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Cornish RP, Magnus MC, Urhoj SK, Santorelli G, Smithers LG, Odd D, Fraser A, Håberg SE, Nybo Andersen AM, Birnie K, Lynch JW, Tilling K, Lawlor DA. Maternal pre-pregnancy body mass index and risk of preterm birth: a collaboration using large routine health datasets. BMC Med 2024; 22:10. [PMID: 38178112 PMCID: PMC10768428 DOI: 10.1186/s12916-023-03230-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 12/13/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Preterm birth (PTB) is a leading cause of child morbidity and mortality. Evidence suggests an increased risk with both maternal underweight and obesity, with some studies suggesting underweight might be a greater factor in spontaneous PTB (SPTB) and that the relationship might vary by parity. Previous studies have largely explored established body mass index (BMI) categories. Our aim was to compare associations of maternal pre-pregnancy BMI with any PTB, SPTB and medically indicated PTB (MPTB) among nulliparous and parous women across populations with differing characteristics, and to identify the optimal BMI with lowest risk for these outcomes. METHODS We used three UK datasets, two USA datasets and one each from South Australia, Norway and Denmark, together including just under 29 million pregnancies resulting in a live birth or stillbirth after 24 completed weeks gestation. Fractional polynomial multivariable logistic regression was used to examine the relationship of maternal BMI with any PTB, SPTB and MPTB, among nulliparous and parous women separately. The results were combined using a random effects meta-analysis. The estimated BMI at which risk was lowest was calculated via differentiation and a 95% confidence interval (CI) obtained using bootstrapping. RESULTS We found non-linear associations between BMI and all three outcomes, across all datasets. The adjusted risk of any PTB and MPTB was elevated at both low and high BMIs, whereas the risk of SPTB was increased at lower levels of BMI but remained low or increased only slightly with higher BMI. In the meta-analysed data, the lowest risk of any PTB was at a BMI of 22.5 kg/m2 (95% CI 21.5, 23.5) among nulliparous women and 25.9 kg/m2 (95% CI 24.1, 31.7) among multiparous women, with values of 20.4 kg/m2 (20.0, 21.1) and 22.2 kg/m2 (21.1, 24.3), respectively, for MPTB; for SPTB, the risk remained roughly largely constant above a BMI of around 25-30 kg/m2 regardless of parity. CONCLUSIONS Consistency of findings across different populations, despite differences between them in terms of the time period covered, the BMI distribution, missing data and control for key confounders, suggests that severe under- and overweight may play a role in PTB risk.
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Affiliation(s)
- R P Cornish
- Population Health Sciences, Bristol Medical School, University of Bristol, Oakfield House, Oakfield Road, Bristol, BS8 2BN, UK.
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK.
| | - M C Magnus
- Centre for Fertility and Health, Norwegian Institute of Public Health, Oslo, Norway
| | - S K Urhoj
- Department of Public Health, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - G Santorelli
- Bradford Institute for Health Research, Bradford Royal Infirmary, Bradford, UK
| | - L G Smithers
- School of Public Health, University of Adelaide, Adelaide, Australia
- School of Health and Society, University of Wollongong, Wollongong, Australia
| | - D Odd
- Division of Population Medicine, Cardiff University School of Medicine, Cardiff, UK
| | - A Fraser
- Population Health Sciences, Bristol Medical School, University of Bristol, Oakfield House, Oakfield Road, Bristol, BS8 2BN, UK
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - S E Håberg
- Centre for Fertility and Health, Norwegian Institute of Public Health, Oslo, Norway
| | - A M Nybo Andersen
- Department of Public Health, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - K Birnie
- Population Health Sciences, Bristol Medical School, University of Bristol, Oakfield House, Oakfield Road, Bristol, BS8 2BN, UK
