula M Salo
- National Institute of Health and Welfare, Helsinki, Finland
| | - Tiina Paunio
- National Institute of Health and Welfare, Helsinki, Finland.,Helsinki University Central Hospital, University of Helsinki, Helsinki, Finland
| |
Collapse
|
19
|
Gonzalez R, Gonzalez S, Villa E, Ramirez M, Zavala J, Armas R, Contreras J, Dassori A, Leach RJ, Flores D, Jerez A, Raventós H, Ontiveros A, Nicolini H, Escamilla M. Identification of circadian gene variants in bipolar disorder in Latino populations. J Affect Disord 2015; 186:367-75. [PMID: 26283580 DOI: 10.1016/j.jad.2015.07.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Revised: 06/23/2015] [Accepted: 07/08/2015] [Indexed: 01/02/2023]
Abstract
BACKGROUND Variations in circadian genes can impact biological rhythms. Given the rhythm disturbances that characterize bipolar disorder (BD), genes encoding components of molecular clocks are good candidate genes for the illness. METHODS A family based association analysis of circadian gene single nucleotide polymorphisms (SNPs) and BD was conducted in Latino pedigrees. 884 individuals from 207 pedigrees (473BP phenotype and 411 unaffected family members) were genotyped. Family based single marker association testing was performed. Ancestral haplotypes (SNPs found to be in strong LD defined using confidence intervals) were also tested for association with BD. RESULTS Multiple suggestive associations between circadian gene SNPs and BD were noted. These included CSNK1E (rs1534891, p=0.00689), ARNTL (rs3789327, p=0.021172), CSNK1D (rs4510078, p=0.022801), CLOCK (rs17777927, p=0.031664). Individually, none of the SNPs were significantly associated with BD after correction for multiple testing. However, a 4-locus CSNK1E haplotype encompassing the rs1534891 SNP (Z-score=2.685, permuted p=0.0076) and a 3-locus haplotype in ARNTL (Z-score=3.269, permuted p=0.0011) showed a significant association with BD. LIMITATIONS Larger samples are required to confirm these findings and assess the relationship between circadian gene SNPs and BD in Latinos. CONCLUSIONS The results suggest that ARNTL and CSKN1E variants may be associated with BD. Further studies are warranted to assess the relationships between these genes and BD in Latino populations.
Collapse
Affiliation(s)
- Robert Gonzalez
- Department of Psychiatry and Center of Excellence for Neurosciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA.
| | - Suzanne Gonzalez
- Department of Psychiatry and Center of Excellence for Neurosciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA
| | - Erika Villa
- Department of Psychiatry and Center of Excellence for Neurosciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA
| | - Mercedes Ramirez
- Department of Psychiatry and Center of Excellence for Neurosciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA
| | - Juan Zavala
- Department of Psychiatry and Center of Excellence for Neurosciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA
| | - Regina Armas
- Langley Porter Psychiatric Institute, University of California at San Francisco, San Francisco, CA, USA
| | - Javier Contreras
- Centro de Investigación en Biología Celular y Molecular y Escuela de Biologia, Universidad de Costa Rica, San Jose, Costa Rica
| | - Albana Dassori
- Department of Psychiatry, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA; South Texas Veterans Health Care System, San Antonio, TX, USA
| | - Robin J Leach
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Deborah Flores
- Los Angeles Biomedical Research Center at Harbor, University of California Los Angeles Medical Center, Torrance, CA, USA
| | - Alvaro Jerez
- Centro Internacional de Trastornos Afectivos y de la Conducta Adictiva, Guatemala, Guatemala
| | - Henriette Raventós
- Centro de Investigación en Biología Celular y Molecular y Escuela de Biologia, Universidad de Costa Rica, San Jose, Costa Rica
| | - Alfonso Ontiveros
- Instituto de Información e Investigación en Salud Mental AC, Monterrey, Nuevo Leon, Mexico
| | - Humberto Nicolini
- Grupo de Estudios Médicos y Familiares Carracci, S.C., México, D.F., Mexico
| | - Michael Escamilla
- Department of Psychiatry and Center of Excellence for Neurosciences, Paul L. Foster School of Medicine, Texas Tech University Health Sciences Center, El Paso, TX, USA
| |
Collapse
|
20
|
Dominiak M, Swiecicki L, Rybakowski J. Psychiatric hospitalizations for affective disorders in Warsaw, Poland: Effect of season and intensity of sunlight. Psychiatry Res 2015; 229:287-94. [PMID: 26189339 DOI: 10.1016/j.psychres.2015.07.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 07/03/2015] [Accepted: 07/04/2015] [Indexed: 12/21/2022]
Abstract
The purpose of this study was to assess any associations between the number of hospitalizations for affective disorders, seasons of the year and the intensity of sunlight in Poland, a country with a very changeable climate and significant seasonal fluctuations. We analyzed 2837 admissions with affective disorders hospitalized in the Institute of Psychiatry and Neurology in Warsaw, between 2002 and 2010 (mania, n=380, mixed episode, n=131, bipolar depression, n=736, recurrent depression, n=681, single depressive episode, n=909). For each diagnostic group admission time series were created and categorized into subgroups according to sex and age, and these were analyzed by means of the Autoregressive Integrated Moving Average (ARIMA) method. Regression models and correlations were used to assess the influence of the intensity of sunlight on the number of hospitalizations. Most mania admissions were noted in spring/summer months and in midwinter, mixed episode-late spring and winter, and depression (bipolar, recurrent and single depressive episode)-spring and autumn months. The association between frequency of admissions and monthly hours of sunshine was observed in some age and sex subgroups of patients with bipolar disorder and single depressive episode. The results support the seasonality of admissions of patients with affective disorders.
Collapse
Affiliation(s)
- Monika Dominiak
- Institute of Psychiatry and Neurology, ul. Sobieskiego 9, 02-957 Warsaw, Poland.
| | - Lukasz Swiecicki
- Institute of Psychiatry and Neurology, ul. Sobieskiego 9, 02-957 Warsaw, Poland
| | - Janusz Rybakowski
- Department of Adult Psychiatry, Poznan University of Medical Sciences, ul. Szpitalna 27/33, 60-572 Poznan, Poland
| |
Collapse
|
21
|
McWilliams S, Kinsella A, O'Callaghan E. Daily weather variables and affective disorder admissions to psychiatric hospitals. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2014; 58:2045-2057. [PMID: 24599495 DOI: 10.1007/s00484-014-0805-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 12/17/2013] [Accepted: 02/12/2014] [Indexed: 06/03/2023]
Abstract
Numerous studies have reported that admission rates in patients with affective disorders are subject to seasonal variation. Notwithstanding, there has been limited evaluation of the degree to which changeable daily meteorological patterns influence affective disorder admission rates. A handful of small studies have alluded to a potential link between psychiatric admission rates and meteorological variables such as environmental temperature (heat waves in particular), wind direction and sunshine. We used the Kruskal-Wallis test, ARIMA and time-series regression analyses to examine whether daily meteorological variables--namely wind speed and direction, barometric pressure, rainfall, hours of sunshine, sunlight radiation and temperature--influence admission rates for mania and depression across 12 regions in Ireland over a 31-year period. Although we found some very weak but interesting trends for barometric pressure in relation to mania admissions, daily meteorological patterns did not appear to affect hospital admissions overall for mania or depression. Our results do not support the small number of papers to date that suggest a link between daily meteorological variables and affective disorder admissions. Further study is needed.
