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Felber J, Bläker H, Fischbach W, Koletzko S, Laaß M, Lachmann N, Lorenz P, Lynen P, Reese I, Scherf K, Schuppan D, Schumann M, Aust D, Baas S, Beisel S, de Laffolie J, Duba E, Holtmeier W, Lange L, Loddenkemper C, Moog G, Rath T, Roeb E, Rubin D, Stein J, Török H, Zopf Y. Aktualisierte S2k-Leitlinie Zöliakie der Deutschen Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselkrankheiten (DGVS). ZEITSCHRIFT FUR GASTROENTEROLOGIE 2022; 60:790-856. [PMID: 35545109 DOI: 10.1055/a-1741-5946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Jörg Felber
- Medizinische Klinik II - Gastroenterologie, Hepatologie, Endokrinologie, Hämatologie und Onkologie, RoMed Klinikum Rosenheim, Rosenheim, Deutschland
| | - Hendrik Bläker
- Institut für Pathologie, Universitätsklinikum Leipzig AöR, Leipzig, Deutschland
| | | | - Sibylle Koletzko
- Kinderklinik und Kinderpoliklinik im Dr. von Haunerschen Kinderspital, LMU-Klinikum München, München, Deutschland.,Department of Pediatrics, Gastroenterology and Nutrition, School of Medicine Collegium Medicum University of Warmia and Mazury, 10-719 Olsztyn, Polen
| | - Martin Laaß
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Dresden, Deutschland
| | - Nils Lachmann
- Institut für Transfusionsmedizin, Charité - Universitätsmedizin Berlin, Berlin, Deutschland
| | - Pia Lorenz
- Deutsche Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselkrankheiten (DGVS), Berlin, Deutschland
| | - Petra Lynen
- Deutsche Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselkrankheiten (DGVS), Berlin, Deutschland
| | - Imke Reese
- Ernährungsberatung und -therapie Allergologie, München, Deutschland
| | - Katharina Scherf
- Institute of Applied Biosciences Department of Bioactive and Functional Food Chemistry, Karlsruhe Institute of Technology (KIT), Karlsruhe, Deutschland
| | - Detlef Schuppan
- Institut für Translationale Immunologie, Johannes Gutenberg-Universität Mainz, Mainz, Deutschland.,Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Michael Schumann
- Medizinische Klinik I für Gastroenterologie, Infektiologie und Rheumatologie, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Deutschland
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Reproductive Characteristics and Pregnancy Outcomes in Hidden Celiac Disease Autoimmunity. Am J Gastroenterol 2021; 116:593-599. [PMID: 33560653 DOI: 10.14309/ajg.0000000000001148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 12/22/2020] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Untreated symptomatic celiac disease (CD) adversely affects female reproduction; however, the effect of hidden CD autoimmunity is uncertain. METHODS We identified women who were not previously diagnosed with CD and tested positive for tissue transglutaminase and endomysial antibodies between 2006 and 2011 in a community-based retrospective cohort study. We evaluated (i) the rate of adverse pregnancy outcomes and medical complications of pregnancy in successful singleton deliveries and (ii) reproductive characteristics in seropositive women without a clinical diagnosis of CD and age-matched seronegative women. RESULTS Among 17,888 women whose serum samples were tested for CD autoimmunity, 215 seropositive and 415 seronegative women were included. We reviewed 231 and 509 live singleton deliveries of 117 seropositive and 250 seronegative mothers, respectively. Menarche and menopausal age, gravidity, parity, and age at first child were similar in seropositive and seronegative women. CD seropositivity was not associated with an increased risk of maternal pregnancy complications. Maternal seropositivity was associated with small for gestational age in boys (OR 3.77, 95% CI: 1.47-9.71; P = 0.006), but not in girls (OR 0.57, 95% CI: 0.15-2.17; P = 0.41). CD serum positivity was not associated with prematurity, small for gestational age (birth weight <10th percentile), or 5-minute Apgar score of less than 7. DISCUSSION Although underpowered, the present study did not show any difference in reproductive characteristics or rates of adverse pregnancy outcomes in women with and without CD autoimmunity, except for birth weight in male offspring. Larger studies are needed to determine the effects of CD autoimmunity on female reproduction.