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - J W Lynch
- Population Health Sciences, Bristol Medical School, University of Bristol, Oakfield House, Oakfield Road, Bristol, BS8 2BN, UK
- School of Public Health, University of Adelaide, Adelaide, Australia
| | - K Tilling
- Population Health Sciences, Bristol Medical School, University of Bristol, Oakfield House, Oakfield Road, Bristol, BS8 2BN, UK
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - D A Lawlor
- Population Health Sciences, Bristol Medical School, University of Bristol, Oakfield House, Oakfield Road, Bristol, BS8 2BN, UK
- MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
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Damkjær M, Garne E, Loane M, Urhoj SK, Ballardini E, Cavero‐Carbonell C, Coi A, García‐Villodre L, Given J, Gissler M, Heino A, Jordan S, Limb E, Neville AJ, Pierini A, Rissmann A, Tan J, Scanlon I, Morris JK. Timing of Cardiac Surgical Interventions and Postoperative Mortality in Children With Severe Congenital Heart Defects Across Europe: Data From the EUROlinkCAT Study. J Am Heart Assoc 2023; 12:e029871. [PMID: 38108249 PMCID: PMC10863769 DOI: 10.1161/jaha.122.029871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 10/11/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND The purpose of this study was to evaluate the timing of the first cardiac surgery, the number of cardiac surgeries performed, and 30-day postoperative mortality rate for children with severe congenital heart defects (sCHDs) in their first 5 years of life. METHODS AND RESULTS This was a population-based data linkage cohort study linking information from 9 European congenital anomaly registries to vital statistics and hospital databases. Data were extracted for 5693 children with sCHDs born from 1995 to 2004. Subgroup analyses were performed for specific types of sCHD. Children with sCHDs underwent their first surgical intervention at a median age of 3.6 (95% CI, 2.6-4.5) weeks. The timing of the first surgery for most subtypes of sCHD was consistent across Europe. In the first 5 years of life, children with hypoplastic left heart underwent the most cardiac surgeries, with a median of 4.4 (95% CI, 3.1-5.6). The 30-day postoperative mortality rate in children aged <1 year ranged from 1.1% (95% CI, 0.5%-2.1%) for tetralogy of Fallot to 23% (95% CI, 12%-37%) for Ebstein anomaly. The 30-day postoperative mortality rate was highest for children undergoing surgery in the first month of life. Overall 5-year survival for sCHD was <90% for all sCHDs, except transposition of the great arteries, tetralogy of Fallot, and coarctation of the aorta. CONCLUSIONS There were no major differences among the 9 regions in the timing, 30-day postoperative mortality rate, and number of operations performed for sCHD. Despite an overall good prognosis for most congenital heart defects, some lesions were still associated with substantial postoperative death.
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Affiliation(s)
- Mads Damkjær
- Department of Paediatrics and Adolescent Medicine, Lillebaelt HospitalUniversity Hospital of Southern DenmarkKoldingDenmark
- Department of Regional Health ResearchUniversity of Southern DenmarkOdenseDenmark
| | - Ester Garne
- Department of Paediatrics and Adolescent Medicine, Lillebaelt HospitalUniversity Hospital of Southern DenmarkKoldingDenmark
- Department of Regional Health ResearchUniversity of Southern DenmarkOdenseDenmark
| | - Maria Loane
- Faculty of Life & Health SciencesUlster UniversityNorthern IrelandUK
| | - Stine K. Urhoj
- Section of Epidemiology, Department of Public HealthUniversity of CopenhagenCopenhagenDenmark
| | - Elisa Ballardini
- Neonatal Intensive Care Unit, Paediatric Section, IMER Registry, Department of Medical SciencesUniversity of FerraraFerraraItaly
| | - Clara Cavero‐Carbonell
- Rare Diseases Research UnitFoundation for the Promotion of Health and Biomedical Research in the Valencian RegionValenciaSpain
| | - Alessio Coi
- Unit of Epidemiology of Rare Diseases and Congenital AnomaliesInstitute of Clinical Physiology, National Research CouncilPisaItaly