Collapse
|
22
|
Geoffroy PA, Bellivier F, Scott J, Etain B. Seasonality and bipolar disorder: a systematic review, from admission rates to seasonality of symptoms. J Affect Disord 2014; 168:210-23. [PMID: 25063960 DOI: 10.1016/j.jad.2014.07.002] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 07/01/2014] [Accepted: 07/02/2014] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Bipolar disorder (BD) is a severe mental disorder affecting 1-4% of the population worldwide. It is characterized by periods of (hypo)manic and depressive episodes. Seasonal patterns (SP) may be observed in admission rates, mood relapses and symptom fluctuations. METHODS We conducted a systematic review of seasonality in BD, classifying studies based on seasonal admission rates to seasonality of symptoms assessments. RESULTS Fifty-one papers were identified of which 32 addressed hospitalization rates by season, 6 addressed categorical diagnoses, and 13 explored symptom dimensions. Seasonal peaks for different BD mood episodes are observed worldwide and widely replicated. Manic episodes peak during spring/summer and, to a lesser extent, in autumn, depressive episodes peak in early winter and, to a lesser extent, summer, and mixed episodes peak in early spring or mid/late summer. There was a high frequency of SP for manic episodes (15%) and depressive episodes (25%), the latter being associated with a more complex clinical profile (BD II subtype, comorbid eating disorders, more relapses and rapid cycling). Finally, there was evidence for greater seasonal fluctuations in mood and behavior in individuals with BD than in those with unipolar depression or 'healthy' controls. LIMITATIONS Sample size, gender distribution, methodological quality and sophistication of the analytical approaches employed varied considerably. CONCLUSIONS There is evidence of seasonality in BD, with emerging evidence that climatic conditions may trigger BD symptoms or episodes. A better understanding of the underlying mechanisms would facilitate the development of personalized chronobiological therapeutic and preventive strategies.
Collapse
Affiliation(s)
- Pierre Alexis Geoffroy
- Inserm, U1144, Paris F-75006, France; AP-HP, GH Saint-Louis - Lariboisière - Fernand Widal, Pôle Neurosciences, 75475 Paris Cedex 10, France; Université Paris Descartes, UMR-S 1144, Paris, F-75006, France; Université Paris Diderot, UMR-S 1144, Paris, F-75013, France; Fondation FondaMental, Créteil, 94000, France.
| | - Frank Bellivier
- Inserm, U1144, Paris F-75006, France; AP-HP, GH Saint-Louis - Lariboisière - Fernand Widal, Pôle Neurosciences, 75475 Paris Cedex 10, France; Université Paris Descartes, UMR-S 1144, Paris, F-75006, France; Université Paris Diderot, UMR-S 1144, Paris, F-75013, France; Fondation FondaMental, Créteil, 94000, France
| | - Jan Scott
- Academic Psychiatry, Institute of Neuroscience, Newcastle University, UK; Centre for Affective Disorders, Institute of Psychiatry, London, UK
| | - Bruno Etain
- Fondation FondaMental, Créteil, 94000, France; AP-HP, Hôpital H. Mondor - A. Chenevier, Pôle de Psychiatrie, Créteil, 94000, France; Inserm, U955, Psychiatrie génétique, Créteil, 94000, France
| |
Collapse
|
23
|
Bae M, Lee K, Baek JH, Kim JS, Cho Y, Ryu S, Ha K, Hong KS. Lifetime experiences of hypomanic symptoms are associated with delayed and irregular sleep-wake cycle and seasonality in non-clinical adult samples. Compr Psychiatry 2014; 55:1111-5. [PMID: 24666716 DOI: 10.1016/j.comppsych.2014.02.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 02/15/2014] [Accepted: 02/17/2014] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVES Disturbances of the sleep-wake cycle and seasonality have been reported in patients with bipolar disorder (BD). Considering that BD seems to be a spectrum condition in terms of clinical and biological characteristics, circadian and seasonal rhythm related to BD could be detected in non-clinical individuals with subthreshold bipolarity. The aim of this study was to screen past hypomanic symptoms in non-clinical samples and investigate their association with deviated sleep-wake cycle and seasonality. METHODS Lifetime history of hypomanic symptoms was assessed with the Hypomania Checklist-32 (HCL-32). Circadian preference, variability of sleep-wake time and seasonal changes in mood and behavior were evaluated on a lifetime-basis in non-clinical adult samples (n=313), using the Composite Scale of Morningness (CSM), the Sleep Timing Questionnaire (STQ), and the Seasonal Pattern Assessment Questionnaire (SPAQ). RESULTS Two subdomains of hypomanic symptoms were identified through factor analysis of HCL-32, i.e., "active/elated" factor and "irritable/risk-taking" factor. The HCL-32 total score (p<0.001) and the "active/elated" factor score (p=0.028) were weakly correlated only with seasonality, whereas the "irritable/risk-taking" factor score was associated not only with seasonality (p<0.001), but also with evening preference (p<0.001) and irregularity of sleep-wake times (p=0.001~0.011). CONCLUSION Circadian and seasonal characteristics related to BD are also associated with a past history of hypomanic symptoms in non-clinical samples, especially "irritable/risk-taking" symptoms, suggesting the existence of subclinical presentation of BD and their biological traits.
Collapse
Affiliation(s)
- Moonoh Bae
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - Kounseok Lee
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - Ji Hyun Baek
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - Ji Sun Kim
- Department of Neuropsychiatry, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Kyunggi-Do, Korea
| | - Youngah Cho
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - Seunghyong Ryu
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - Kyooseob Ha
- Department of Neuropsychiatry, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Kyunggi-Do, Korea; Seoul National Hospital, Seoul, Korea
| | - Kyung Sue Hong
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea; Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea.
| |
Collapse
|
24
|
Geoffroy PA, Bellivier F, Scott J, Boudebesse C, Lajnef M, Gard S, Kahn JP, Azorin JM, Henry C, Leboyer M, Etain B. Bipolar disorder with seasonal pattern: clinical characteristics and gender influences. Chronobiol Int 2013; 30:1101-7. [PMID: 23931033 DOI: 10.3109/07420528.2013.800091] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Bipolar disorder (BD) has a multifactorial etiology with heterogeneous clinical presentations. Around 25% of BD patients may present with a depressive seasonal pattern (SP). However, there are limited scientific data on the prevalence of SP, its clinical manifestations, and any gender influence. Four hundred and fifty-two BD I and II cases (62% female), recruited from three French university-affiliated psychiatric departments, were assessed for SP. Clinical, treatment, and sociodemographic variables were obtained from structured interviews. One hundred and two (23%) cases met DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition) criteria for SP, with similar frequency according to gender. Multivariate analysis showed a significant association between SP and BD II (odds ratio [OR] = 1.99, p = 0.01), lifetime history of rapid cycling (OR = 2.05, p = 0.02), eating disorders (OR = 2.94, p = 0.003), and total number of depressive episodes (OR = 1.13, p = 0.002). Seventy-one percent of cases were correctly classified by this analysis. However, when stratifying the analyses by gender, SP was associated with BD II subtype (OR = 2.89, p = 0.017) and total number of depressive episodes (OR = 1.21, p = 0.0018) in males but with rapid cycling (OR = 3.02, p = 0.0027) and eating disorders (OR = 2.60, p = 0.016) in females. This is the first study to identify different associations between SP and clinical characteristics of BD according to gender. The authors suggest that SP represents a potentially important specifier of BD. These findings indicate that seasonality may reflect increased severity or complexity of disorder.