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Di Simone N, Gratta M, Castellani R, D'Ippolito S, Specchia M, Scambia G, Tersigni C. Celiac disease and reproductive failures: An update on pathogenic mechanisms. Am J Reprod Immunol 2020; 85:e13334. [PMID: 32865829 DOI: 10.1111/aji.13334] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 08/10/2020] [Accepted: 08/22/2020] [Indexed: 12/22/2022] Open
Abstract
Celiac disease (CD) is an autoimmune disorder that occurs in genetically predisposed people in which the ingestion of gluten leads to damage in the small intestine that clinically presents with malabsorption-related symptoms. CD can also be the underlying cause of several non-gastrointestinal symptoms. This review summarizes evidence on the relationship between CD and gynecological/obstetric disorders like reproductive failures. Although much has been reported on such a linkage, the pathogenic mechanisms remain unclear, especially those underlying extra-gastrointestinal clinical manifestations. Studies conducted on celiac subjects presenting gynecological/obstetric disorders have pointed to intestinal malabsorption, coagulation alterations, immune-mediated tissue damage, and endometrial inflammation as the main responsible pathogenic mechanisms. Currently, however, the knowledge of such mechanisms is insufficient, and further studies are needed to gain a more thorough understanding of the matter.
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Affiliation(s)
- Nicoletta Di Simone
- U.O.C. di Ostetricia e Patologia Ostetrica, Dipartimento di Scienze della Salute della Donna, del Bambino e di Sanità Pubblica, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.,Istituto di Clinica Ostetrica e Ginecologica Università Cattolica del Sacro Cuore, Rome, Italy
| | - Matteo Gratta
- Istituto di Clinica Ostetrica e Ginecologica Università Cattolica del Sacro Cuore, Rome, Italy
| | - Roberta Castellani
- Istituto di Clinica Ostetrica e Ginecologica Università Cattolica del Sacro Cuore, Rome, Italy
| | - Silvia D'Ippolito
- U.O.C. di Ostetricia e Patologia Ostetrica, Dipartimento di Scienze della Salute della Donna, del Bambino e di Sanità Pubblica, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.,Istituto di Clinica Ostetrica e Ginecologica Università Cattolica del Sacro Cuore, Rome, Italy
| | - Monia Specchia
- Istituto di Clinica Ostetrica e Ginecologica Università Cattolica del Sacro Cuore, Rome, Italy
| | - Giovanni Scambia
- Istituto di Clinica Ostetrica e Ginecologica Università Cattolica del Sacro Cuore, Rome, Italy.,U.O.C. di Ginecologia Oncologica, Dipartimento di Scienze della Salute della Donna, del Bambino e di Sanità Pubblica, Fondazione Policlinico Universitario A.Gemelli IRCCS, Rome, Italy
| | - Chiara Tersigni
- U.O.C. di Ostetricia e Patologia Ostetrica, Dipartimento di Scienze della Salute della Donna, del Bambino e di Sanità Pubblica, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy.,Istituto di Clinica Ostetrica e Ginecologica Università Cattolica del Sacro Cuore, Rome, Italy
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Grode L, Bech BH, Plana-Ripoll O, Bliddal M, Agerholm IE, Humaidan P, Ramlau-Hansen CH. Reproductive life in women with celiac disease; a nationwide, population-based matched cohort study. Hum Reprod 2020; 33:1538-1547. [PMID: 29912336 DOI: 10.1093/humrep/dey214] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/18/2018] [Accepted: 05/22/2018] [Indexed: 12/20/2022] Open
Abstract
STUDY QUESTION How does celiac disease (CD) influence women's reproductive life, both prior to and after the diagnosis? SUMMARY ANSWER Prior to the diagnosis of CD, an increased risk of adverse pregnancy outcomes was seen, whereas after the diagnosis, no influence on reproductive outcomes was found. WHAT IS KNOWN ALREADY CD has been associated with several conditions influencing female reproduction and pregnancy outcomes including spontaneous abortion and stillbirth. STUDY DESIGN, SIZE, DURATION A nationwide matched cohort study following 6319 women diagnosed with CD and 63166 comparison women and identifying reproductive events between the ages of 15 and 50 years. PARTICIPANTS/MATERIALS, SETTING, METHODS Through linkage of several Danish national health registers, we identified all women diagnosed with CD between 1977 and 2016. We identified an age- and sex-matched comparison cohort and obtained data on reproductive outcomes for both cohorts. Adjusted stratified Cox and logistic regression models were used to estimate differences in reproductive outcomes between women with and without CD. MAIN RESULTS AND THE ROLE OF CHANCE