| | - Laura García‐Villodre
- Rare Diseases Research UnitFoundation for the Promotion of Health and Biomedical Research in the Valencian RegionValenciaSpain
| | - Joanne Given
- Faculty of Life & Health SciencesUlster UniversityNorthern IrelandUK
| | - Mika Gissler
- Department of Knowledge BrokersTHL Finnish Institute for Health and WelfareHelsinkiFinland
| | - Anna Heino
- Department of Knowledge BrokersTHL Finnish Institute for Health and WelfareHelsinkiFinland
| | - Sue Jordan
- Faculty of Medicine, Health and Life ScienceSwansea UniversitySwanseaUK
| | - Elizabeth Limb
- Population Health Research Institute, St George’sUniversity of LondonLondonUK
| | - Amanda J Neville
- Registro IMER ‐ IMER Registry (Emila Romagna Registry of Birth Defects), Center for Clinical and Epidemiological ResearchUniversity of Ferrara Azienda Ospedaliero‐Universitaria di FerraraFerraraItaly
| | - Anna Pierini
- Unit of Epidemiology of Rare Diseases and Congenital AnomaliesInstitute of Clinical Physiology, National Research CouncilPisaItaly
| | - Anke Rissmann
- Malformation Monitoring Centre Saxony‐AnhaltMedical Faculty Otto‐von‐Guericke‐University MagdeburgMagdeburgGermany
| | - Joachim Tan
- Population Health Research Institute, St George’sUniversity of LondonLondonUK
| | - Ieuan Scanlon
- Faculty of Medicine, Health and Life ScienceSwansea UniversitySwanseaUK
| | - Joan K Morris
- Population Health Research Institute, St George’sUniversity of LondonLondonUK
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Tan J, Glinianaia SV, Rankin J, Pierini A, Santoro M, Coi A, Garne E, Loane M, Given JE, Brigden J, Ballardini E, Cavero-Carbonell C, de Walle HEK, García-Villodre L, Gatt M, Gissler M, Heino A, Jordan S, Khoshnood B, Klungsoyr K, Lelong N, Lutke RL, Neville AJ, Tucker D, Urhoj SK, Wellesley D, Morris JK. Risk factors for mortality in infancy and childhood in children with major congenital anomalies: A European population-based cohort study. Paediatr Perinat Epidemiol 2023; 37:679-690. [PMID: 37817457 DOI: 10.1111/ppe.13010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/25/2023] [Accepted: 09/18/2023] [Indexed: 10/12/2023]
Abstract
BACKGROUND Preterm birth and young maternal age are known risk factors for infant and childhood mortality. There is limited knowledge of the impact of these risk factors in children born with major congenital anomalies (CAs), who have inherently higher risks of death compared with other children. OBJECTIVES To investigate the risk factors for mortality up to age 10 years in children born with specific major CAs. METHODS This population-based cohort study involved 150,198 livebirths from 1995 to 2014 in 13 European CA registries linked to mortality data. Cox proportional hazards models estimated the association of gestational age, maternal age and child's sex with death <1 year and 1-9 years for the whole cohort and by CA subgroup. Hazard ratios (HR) from each registry were pooled using multivariate meta-analysis. RESULTS Preterm birth had a dose-response association with mortality; compared with infants born at 37+ weeks gestation, those born at <28, 28-31 and 32-36 weeks had 14.88 (95% CI 12.57, 17.62), 8.39 (95% CI 7.16, 9.85) and 3.88 (95% CI 3.40, 4.43) times higher risk of death <1 year, respectively. The corresponding risks at 1-9 years were 4.99 (95% CI 2.94, 8.48), 3.09 (95% CI 2.28, 4.18) and 2.04 (95% CI 1.69, 2.46) times higher, respectively. Maternal age <20 years (versus 20-34 years) was a risk factor for death <1 year (HR 1.30, 95% CI 1.09, 1.54) and 1-9 years (HR 1.58, 95% CI 1.19, 2.10). Females had 1.22 (95% CI 1.07, 1.39) times higher risk of death between 1 and 9 years than males. CONCLUSION Preterm birth was associated with considerably higher infant and childhood mortality in children with CAs, comparable to estimates reported elsewhere for the background population. Additional risk factors included young maternal age and female sex. Information on risk factors could benefit clinical care and guide counselling of parents following CA diagnoses.