Collapse
|
25
|
McWilliams S, Kinsella A, O'Callaghan E. The effects of daily weather variables on psychosis admissions to psychiatric hospitals. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2013; 57:497-508. [PMID: 22855350 DOI: 10.1007/s00484-012-0575-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 07/01/2012] [Accepted: 07/03/2012] [Indexed: 06/01/2023]
Abstract
Several studies have noted seasonal variations in admission rates of patients with psychotic illnesses. However, the changeable daily meteorological patterns within seasons have never been examined in any great depth in the context of admission rates. A handful of small studies have posed interesting questions regarding a potential link between psychiatric admission rates and meteorological variables such as environmental temperature (especially heat waves) and sunshine. In this study, we used simple non-parametric testing and more complex ARIMA and time-series regression analysis to examine whether daily meteorological patterns (wind speed and direction, barometric pressure, rainfall, sunshine, sunlight and temperature) exert an influence on admission rates for psychotic disorders across 12 regions in Ireland. Although there were some weak but interesting trends for temperature, barometric pressure and sunshine, the meteorological patterns ultimately did not exert a clinically significant influence over admissions for psychosis. Further analysis is needed.
Collapse
|
26
|
Skalkidou A, Hellgren C, Comasco E, Sylvén S, Sundström Poromaa I. Biological aspects of postpartum depression. ACTA ACUST UNITED AC 2013. [PMID: 23181531 DOI: 10.2217/whe.12.55] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In comparison with the vast epidemiological literature on postpartum depression (PPD), relatively few studies have examined the biological aspects of the disorder. However, research into the biological mechanisms of PPD is a challenging task, as normal pregnancy and the postpartum period cause adaptive endocrine changes, which would otherwise be considered pathological in nonpregnant women. This review focuses on the adaptive changes of childbearing and nursing, which ultimately may put women at increased risk of PPD. In light of the normal physiology, the authors also attempt to describe the current evidence of the biological changes associated with the development of depression in the postpartum period, including ovarian steroids, the hypothalamic-pituitary-adrenal axis, the serotonergic neurotransmitter system, the thyroid system and inflammatory markers. In addition, current knowledge on candidate genes associated with PPD is reviewed.
Collapse
Affiliation(s)
- Alkistis Skalkidou
- Department of Women's & Children's Health, Uppsala University, 751 85, Uppsala, Sweden
| | | | | | | | | |
Collapse
|
27
|
Okasha T, Fikry M, Kowailed A, El-Guwiely T, Sadek H. Screening for bipolar disorder among patients undergoing a major depressive episode: report from the BRIDGE study in Egypt. J Affect Disord 2013. [PMID: 23196197 DOI: 10.1016/j.jad.2012.11.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND To estimate the frequency of bipolar disorder (BPD) among patients with a major depressive episode (MDE) and elucidate clinically-relevant factors predictive of bipolarity. METHODS We evaluated 306 patients undergoing a MDE at facilities throughout Egypt. Patients were given the HCL-32 R2 questionnaire to assess the presence of manic/hypomanic symptoms; those scoring >14 were considered bipolar. We also investigated how various clinical criteria for bipolarity changed the incidence of bipolar diagnosis. Finally, we examined if demographics, psychiatric history, clinical characteristics, and the incidence of co-morbid conditions differed significantly between bipolar and unipolar patients. RESULTS The positive screen rate for BPD based on HCL-32 R2 scores was 62.2% (188/302). However, only 26% (80/306) of patients had been diagnosed previously as bipolar. In contrast, when DSM-IV criteria were used, only 13.7% (42/306) of patients qualified as bipolar. A number of factors were highly predictive of bipolarity including: seasonality, number of past mood episodes, history of psychiatric hospitalization, mixed state, and mood reactivity. Of the comorbidities examined, only borderline personality disorder occurred at a higher rate in bipolar than in unipolar patients. LIMITATIONS Participating centers were not randomly selected and there could be a bias if only psychiatrists having specific interest in BPD were included. CONCLUSIONS The positive HCL-32-R2-based bipolar screen rate of 62% suggests that a substantial proportion of patients with a MDE may have BPD. Further, a number of factors in the patient's psychiatric history as well as clinical aspects of the episode itself may signal an increased likelihood of bipolarity.
Collapse
Affiliation(s)
- Tarek Okasha
- Okasha Institute of Psychiatry, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
| | | | | | | | | |
Collapse
|
28
|
Hickie IB, Naismith SL, Robillard R, Scott EM, Hermens DF. Manipulating the sleep-wake cycle and circadian rhythms to improve clinical management of major depression. BMC Med 2013; 11:79. [PMID: 23521808 PMCID: PMC3760618 DOI: 10.1186/1741-7015-11-79] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 03/01/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Clinical psychiatry has always been limited by the lack of objective tests to substantiate diagnoses and a lack of specific treatments that target underlying pathophysiology. One area in which these twin failures has been most frustrating is major depression. Due to very considerable progress in the basic and clinical neurosciences of sleep-wake cycles and underlying circadian systems this situation is now rapidly changing. DISCUSSION The development of specific behavioral or pharmacological strategies that target these basic regulatory systems is driving renewed clinical interest. Here, we explore the extent to which objective tests of sleep-wake cycles and circadian function - namely, those that measure timing or synchrony of circadian-dependent physiology as well as daytime activity and nighttime sleep patterns - can be used to identify a sub-class of patients with major depression who have disturbed circadian profiles. SUMMARY Once this unique pathophysiology is characterized, a highly personalized treatment plan can be proposed and monitored. New treatments will now be designed and old treatments re-evaluated on the basis of their effects on objective measures of sleep-wake cycles, circadian rhythms and related metabolic systems.
Collapse
Affiliation(s)
- Ian B Hickie
- Clinical Research Unit, Brain & Mind Research Institute, University of Sydney, 100 Mallett St, Camperdown, NSW, 2050, Australia
| | - Sharon L Naismith
- Clinical Research Unit, Brain & Mind Research Institute, University of Sydney, 100 Mallett St, Camperdown, NSW, 2050, Australia
| | - Rébecca Robillard
- Clinical Research Unit, Brain & Mind Research Institute, University of Sydney, 100 Mallett St, Camperdown, NSW, 2050, Australia
| | - Elizabeth M Scott
- Clinical Research Unit, Brain & Mind Research Institute, University of Sydney, 100 Mallett St, Camperdown, NSW, 2050, Australia
- School of Medicine, The University of Notre Dame, 160 Oxford St, Darlinghurst, Sydney, NSW, 2010, Australia
| | - Daniel F Hermens
- Clinical Research Unit, Brain & Mind Research Institute, University of Sydney, 100 Mallett St, Camperdown, NSW, 2050, Australia
| |
Collapse
|
29
|
Seasonality and sleep: a clinical study on euthymic mood disorder patients. DEPRESSION RESEARCH AND TREATMENT 2012; 2012:978962. [PMID: 22203895 PMCID: PMC3235681 DOI: 10.1155/2012/978962] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Revised: 09/27/2011] [Accepted: 10/17/2011] [Indexed: 11/24/2022]
Abstract
Background. Research on mood disorders has progressively focused on the study of seasons and on the mood in association with them during depressive or manic episodes yet few studies have focused on the seasonal fluctuation that characterizes the patient's clinical course both during an illness episode and during euthymic periods. Methods. 113 euthymic outpatients 46 affected by major recurrent depression and 67 affected by bipolar disorder were recruited. We evaluated the impact of clinical "rhythmical" factors: seasonality, sleep disturbance, and chronotype. Patients completed the SPAQ+ questionnaire, the MEQ questionnaire, and the medical outcomes study (MOS) sleep scale. We used t-test analyses to compare differences of clinical "rhythmical" and sociodemographic variables and of differences in the assessment scales among the diagnostic groups. Results. Patients reporting a family history for mood disorders have higher fluctuations throughout seasons. Sleep disturbance is more problematic in unipolars when compared to bipolars. Conclusions. Sleep, light, and seasonality seem to be three interconnected features that lie at the basis of chronobiology that, when altered, have an important effect both on the psychopathology and on the treatment of mood disorders.