Comparing women with diagnosed CD with the non-CD women, the chance of pregnancy, live birth and risk of stillbirth, molar and ectopic pregnancy, spontaneous abortion and abortion due to foetal disease was the same. However, prior to being diagnosed, CD women had an excess risk of spontaneous abortion equal to 11 extra spontaneous abortions per 1000 pregnancies (adjusted odds ratio (OR) = 1.12, 95% CI: 1.03, 1.22) and 1.62 extra stillbirths per 1000 pregnancies (adjusted OR = 1.57, 95% CI: 1.05, 2.33) compared with the non-CD women. In the period 0-2 years prior to diagnosis fewer pregnancies occurred in the undiagnosed CD group, equal to 25 (95% CI: 20-31) fewer pregnancies per 1000 pregnancies compared to the non-CD group and in addition, fewer undiagnosed CD women initiated ART-treatment in this period, corresponding to 4.8 (95% CI: 0.9, 8.7) fewer per 1000 women compared to non-CD women. LIMITATIONS, REASONS FOR CAUTION Validity of the diagnoses in the registers was not confirmed, but reporting to the registers is mandatory for all hospitals in Denmark. Not all spontaneous abortions will come to attention and be registered, whereas live- and stillbirths, ectopic and molar pregnancies and abortion due to foetal disease are unlikely not to be registered. We adjusted for several confounding factors but residual confounding cannot be ruled out. WIDER IMPLICATIONS OF THE FINDINGS These findings suggest that undiagnosed CD can affect female reproduction and the focus should be on early detection of CD in risk groups. STUDY FUNDING/COMPETING INTEREST(S) This study was funded by the Health Research Fund of Central Denmark Region and The Hede Nielsens Foundation, Denmark. The authors report no conflicts of interest in this work.
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Affiliation(s)
- L Grode
- Department of Medicine, Horsens Regional Hospital, Sundvej 30, Horsens, Denmark
| | - B H Bech
- Department of Public Health, Aarhus University, Bartholins Allé 2, Aarhus C, Denmark
| | - O Plana-Ripoll
- National Center for Register-based Research, Aarhus University, Fuglesangs Allé 26, Aarhus V, Denmark
| | - M Bliddal
- OPEN, Odense Hospital and Department of Clinical Research, University of Southern Denmark, J.B. Winsløws Vej 9 a, 3. etage, Odense C, Denmark
| | - I E Agerholm
- The Fertility Clinic, Horsens Regional Hospital, Sundvej 30, Horsens, Denmark
| | - P Humaidan
- Faculty of Health, Aarhus University, Palle Juul-Jensens Boulevard 82, Aarhus N, Denmark.,The Fertility Clinic, Skive Regional Hospital, Resenvej 25, Skive, Denmark
| | - C H Ramlau-Hansen
- Department of Public Health, Aarhus University, Bartholins Allé 2, Aarhus C, Denmark
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Martínez-Rodríguez A, Loaiza-Martínez DA, Sánchez-Sánchez J, Marcos-Pardo PJ, Prats S, Alacid F, Rubio-Arias JA. Tools Used to Measure the Physical State of Women with Celiac Disease: A Review with a Systematic Approach. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E539. [PMID: 31952137 PMCID: PMC7014319 DOI: 10.3390/ijerph17020539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 12/31/2019] [Accepted: 01/02/2020] [Indexed: 12/26/2022]
Abstract
Celiac disease (CD) is an immunological disorder that mainly affects the small intestine, generating an inflammatory process in response to the presence of gluten (a protein). Autoimmune diseases are part of a group of diseases that are difficult to diagnose without a specific protocol or consensus to detect them due to the number of symptoms and diseases with which it has a relationship. Therefore, the aim of this review was to analyze the diagnostic tools of CD used in middle-aged women, to compare the use and effectiveness of the different tools, and to propose a strategy for the use of the tools based on the results found in the literature. The present research followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guideline. The search was conducted in the following databases: Scielo, PubMed, Web of Science, and Worldwide Science org. In the initial literature search, 2004 titles and relevant abstracts were found. Among them, 687 were duplicates, leaving 1130 articles. Based on the inclusion criteria, only 41 articles passed the selection process; 4 main types of analyses appear in the studies: blood tests, questionnaires, clinical history, and biopsy. It can be said that none of the analyses have a 100% reliability since most of them can present false negatives; therefore, the best way to diagnose celiac disease up to now is through a combination of different tests (Immunoglobulin A and small intestinal biopsy).