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Affiliation(s)
- Joachim Tan
- Population Health Research Institute, St George's University of London, London, UK
| | | | - Judith Rankin
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Anna Pierini
- Unit of Epidemiology of Rare Diseases and Congenital Anomalies, Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - Michele Santoro
- Unit of Epidemiology of Rare Diseases and Congenital Anomalies, Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - Alessio Coi
- Unit of Epidemiology of Rare Diseases and Congenital Anomalies, Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - Ester Garne
- Department of Paediatrics and Adolescent Medicine, Lillebaelt Hospital, University Hospital of Southern Denmark, Kolding, Denmark
| | - Maria Loane
- Faculty of Life and Health Sciences, Ulster University, Coleraine, UK
| | - Joanne E Given
- Faculty of Life and Health Sciences, Ulster University, Coleraine, UK
| | - Joanna Brigden
- Population Health Research Institute, St George's University of London, London, UK
| | - Elisa Ballardini
- Neonatal Intensive Care Unit, Paediatric Section, IMER Registry (Emilia Romagna Registry of Birth Defects), Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Clara Cavero-Carbonell
- Rare Diseases Research Unit, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region, Valencia, Spain
| | - Hermien E K de Walle
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Laura García-Villodre
- Rare Diseases Research Unit, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region, Valencia, Spain
| | - Miriam Gatt
- Malta Congenital Anomalies Registry, Directorate for Health Information and Research, Tal-Pietà, Malta
| | - Mika Gissler
- Department of Knowledge Brokers, THL Finnish Institute for Health and Welfare, Helsinki, Finland
- Region Stockholm, Academic Primary Health Care Centre, Stockholm, Sweden
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Anna Heino
- Department of Knowledge Brokers, THL Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Sue Jordan
- Faculty of Medicine, Health and Life Science, Swansea University, Swansea, UK
| | - Babak Khoshnood
- Université Paris Cité, Centre of Research in Epidemiology and StatisticS (CRESS), Obstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), Paris, France
| | - Kari Klungsoyr
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
- Division of Mental and Physical Health, Norwegian Institute of Public Health, Bergen, Norway
| | - Nathalie Lelong
- Université Paris Cité, Centre of Research in Epidemiology and StatisticS (CRESS), Obstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), Paris, France
| | - Renée L Lutke
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Amanda J Neville
- IMER Registry (Emilia Romagna Registry of Birth Defects), Center for Clinical and Epidemiological Research, University of Ferrara and Azienda Ospedaliero Universitaria di Ferrara, Ferrara, Italy
| | - David Tucker
- Congenital Anomaly Register & Information Service for Wales (CARIS), Public Health Knowledge and Research, Public Health Wales, Swansea, UK
| | - Stine K Urhoj
- Department of Paediatrics and Adolescent Medicine, Lillebaelt Hospital, University Hospital of Southern Denmark, Kolding, Denmark
- Section of Epidemiology, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Diana Wellesley
- University of Southampton and Wessex Clinical Genetics Service, Princess Anne Hospital, Southampton, UK
| | - Joan K Morris
- Population Health Research Institute, St George's University of London, London, UK
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Loane M, Given JE, Tan J, Barišić I, Barrachina-Bonet L, Cavero-Carbonell C, Coi A, Densem J, Garne E, Gissler M, Heino A, Jordan S, Lutke R, Neville AJ, Odak L, Puccini A, Santoro M, Scanlon I, Urhoj SK, de Walle HEK, Wellesley D, Morris JK. Creating a population-based cohort of children born with and without congenital anomalies using birth data matched to hospital discharge databases in 11 European regions: Assessment of linkage success and data quality. PLoS One 2023; 18:e0290711. [PMID: 37647348 PMCID: PMC10468043 DOI: 10.1371/journal.pone.0290711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 08/14/2023] [Indexed: 09/01/2023] Open
Abstract
Linking routinely collected healthcare administrative data is a valuable method for conducting research on morbidity outcomes, but linkage quality and accuracy needs to be assessed for bias as the data were not collected for research. The aim of this study was to describe the rates of linking data on children with and without congenital anomalies to regional or national hospital discharge databases and to evaluate the quality of the matched data. Eleven population-based EUROCAT registries participated in a EUROlinkCAT study linking data on children with a congenital anomaly and children without congenital anomalies (reference children) born between 1995 and 2014 to administrative databases including hospital discharge records. Odds ratios (OR), adjusted by region, were estimated to assess the association of maternal and child characteristics on the likelihood of being matched. Data on 102,654 children with congenital anomalies were extracted from 11 EUROCAT registries and 2,199,379 reference children from birth registers in seven regions. Overall, 97% of children with congenital anomalies and 95% of reference children were successfully matched to administrative databases. Information on maternal age, multiple birth status, sex, gestational age and birthweight were >95% complete in the linked datasets for most regions. Compared with children born at term, those born at ≤27 weeks and 28-31 weeks were less likely to be matched (adjusted OR 0.23, 95% CI 0.21-0.25 and adjusted OR 0.75, 95% CI 0.70-0.81 respectively). For children born 32-36 weeks, those with congenital anomalies were less likely to be matched (adjusted OR 0.78, 95% CI 0.71-0.85) while reference children were more likely to be matched (adjusted OR 1.28, 95% CI 1.24-1.32). Children born to teenage mothers and mothers ≥35 years were less likely to be matched compared with mothers aged 20-34 years (adjusted ORs 0.92, 95% CI 0.88-0.96; and 0.87, 95% CI 0.86-0.89 respectively). The accuracy of linkage and the quality of the matched data suggest that these data are suitable for researching morbidity outcomes in most regions/countries. However, children born preterm and those born to mothers aged <20 and ≥35 years are less likely to be matched. While linkage to administrative databases enables identification of a reference group and long-term outcomes to be investigated, efforts are needed to improve linkages to population groups that are less likely to be linked.