Collapse
|
30
|
Abstract
Cyclical mood disorders characterized by shifting affective states include bipolar disorder, seasonal affective disorder, and premenstrual syndrome/premenstrual dysphoric disorder. In this article, we explore the relationship between these disorders and bring the reader up to date on the advances made in the past year in understanding the relationship between bipolar disorder, seasonality, and premenstrual symptoms.
Collapse
|
31
|
Dumlu K, Orhon Z, Özerdem A, Tural U, Ulaş H, Tunca Z. Treatment-induced manic switch in the course of unipolar depression can predict bipolarity: cluster analysis based evidence. J Affect Disord 2011; 134:91-101. [PMID: 21742381 DOI: 10.1016/j.jad.2011.06.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 06/16/2011] [Accepted: 06/16/2011] [Indexed: 10/18/2022]
Abstract
BACKGROUND Antidepressants are known to induce manic switch in patients with depression. Treatment-induced mania is not considered as bipolar disorder in DSM IV. The aim of this study was to assess whether clinical characteristics of patients with unipolar depression with a history of treatment-induced mania were similar to those of patients with bipolar disorder. METHOD The study included 217 consecutive patients with DSM-IV mood disorders, diagnosed as: bipolar disorder type I (BP-I, n = 58) or type II (BP-II, n = 18) whose first episodes were depression, recurrent (unipolar) major depressive disorder with a history of antidepressant treatment-induced mania (switchers = sUD; n = 61) and without such an event (rUD; n = 80). First, the groups were compared with regard to clinical features and course specifiers using variance and chi-square analysis. Variables that differed significantly between the four groups were included in two-step cluster analysis to explore naturally occurring subgroups in all diagnoses. Subsequently, the relationship between the naturally occurring clusters and pre-defined DSM-IV diagnoses were investigated. RESULTS Two-step cluster analysis revealed two different naturally occurring groups. Higher severity of depressive episodes, with higher rate of melancholic features, higher number of hospitalization and suicide attempts were represented in one cluster where switchers (77%), bipolar I (94.8%) and II (83.3%) patients clustered together. CONCLUSION The findings of this study confirm that treatment-induced mania is a clinical phenomenon that belongs within the bipolar spectrum rather than a coincidental treatment complication, and that it should be placed under "bipolar disorders" in future classification systems. LIMITATIONS The study includes the limitations of any naturalistic retrospective study.
Collapse
Affiliation(s)
- Kemal Dumlu
- Department of Psychiatry, Dokuz Eylul University, School of Medicine, Izmir, Turkey
| | | | | | | | | | | |
Collapse
|
32
|
Murray G, Lam RW, Beaulieu S, Sharma V, Cervantes P, Parikh SV, Yatham LN. Do symptoms of bipolar disorder exhibit seasonal variation? A multisite prospective investigation. Bipolar Disord 2011; 13:687-95. [PMID: 22085482 DOI: 10.1111/j.1399-5618.2011.00959.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Evidence that symptoms of bipolar disorder (BD) vary seasonally is inconclusive. Here, a multisite prospective investigation of patients with BD was used to test the hypothesis that, on average, depressive symptoms peak in autumn/winter and hypo/manic symptoms peak in spring/summer. Secondary analyses explored gender and diagnosis [bipolar I disorder (BD-I) versus bipolar II disorder (BD-II)] effects on seasonality. METHODS A sample of 429 patients with BD (61.6% female; 56.2% BD-I) were recruited from 12 sites across Canada. Clinician-rated measures of manic [Young Mania Rating Scale (YMRS), n = 4,753 total observations] and depression symptoms [Montgomery-Åsberg Depression Rating Scale (MADRS), n = 4,691 observations] were taken at scheduled three-month visits as well as any unscheduled visits. At scheduled visits only, Hamilton Depression Rating Scale (Ham-D) assessments (n = 3,153 observations) were also made. Multi-level modeling (MLM) analyses were conducted separately for the three dependent variables and three definitions of Time: calendar month, nominal season, and harmonic analysis. RESULTS Primary analyses of the whole sample found that for manic symptoms (YMRS), neither calendar month nor nominal season were significant, and harmonic analyses found an unpredicted frequency two sinusoid, with peaks at 4th December and 4th June (p < 0.018). Secondary analyses found that this sinusoid approximately fit the YMRS data for females and those diagnosed with BD-II. For depression symptoms measured on the MADRS and Ham-D, no significant seasonal patterns were found in primary analyses of the whole sample. Secondary analyses found a significant increase in MADRS scores in November/December among females, but this pattern was not corroborated in nominal season or harmonic analyses. CONCLUSIONS No evidence of systematic seasonal variation in symptoms was found in the sample as a whole. Primary analyses found no evidence that hypo/manic symptoms peaked in the lighter months and depressive symptoms peaked in the darker months. The present findings align with broadly negative conclusions from three earlier prospective investigations, and provide the strongest evidence to date that seasonal changes do not in fact cause coordinated variation in BD symptoms.
Collapse
Affiliation(s)
- Greg Murray
- Faculty of Life and Social Sciences, Swinburne University of Technology, Hawthorn, Victoria, Australia.
| | | | | | | | | | | | | |
Collapse
|
33
|
Manning JS. Tools to improve differential diagnosis of bipolar disorder in primary care. PRIMARY CARE COMPANION TO THE JOURNAL OF CLINICAL PSYCHIATRY 2011; 12:17-22. [PMID: 20628502 DOI: 10.4088/pcc.9064su1c.03] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Among patients seen in a primary care setting for depressive and/or anxiety symptoms, 20% to 30% are estimated to have bipolar disorder. Although relatively common in primary care settings, bipolar disorder is still underrecognized, primarily due to misdiagnosis as unipolar depression. Patients often seek treatment when they are depressed but uncommonly present with mania or hypomania, the specific markers of bipolar spectrum disorders. An awareness of the prevalence, characteristics, and predictors of bipolar disorder can help the primary care physician to properly differentiate between bipolar depression and unipolar depression. Completing a differential diagnosis of bipolar disorder requires obtaining a comprehensive patient history that investigates symptom phenomenology and associated features, family history, longitudinal course of illness, and prior treatment response. In addition to the clinical interview, the Mood Disorder Questionnaire and the World Health Organization Composite International Diagnostic Interview 3.0 can be useful tools for evaluating patients for bipolar disorder. Screening patients at risk for bipolar disorder will help to avoid the use of unproductive or possibly even harmful treatments.
Collapse
Affiliation(s)
- J Sloan Manning
- Department of Family Medicine, University of North Carolina, Chapel Hill, and the Moses Cone Family Practice Residency and private practice, Greensboro, North Carolina
| |
Collapse
|
34
|
Simonsen H, Shand AJ, Scott NW, Eagles JM. Seasonal symptoms in bipolar and primary care patients. J Affect Disord 2011; 132:200-8. [PMID: 21429586 DOI: 10.1016/j.jad.2011.02.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 02/17/2011] [Accepted: 02/17/2011] [Indexed: 11/28/2022]
Abstract
BACKGROUND There is evidence of seasonality in bipolar affective disorder (BAD) and the preponderance of atypical symptoms in bipolar depressive episodes is also seen in winter type Seasonal Affective Disorder. Differences in seasonal symptoms between BAD and appropriate comparison populations have been scrutinised only in small studies. METHODS Symptoms described on the Seasonal Pattern Assessment Questionnaire (SPAQ) were compared between 183 patients with BAD and 468 patients consulting their general practitioners. Statistical analyses were adjusted for differing age and gender distributions between the two groups. RESULTS Compared with the general practice patients, subjects with BAD reported greater seasonal fluctuations in mood (p=0.003). On one measure BAD subjects reported increased seasonal changes in social activity (p<0.001) and greater weight fluctuation over the year (p=0.001). The most striking differences were in sleep patterns; BAD subjects slept significantly more throughout the year, and slept for a mean of 1.8h more in winter than in summer (versus a 1.0h difference in the general practice group, p<0.001). Against 20% of the general practice group, 46% of BAD patients rated seasonal changes in well-being to be at least a moderate problem. LIMITATIONS The SPAQ was designed as a screening instrument for Seasonal Affective Disorder, not for studies of this nature. Some of the reported differences, notably in social activity and weight changes, may reflect secondary psychosocial effects of BAD. CONCLUSIONS Seasonal changes, most notably winter hypersomnia, should be identified in patients with BAD. These symptoms may respond to treatments such as light therapy that are used in recurrent winter depression.
Collapse
|
35
|
Shand AJ, Scott NW, Anderson SM, Eagles JM. The seasonality of bipolar affective disorder: comparison with a primary care sample using the Seasonal Pattern Assessment Questionnaire. J Affect Disord 2011; 132:289-92. [PMID: 21377212 DOI: 10.1016/j.jad.2011.02.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 02/08/2011] [Accepted: 02/16/2011] [Indexed: 10/18/2022]
Abstract
BACKGROUND In contrast with recurrent unipolar depression, relatively little is known about the seasonality of depressive episodes in bipolar affective disorder (BAD). METHOD We compared responses on the Seasonal Pattern Assessment Questionnaire (SPAQ) between a cohort of 183 patients with BAD and a large sample of patients in primary care (N=4746). Comparisons were adjusted for age and gender. RESULTS 27% of the BAD patients fulfilled SPAQ criteria for Seasonal Affective Disorder (SAD. This gave an adjusted odds ratio of 3.73 (95% confidence intervals 2.64 to 5.27) in comparison with the rate among the primary care samples. Global seasonality scores were significantly higher among BAD patients (adjusted mean difference 1.73, 95% CI 0.97 to 2.49, p<0.001). LIMITATIONS The SPAQ was originally designed as a screening instrument rather than as a case-finding instrument. CONCLUSIONS Vigilance for seasonal symptom recurrence in BAD may be important with regard to management and relapse prevention.
Collapse
|
36
|
Vigod SN, Levitt AJ. Seasonal severity of depressive symptoms as a predictor of health service use in a community-based sample. J Psychiatr Res 2011; 45:612-8. [PMID: 20980021 DOI: 10.1016/j.jpsychires.2010.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 09/24/2010] [Accepted: 10/05/2010] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To determine whether severity of seasonal depressive symptoms is an independent predictor of depression-specific health service use. METHODS Cross-sectional telephone survey evaluating mood-related symptom changes across seasons using a structured interview based on the World Mental Health Composite International Diagnostic Interview, in a community sample representative of the province of Ontario, Canada (N = 1605). This study focuses on the 625 individuals (out of a total of 1605 interviewed) who screened positive for lifetime depressive symptoms. Severity of seasonal symptoms of depression (or "seasonality") was measured using the Seasonal Depression Severity (SDS) score (range 0-36). The primary outcome was lifetime depression-specific use of health services from a physician (family physician or psychiatrist). Lifetime psychotropic medication use, use of health services from a non-physician therapist, and psychiatric hospitalization were secondary outcomes. Other important variables that are known to predict depression-specific health service use were considered in multivariable analysis. RESULTS In our sample of individuals with depressive symptoms, those who had used physician health services had higher SDS scores than non-users (11.5 (SD 7.2) vs. 9.7 (SD 6.4), t(616) = 3.182, P = 0.001). In multivariable analysis, SDS score was independently associated with depression-specific health service use by a physician (OR = 1.04, 95% CI 1.01-1.07, p = 0.004). The relationship between seasonality and use of psychotropic medication use was similar (OR = 1.04, 95% CI 1.01-1.07, p = 0.007). CONCLUSIONS Seasonality was independently associated with depression-specific health service use for individuals with depressive symptoms. The results imply that greater seasonality may independently reflect increased severity and need for treatment of depression.
Collapse
Affiliation(s)
- Simone N Vigod
- Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.
| | | |
Collapse
|
37
|
Sylvén SM, Papadopoulos FC, Olovsson M, Ekselius L, Poromaa IS, Skalkidou A. Seasonality patterns in postpartum depression. Am J Obstet Gynecol 2011; 204:413.e1-6. [PMID: 21439544 DOI: 10.1016/j.ajog.2011.01.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Accepted: 01/14/2011] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To investigate the possible association between postpartum depressive symptoms and season of delivery. STUDY DESIGN During 1 year, delivering women in the Uppsala University Hospital were asked to participate in the study by filling out 3 postpartum questionnaires containing the Edinburgh Postnatal Depression scale and questions assessing life style, medical history, breastfeeding, and social support. RESULTS Two thousand three hundred eighteen women participated. Women delivering in the last 3 months of the year had a significantly higher risk of self-reported depressive symptomatology both at 6 weeks (odds ratio, 2.02, 95% confidence interval, 1.32-3.10) and at 6 months after delivery (odds ratio, 1.82, 95% confidence interval, 1.15-2.88), in comparison to those delivering April-June, both before and after adjustment for possible confounders. CONCLUSION Women delivering during the last quartile of the year had a significantly higher risk for depressive symptoms 6 weeks and 6 months postpartum and would thus benefit from a closer support and follow-up after delivery.
Collapse
Affiliation(s)
- Sara M Sylvén
- Department of Women's and Children's Health, Uppsala University, Sweden
| | | | | | | | | | | |
Collapse
|
38
|
Choi J, Baek JH, Noh J, Kim JS, Choi JS, Ha K, Kwon JS, Hong KS. Association of seasonality and premenstrual symptoms in bipolar I and bipolar II disorders. J Affect Disord 2011; 129:313-6. [PMID: 20719394 DOI: 10.1016/j.jad.2010.07.030] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 07/22/2010] [Accepted: 07/23/2010] [Indexed: 10/19/2022]
Abstract
BACKGROUND Although seasonal affective disorder and premenstrual syndrome (PMS) are frequently observed in mood disorders, little is known as to whether lifetime traits of seasonality and premenstrual distress are related to bipolar disorder independent of mood episodes. This study aimed at investigating these two cyclic traits with respect to bipolar I and II disorders as well as evaluating the association between them. METHODS Subjects included 61 female patients with bipolar I or II disorders and 122 healthy women. Seasonality and premenstrual symptoms were measured retrospectively on a lifetime basis using the Seasonal Pattern Assessment Questionnaire (SPAQ) and the Premenstrual Symptoms Screening Tool (PSST). RESULTS Patients showed higher global seasonality scores on the SPAQ compared to the normal controls. Further, the patient-control difference was more prominent in cases of bipolar II disorder (p<0.0001) than in bipolar I disorder (p=0.001). The prevalence of moderate to severe PMS as indicated on the PSST was also significantly higher in bipolar II disorder patients (51.6%) as compared to controls (19.7%). A significant association between seasonality and PMS was observed in both patient and control groups. CONCLUSIONS The results suggested that female patients with bipolar disorder experience seasonal and premenstrual changes in mood and behavior regardless of their mood episodes, and traits of seasonality and PMS are associated with each other. A common biological mechanism of these two cyclic conditions may be involved in the development of the cyclicity of bipolar disorder.