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Affiliation(s)
- Maria Loane
- Faculty of Life and Health Sciences, Ulster University, Belfast, Northern Ireland, United Kingdom
| | - Joanne E. Given
- Faculty of Life and Health Sciences, Ulster University, Belfast, Northern Ireland, United Kingdom
| | - Joachim Tan
- Population Health Research Institute, St George’s University of London, London, United Kingdom
| | - Ingeborg Barišić
- Children’s Hospital Zagreb, Centre of Excellence for Reproductive and Regenerative Medicine, Medical School University of Zagreb, Zagreb, Croatia
| | - Laia Barrachina-Bonet
- Rare Diseases Research Unit, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region, Valencia, Spain
| | - Clara Cavero-Carbonell
- Rare Diseases Research Unit, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region, Valencia, Spain
| | - Alessio Coi
- Unit of Epidemiology of Rare Diseases and Congenital Anomalies, Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - James Densem
- Biomedical Computing Limited, Battle, United Kingdom
| | - Ester Garne
- Department of Paediatrics and Adolescent Medicine, Lillebaelt Hospital, University Hospital of Southern Denmark, Kolding, Denmark
| | - Mika Gissler
- Department of Knowledge Brokers, THL Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Anna Heino
- Department of Knowledge Brokers, THL Finnish Institute for Health and Welfare, Helsinki, Finland
| | - Sue Jordan
- Faculty of Medicine, Health and Life Sciences, Swansea University, Swansea, Wales, United Kingdom
| | - Renee Lutke
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Amanda J. Neville
- Emilia Romagna Registry of Birth Defects, Center for Clinical and Epidemiological Research, University of Ferrara, Azienda Ospedaliero- Universitaria di Ferrara, Ferrara, Italy
| | - Ljubica Odak
- Children’s Hospital Zagreb, Centre of Excellence for Reproductive and Regenerative Medicine, Medical School University of Zagreb, Zagreb, Croatia
| | - Aurora Puccini
- Territorial Care Service, Emilia Romagna Health Authority Bologna, Bologna, Italy
| | - Michele Santoro
- Unit of Epidemiology of Rare Diseases and Congenital Anomalies, Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | | | - Stine K. Urhoj
- Section of Epidemiology, University of Copenhagen, Copenhagen, Denmark
| | - Hermien E. K. de Walle
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Diana Wellesley
- Wessex Clinical Genetics Service, Princess Anne Hospital, Southampton, United Kingdom
| | - Joan K. Morris
- Population Health Research Institute, St George’s University of London, London, United Kingdom
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Madvig F, Pedersen MK, Urhoj SK, Bräuner EV, Jørgensen N, Priskorn L. Anogenital distance, male factor infertility and time to pregnancy. Andrology 2022; 10:686-693. [PMID: 35178873 PMCID: PMC9306635 DOI: 10.1111/andr.13161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/01/2022] [Accepted: 02/13/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Anogenital distance (AGD), the distance between the anus and genitals, is in rodents a well-established marker of early androgen action and has been suggested to be so in humans as well. Thus, a link between human AGD and semen quality and potentially fecundity may exist. OBJECTIVE The aim of this study was to assess the association between AGD and male factor infertility and among proven fertile men also time to pregnancy (TTP). MATERIAL AND METHODS All included men were recruited from and examined at Copenhagen University Hospital, Denmark (N=388). Men with impaired semen quality were included from infertile couples (N=128), and men with naturally conceived pregnant partners were invited to participate when their partners had their routine second trimester examination (N=260). All men underwent a physical examination, completed a questionnaire (including TTP for the fertile men), delivered a semen sample and had a blood sample drawn. The primary exposure was AGDAS measured from the centre of the anus to the posterior base of the scrotum. Associations between AGD and fertility status as well as between AGD and TTP among the fertile men were calculated using multiple logistic regression adjusted for covariates. RESULTS AGD did not show a statistically significant association with fertility status. In adjusted logistic regression models, the odds of infertility per 1 cm increase in AGDAS was 1.02 (95% CI: 0.88; 1.19). Amongst fertile men, a 1 cm increase in AGDAS was associated with an 8% non-statistically significantly reduced odds of having a longer (>3months) TTP (adjusted OR= 0.92, 95%CI: 0.76-1.11). CONCLUSION Our study showed that the clinical application of AGD as a predictor of fertility and fecundity seems to be limited as no associations were observed between AGD and fertility status, nor was the decreased risk of experiencing a longer TTP with longer AGDAS statistically significant. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- F Madvig
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.,International Center for Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - M K Pedersen
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.,International Center for Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - S K Urhoj
- Section of Epidemiology, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - E V Bräuner
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.,International Center for Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - N Jørgensen
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.,International Center for Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - L Priskorn
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.,International Center for Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
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6
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Sass L, Urhoj SK, Kjærgaard J, Dreier JW, Strandberg-Larsen K, Nybo Andersen AM. Fever in pregnancy and the risk of congenital malformations: a cohort study. BMC Pregnancy Childbirth 2017; 17:413. [PMID: 29221468 PMCID: PMC5723098 DOI: 10.1186/s12884-017-1585-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 11/20/2017] [Indexed: 11/25/2022] Open
Abstract
Background In a variety of animal species, hyperthermia in pregnancy has been recognized as teratogenic. Hyperthermia interferes with protein synthesis via heat-shock proteins, which can entail membrane disruption, cell death, vascular disruption, and placental infarction. This can induce severe fetal malformations or death. Fever during pregnancy, especially during embryogenesis, has also been associated with congenital malformations in human offspring. The purpose of this large cohort study of clinically recognized pregnancies was to investigate whether fever during first trimester was associated with an increased risk of congenital malformations in the offspring. Methods The Danish National Birth Cohort is a population-based cohort of 100,418 pregnant women and their offspring recruited in 1996 to 2002. Information on fever during pregnancy was collected prospectively by means of two telephone interviews. The study population comprised the 77,344 pregnancies enrolled in the Danish National Birth Cohort where self-reported information on fever during first trimester of pregnancy was available. Pregnancy outcomes were identified through linkage with the National Patient Registry. Congenital malformations within the first three and a half years of life were categorized according to EUROCAT’s classification criteria. Logistic regression models were used to estimate the associations between fever in first trimester and overall congenital malformations and congenital malformations by subgroups. Results Eight thousand three hundred twenty-one women reported fever during first trimester (10.8%) and 2876 infants were diagnosed with a congenital malformation (3.7%). Fever during first trimester did not affect the risk of overall fetal congenital malformation (OR 0.99, 95% CI 0.88–1.12). The subgroup analyses indicated slightly higher risk of congenital anomalies in the eye, ear, face and neck (OR 1.29, 95% CI 0.78–2.12) and in the genitals (OR 1.17, 95% CI 0.79–1.12), whereas lower risk of malformations in the nervous system (OR 0.47, 95% CI 0.21–1.08), the respiratory system (OR 0.56, 95% CI 0.23–1.29) and in the urinary subgroup (OR 0.58, 95% CI 0.35–0.99) was suggested, the latter constituting the only statistically significant finding. Conclusions Overall, this study did not show any association between maternal fever in pregnancy and risk of congenital anomalies.
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Affiliation(s)
- L Sass
- Department of Public Health, University of Copenhagen, Øster Farimagsgade 5A, Box 2099, 1014, København K, Denmark. .,, Ulsevej 43, 2650, Hvidovre, Denmark.
| | - S K Urhoj
- Department of Public Health, University of Copenhagen, Øster Farimagsgade 5A, Box 2099, 1014, København K, Denmark
| | - J Kjærgaard
- Child and Adolescent Health Clinic, Juliane Marie Center, Research Unit for Women's and Children's Health, Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen Ø, Denmark
| | - J W Dreier
- Department of Economics and Business Economics, Aarhus University, Fuglesangs Allé 4, DK-8210, Aarhus V, Denmark
| | - K Strandberg-Larsen
- Department of Public Health, University of Copenhagen, Øster Farimagsgade 5A, Box 2099, 1014, København K, Denmark
| | - A-M Nybo Andersen
- Department of Public Health, University of Copenhagen, Øster Farimagsgade 5A, Box 2099, 1014, København K, Denmark
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