Collapse
Affiliation(s)
- Jungmi Choi
- Department of Psychiatry, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Rajajärvi E, Antila M, Kieseppä T, Lönnqvist J, Tuulio-Henriksson A, Partonen T. The effect of seasons and seasonal variation on neuropsychological test performance in patients with bipolar I disorder and their first-degree relatives. J Affect Disord 2010; 127:58-65. [PMID: 20466433 DOI: 10.1016/j.jad.2010.04.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 04/19/2010] [Accepted: 04/22/2010] [Indexed: 10/19/2022]
Abstract
BACKGROUND Bipolar disorder (BD) patients have cognitive deficits that may remain in the euthymic phase. Similar although milder cognitive deficits may be found in their first-degree relatives. We wanted to analyze whether the self-report of seasonality, the season when individuals were tested or the circadian preference influences the neuropsychological test performance measured in the familial BD, type I, patients and their healthy first-degree relatives. METHOD A structured diagnostic interview (SCID) and neuropsychological test battery were administered to 32 familial BD type I patients, 40 of their unaffected first-degree relatives and 50 controls, all from population-based samples. BD patients and their relatives filled in the Seasonal Pattern Assessment Questionnaire (SPAQ) and the Horne-Östberg Morningness-Eveningness Questionnaire (MEQ). RESULTS Individuals, who reported that seasonal variation was a problem, scored worse on the measures of visuoconstructional functions, visuospatial reasoning, auditory attention and working memory, and verbal memory than those with no seasonal variation. The season when tested had an influence on test performance. Individuals from the families that were tested in spring, summer and autumn scored better than those tested in winter on the measures of visual and verbal attention, working memory, verbal ability, verbal fluency, and executive functioning. Among the controls there was no difference in the test scores from season to season. The circadian preference had no effect on test performance. LIMITATIONS Only relatives, not BD patients were tested in winter. CONCLUSION Seasonal variation in mood and behavior as a problem in patients and their first-degree relatives influences negatively the neuropsychological test performance. In addition, among the patients and first-degree relatives the neuropsychological test performance in winter may be worse than in other seasons.
Collapse
Affiliation(s)
- Elina Rajajärvi
- Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland.
| | | | | | | | | | | |
Collapse
|
40
|
Jones SG, Paletz EM, Obermeyer WH, Hannan CT, Benca RM. Seasonal influences on sleep and executive function in the migratory White-crowned Sparrow (Zonotrichia leucophrys gambelii). BMC Neurosci 2010; 11:87. [PMID: 20670404 PMCID: PMC2923628 DOI: 10.1186/1471-2202-11-87] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Accepted: 07/29/2010] [Indexed: 01/25/2023] Open
Abstract
Background We have previously shown that the White-crowned Sparrow (WCS) decreases sleep by 60% during a period of migratory restlessness relative to a non-migratory period when housed in a 12 h light: 12 h dark cycle. Despite this sleep reduction, accuracy of operant performance was not impaired, and in fact rates of responding were elevated during the migratory period, effects opposite to those routinely observed following enforced sleep deprivation. To determine whether the previously observed increases in operant responding were due to improved performance or to the effects of migration on activity level, here we assessed operant performance using a task in which optimal performance depends on the bird's ability to withhold a response for a fixed interval of time (differential-reinforcement-of-low-rate-behavior, or DRL); elevated response rates ultimately impair performance by decreasing access to food reward. To determine the influence of seasonal changes in day length on sleep and behavioral patterns, we recorded sleep and assessed operant performance across 4 distinct seasons (winter, spring, summer and fall) under a changing photoperiod. Results Sleep amount changed in response to photoperiod in winter and summer, with longest sleep duration in the winter. Sleep duration in the spring and fall migratory periods were similar to what we previously reported, and were comparable to sleep duration observed in summer. The most striking difference in sleep during the migratory periods compared to non-migratory periods was the change from discrete day-night temporal organization to an almost complete temporal fragmentation of sleep. The birds' ability to perform on the DRL task was significantly impaired during both migratory periods, but optimal performance was sustained during the two non-migratory periods. Conclusions Birds showed dramatic changes in sleep duration across seasons, related to day length and migratory status. Migration was associated with changes in sleep amount and diurnal distribution pattern, whereas duration of sleep in the non-migratory periods was largely influenced by the light-dark cycle. Elevated response rates on the DRL task were observed during migration but not during the short sleep duration of summer, suggesting that the migratory periods may be associated with decreased inhibition/increased impulsivity. Although their daily sleep amounts and patterns may vary by season, birds are susceptible to sleep loss throughout the year, as evidenced by decreased responding rates following enforced sleep deprivation.
Collapse
Affiliation(s)
- Stephanie G Jones
- Department of Psychiatry, University of Wisconsin, Madison 6001 Research Park Blvd, Madison, WI 53719, USA.
| | | | | | | | | |
Collapse
|
41
|
Utge SJ, Soronen P, Loukola A, Kronholm E, Ollila HM, Pirkola S, Porkka-Heiskanen T, Partonen T, Paunio T. Systematic analysis of circadian genes in a population-based sample reveals association of TIMELESS with depression and sleep disturbance. PLoS One 2010; 5:e9259. [PMID: 20174623 PMCID: PMC2823770 DOI: 10.1371/journal.pone.0009259] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 01/27/2010] [Indexed: 11/28/2022] Open
Abstract
Disturbances in the circadian pacemaker system are commonly found in individuals with depression and sleep-related problems. We hypothesized that some of the canonical circadian clock genes would be associated with depression accompanied by signs of disturbed sleep, early morning awakening, or daytime fatigue. We tested this hypothesis in a population-based sample of the Health 2000 dataset from Finland, including 384 depressed individuals and 1270 controls, all with detailed information on sleep and daytime vigilance, and analyzed this set of individuals with regard to 113 single-nucleotide polymorphisms of 18 genes of the circadian system. We found significant association between TIMELESS variants and depression with fatigue (D+FAT+) (rs7486220: pointwise P = 0.000099, OR = 1.66; corrected empirical P for the model of D+FAT+ = 0.0056; haplotype 'C-A-A-C' of rs2291739-rs2291738-rs7486220-rs1082214: P = 0.0000075, OR = 1.72) in females, and association to depression with early morning awakening (D+EMA+) (rs1082214: pointwise P = 0.0009, OR = 2.70; corrected empirical P = 0.0374 for the model D+EMA+; haplotype 'G-T' of rs7486220 and rs1082214: P = 0.0001, OR = 3.01) in males. There was significant interaction of gender and TIMELESS (for example with rs1082214, P = 0.000023 to D+EMA+ and P = 0.005 to D+FAT+). We obtained supported evidence for involvement of TIMELESS in sleeping problems in an independent set of control individuals with seasonal changes in mood, sleep duration, energy level and social activity in females (P = 0.036, = 0.123 for rs1082214) and with early morning awakening or fatigue in males (P = 0.038 and P = 0.0016, respectively, for rs1082214). There was also some evidence of interaction between TIMELESS and PER1 in females to D+FAT+ as well as between TIMELESS and ARNTL, RORA or NR1D1 in males to D+EMA+. These findings support a connection between circadian genes and gender-dependent depression and defective sleep regulation.
Collapse
Affiliation(s)
- Siddheshwar J. Utge
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Department of Physiology, University of Helsinki, Helsinki, Finland
- Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| | - Pia Soronen
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| | - Anu Loukola
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| | - Erkki Kronholm
- Department of Chronic Disease Prevention, Population Studies Unit, National Institute for Health and Welfare, Turku, Finland
| | - Hanna M. Ollila
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Department of Physiology, University of Helsinki, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| | - Sami Pirkola
- Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
- Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland
| | | | - Timo Partonen
- Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland
| | - Tiina Paunio
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| |
Collapse
|
42
|
Benca R, Duncan MJ, Frank E, McClung C, Nelson RJ, Vicentic A. Biological rhythms, higher brain function, and behavior: Gaps, opportunities, and challenges. ACTA ACUST UNITED AC 2009; 62:57-70. [PMID: 19766673 DOI: 10.1016/j.brainresrev.2009.09.005] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2009] [Revised: 09/14/2009] [Accepted: 09/15/2009] [Indexed: 10/20/2022]
Abstract
Increasing evidence suggests that disrupted temporal organization impairs behavior, cognition, and affect; further, disruption of circadian clock genes impairs sleep-wake cycle and social rhythms which may be implicated in mental disorders. Despite this strong evidence, a gap in understanding the neural mechanisms of this interaction obscures whether biological rhythms disturbances are the underlying causes or merely symptoms of mental disorder. Here, we review current understanding, emerging concepts, gaps, and opportunities pertinent to (1) the neurobiology of the interactions between circadian oscillators and the neural circuits subserving higher brain function and behaviors of relevance to mental health, (2) the most promising approaches to determine how biological rhythms regulate brain function and behavior under normal and pathological conditions, (3) the gaps and challenges to advancing knowledge on the link between disrupted circadian rhythms/sleep and psychiatric disorders, and (4) the novel strategies for translation of basic science discoveries in circadian biology to clinical settings to define risk, prevent or delay onset of mental illnesses, design diagnostic tools, and propose new therapeutic strategies. The review is organized around five themes pertinent to (1) the impact of molecular clocks on physiology and behavior, (2) the interactions between circadian signals and cognitive functions, (3) the interface of circadian rhythms with sleep, (4) a clinical perspective on the relationship between circadian rhythm abnormalities and affective disorders, and (5) the pre-clinical models of circadian rhythm abnormalities and mood disorders.
Collapse
Affiliation(s)
- Ruth Benca
- Department of Psychology and Psychiatry, University of Wisconsin-Madison, 53792, USA
| | | | | | | | | | | |
Collapse
|
43
|
Bauer M, Glenn T, Grof P, Rasgon NL, Marsh W, Sagduyu K, Alda M, Murray G, Quiroz D, Malliaris Y, Sasse J, Pilhatsch M, Whybrow PC. Relationship among latitude, climate, season and self-reported mood in bipolar disorder. J Affect Disord 2009; 116:152-7. [PMID: 19091424 DOI: 10.1016/j.jad.2008.11.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2008] [Revised: 11/16/2008] [Accepted: 11/16/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Many researchers have analyzed seasonal variation in hospital admissions for bipolar disorder with inconsistent results. We investigated if a seasonal pattern was present in daily self-reported daily mood ratings from patients living in five climate zones in the northern and southern hemispheres. We also investigated the influence of latitude and seasonal climate variables on mood. METHOD 360 patients who were receiving treatment as usual recorded mood daily (59,422 total days of data). Both the percentage of days depressed and hypomanic/manic, and the episodes of depression and mania were determined. The observations were provided by patients from different geographic locations in North and South America, Europe and Australia. These data were analyzed for seasonality by climate zone using both a sinusoidal regression and the Gini index. Additionally, the influence of latitude and climate variables on mood was estimated using generalized linear models for each season and month. RESULTS No seasonality was found in any climate zone by either method. In spite of vastly different weather, neither latitude nor climate variables were associated with mood by season or month. CONCLUSION Daily self-reported mood ratings of most patients with bipolar disorder did not show a seasonal pattern. Neither climate nor latitude has a primary influence on the daily mood changes of most patients receiving medication for bipolar disorder.
Collapse
Affiliation(s)
- Michael Bauer
- Department of Psychiatry and Psychotherapy, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Germany Fetscherstr. 74, 01307 Dresden, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
|
45
|
Hamilton SL, Clemes SA, Griffiths PL. UK adults exhibit higher step counts in summer compared to winter months. Ann Hum Biol 2008; 35:154-69. [PMID: 18428010 DOI: 10.1080/03014460801908058] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
BACKGROUND Seasonal differences in step counts have been observed in a limited number of studies conducted on US adults. Due to the diverse global climate, assessment and interpretation of seasonal patterns in ambulatory activity may vary between countries, and regionally specific studies are necessary to understand global patterns. Currently, no studies have assessed whether a seasonal trend is present when ambulatory activity is measured objectively in adults living in the UK. AIM The present study investigated whether pedometer-determined step counts of adults living in the UK vary between summer and winter. SUBJECTS AND METHODS Ninety-six adults (52% male, age = 41.0 +/- 12.3 years, BMI = 26.1 +/- 5.1 kg m(-2)) completed a within-subject bi-seasonal pedometer study. All participants completed two 4-week monitoring periods; one during the summer and one the following winter. The same Yamax SW-200 pedometer was worn throughout waking hours during both seasons, and daily step counts were recorded in an activity log. Intra-individual seasonal changes in mean daily steps were analysed using a paired samples t-test. RESULTS Summer mean daily step counts (10 417 +/- 3055 steps day(-1)) were significantly higher than those reported during the winter (9132 +/- 2841 steps day(-1)) (p < 0.001). A follow-up study conducted the subsequent summer in a sub-sample (n = 28) reinforced this trend. Summer step counts were significantly higher than winter step counts on all days of the week (p < or = 0.001). A significant day of the week effect was present in both seasons, with step counts reported on a Sunday being on average 1500 steps day(-1) lower than those reported Monday through to Saturday. CONCLUSION Step counts in the sample of UK adults surveyed decreased significantly in the winter compared to the summer, suggesting future pedometer surveillance studies should capture step counts throughout the year for a non-biased reflection of habitual ambulatory activity. Public health initiatives should target these seasonal differences, and opportunities should be provided that encourage individuals to increase their activity levels during the colder, darker months of the year.
Collapse
Affiliation(s)
- Sarah L Hamilton
- Department of Human Sciences, Loughborough University, Leicestershire, UK
| | | | | |
Collapse
|
46
|
Goikolea JM, Colom F, Martínez-Arán A, Sánchez-Moreno J, Giordano A, Bulbena A, Vieta E. Clinical and prognostic implications of seasonal pattern in bipolar disorder: a 10-year follow-up of 302 patients. Psychol Med 2007; 37:1595-1599. [PMID: 17537285 DOI: 10.1017/s0033291707000864] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND More than 20% of bipolar patients may present with seasonal pattern (SP). Seasonality can alter the course of bipolar disorder. However, to date, long-term follow-up studies of bipolar patients presenting with SP are scarce. We present a 10-year follow-up study comparing clinical and demographic features of bipolar patients with and without SP. METHOD Three hundred and twenty-five bipolar I and II patients were followed up for at least 10 years. SP was defined according to DSM-IV criteria. Clinical variables were obtained from structured interviews with the patients and their relatives. Patients with and without SP were compared regarding clinical and sociodemographic variables and a stepwise logistic regression was performed. RESULTS Seventy-seven patients (25.5%) were classified as presenting with SP, while 225 (74.5%) were considered as presenting with no significant seasonal variation. Twenty-three patients (7%) were excluded from the study because it was unclear whether they had seasonality or not. There were no differences between groups regarding demographic variables. Patients with SP predominantly presented with bipolar II disorder, depressive onset, and depressive predominant polarity. The greater burden of depression did not correlate with indirect indicators of severity, such as suicidality, hospitalizations or psychotic symptoms. CONCLUSIONS Our study links the presence of SP with both bipolar II disorder and predominant depressive component. However, we could not find any difference regarding functionality or hospitalization rates. Modifications in the criteria to define SP are suggested for a better understanding of bipolar disorder.
Collapse
Affiliation(s)
- J M Goikolea
- Bipolar Disorders Program, Clinical Institute of Neuroscience, Hospital Clinic, Institut d'Investigacions Biomédiques August Pi Sunyer, Barcelona Stanley Foundation Center, Spain
| | | | | | | | | | | | | |
Collapse
|
47
|
Wilting I, Fase S, Martens EP, Heerdink ER, Nolen WA, Egberts ACG. The impact of environmental temperature on lithium serum levels. Bipolar Disord 2007; 9:603-8. [PMID: 17845275 DOI: 10.1111/j.1399-5618.2007.00438.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Three studies have reported a seasonal variation in lithium serum levels, with higher levels during summer. Our objective was to investigate the impact of actual environmental temperature on lithium serum levels. METHODS A retrospective study was conducted using available records of lithium serum levels for the period between January 1995 and July 2004, obtained from three large teaching hospitals in The Netherlands. Lithium serum levels were linked to season and average daily temperature data obtained from the Royal Netherlands Meteorological Institute. An analysis was performed on all lithium serum levels not accounting for the intra-individual dependency of lithium serum levels. The association between season, temperature and both absolute lithium serum level and the frequency of potentially toxic serum levels was investigated. A mixed model analysis, accounting for intra-individual dependency of lithium serum levels, was performed. RESULTS A total of 41,102 lithium serum levels (3,054 patients) were included. A significant difference in mean lithium serum levels across seasons (p < 0.001) and temperature categories (p = 0.001) was found, peaking in summer [0.761 mmol/L, +/- standard error of the mean (SEM) 0.002] and at temperatures of 15-20 degrees C [0.762 mmol/L (+/- SEM 0.005)], and at a minimum in winter [0.748 mmol/L (+/- SEM 0.002)] and at <0 degrees C [0.741 mmol/L (+/- SEM 0.005)]. The relative frequency of potentially toxic serum levels significantly differed between seasons (p = 0.023, highest in winter), but not between temperature categories (p = 0.481). A significant positive association for intra-individual lithium serum level and season (p < 0.001) and temperature (p < 0.001) was established. CONCLUSIONS Season and environmental temperature have a statistically significant but therapeutically irrelevant effect on lithium serum levels.
Collapse
Affiliation(s)
- Ingeborg Wilting
- Department of Pharmacoepidemiology and Pharmacotherapy, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | | | | | | | | | | |
Collapse
|
48
|
Fu AZ, Liu GG, Christensen DB, Hansen RA. Effect of second-generation antidepressants on mania- and depression-related visits in adults with bipolar disorder: a retrospective study. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2007; 10:128-36. [PMID: 17391421 DOI: 10.1111/j.1524-4733.2006.00159.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
OBJECTIVE To assess the effect of second-generation antidepressants on mania-related and depression-related office visits for adults with bipolar disorder. METHODS Using a national managed-care claims database, we retrospectively identified continuously enrolled patients with bipolar disorder who had a new antidepressive prescription treatment between January 1998 and December 2002. Patients were followed for at least 12 months after the date of initial use of antidepressant monotherapy, mood stabilizer monotherapy, or antidepressant-mood stabilizer combination therapy. Logit models with propensity score matching were used to identify the relationship between treatment types and the likelihood of having mania-related visits within 12 months. Negative binomial models and Cox proportional hazard models were used to predict the number of depression-related visits and time to first mania- or depression-related visit. RESULTS Patients on antidepressant monotherapy and combination therapy did not have different likelihoods of mania-related visits compared with those on mood stabilizer monotherapy (with odds ratios (ORs) 0.67 (95% confidence interval (CI) 0.42-1.04) and 0.99 (95% CI 0.69-1.43), respectively). The numbers of depression-related visits for the same comparisons were significantly lower, with incidence rate ratios of 0.68 (95% CI 0.56-0.82) and 0.65 (95% CI 0.52-0.81), respectively. The results of time to first mania- or depression-related visit provided similar indications. CONCLUSIONS Second-generation antidepressant was associated with a decreased number of depression-related visits but was not associated with an increased risk of mania-related visits within a 1-year period. Although more work is needed to establish the safety and efficacy of second-generation antidepressants in treating bipolar depression, the evidence from this study supports a favorable risk-benefit profile.
Collapse
Affiliation(s)
- Alex Z Fu
- Department of Quantitative Health Sciences, The Cleveland Clinic, Cleveland, OH, USA.
| | | | | | | |
Collapse
|
49
|
Fu AZ, Dow WH, Liu GG. Propensity score and difference-in-difference methods: a study of second-generation antidepressant use in patients with bipolar disorder. HEALTH SERVICES AND OUTCOMES RESEARCH METHODOLOGY 2007. [DOI: 10.1007/s10742-006-0016-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
50
|
Corral M, Wardrop A, Zhang HB. Seasonality of symptoms in women with postpartum depression. Arch Womens Ment Health 2007; 10:9-13. [PMID: 17165099 DOI: 10.1007/s00737-006-0160-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2006] [Accepted: 10/01/2006] [Indexed: 11/25/2022]
Abstract
It is important to consider the potential contribution of seasonality to postpartum depression (PPD; Hiltunen et al, 2004). A possible link between seasonality and PPD may have implications for not only choice of treatment, but also in considering pregnancy planning. The objectives of this pilot study were to examine whether women with seasonal mood changes demonstrated greater incidence of PPD, and to determine if seasonality scores were predictive of PPD. The Seasonal Pattern Assessment Questionnaire (SPAQ; Rosenthal et al, 1987) was used to assess seasonality of mood. A logistic regression analysis was conducted to determine the association between clinical factors, SAD diagnosis, SPAQ global seasonality score (GSS) and season of SPAQ administration and PPD. In our sample, twice as many women in the PPD group were found to have SAD compared to the control group. The PPD group also had a higher group GSS mean (10.44) than did the control group (8.84). However, logistic regression analysis showed that higher seasonality scores in women with PPD were not necessarily predictive of PPD. While more women in the PPD group reported increased seasonal weight fluctuation and less sleep in the spring and summer, these items alone did not predict depression after childbirth.
Collapse
Affiliation(s)
- M Corral
- Reproductive Mental Health Program, St. Paul's Hospital, Vancouver, B.C., Canada.
| | | | | |
Collapse
|