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Affiliation(s)
| | | | - Javier Sánchez-Sánchez
- School of Sport and Science, European University of Madrid, 28670 Madrid, Spain;
- IGOID Research Group, University of Castilla de la Mancha, 13071 Castilla la Mancha, Spain
| | - Pablo J. Marcos-Pardo
- Faculty of Sports, Catholic University of Murcia (UCAM), 30107 Murcia, Spain; (D.A.L.-M.); (P.J.M.-P.)
| | - Soledad Prats
- Faculty of Sciences, University of Alicante, 03690 Alicante, Spain;
| | - Fernando Alacid
- Department of Education, Health Research Centre, University of Almería, 04120 Almería, Spain;
| | - Jacobo A. Rubio-Arias
- LFE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Sciences, Universidad Politécnica de Madrid (UPM), 28040 Madrid, Spain;
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Abstract
Coeliac disease (CD) is a small bowel disorder known for its intestinal manifestations like diarrhoea and weight loss. Less known are the extraintestinal manifestations of CD like haematological abnormalities but also altered female reproduction and pregnancy outcomes. Especially, undiagnosed CD may lead to adverse reproductive outcomes such as intrauterine growth restriction, stillbirth and preterm birth. In diagnosed and treated CD, adverse pregnancy outcomes might be prevented.
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Affiliation(s)
- Kim Boers
- Gynaecology and Obstetrics, Haaglanden Medical Centre, Bronovo Hospital, Den Haag, Zuid-Holland, The Netherlands
| | - Tom Vlasveld
- Haematology, Haaglanden Medical Centre, Bronovo Hospital, Den Haag, Zuid-Holland, The Netherlands
| | - Roxy van der Waart
- Gynaecology and Obstetrics, Haaglanden Medical Centre, Bronovo Hospital, Den Haag, Zuid-Holland, The Netherlands
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Abstract
Coeliac disease (CD) is a chronic gluten-dependent enteropathy very common in the general population and characterized by an extremely heterogeneous clinical picture. Although its prevalence is growing worldwide, case-finding strategy remains the mainstay to diagnosis. Thus, correct identification of high-risk categories of patients who need to be tested for CD is an essential part of medical knowledge to a large number of specialists and primary care providers. In this regard, although CD might have a serious effect on women's reproductive health, a widespread consensus is lacking on which categories of obstetric and gynaecological disorders should be tested for CD. The aim of this review is to critically summarize the current literature relevant to CD and obstetric and gynaecological disorders and to provide practical proposals that may be helpful to clinicians involved in the management of these patients.
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Fiaschi L, Nelson-Piercy C, Deb S, King R, Tata LJ. Clinical management of nausea and vomiting in pregnancy and hyperemesis gravidarum across primary and secondary care: a population-based study. BJOG 2019; 126:1201-1211. [PMID: 30786126 DOI: 10.1111/1471-0528.15662] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/04/2019] [Indexed: 12/25/2022]
Abstract
OBJECTIVES To assess how nausea and vomiting in pregnancy (NVP) and hyperemesis gravidarum (HG) are managed and treated across primary and secondary care. DESIGN Population-based pregnancy cohort. SETTING Medical records (CPRD-GOLD) from England. POPULATION 417 028 pregnancies during 1998-2014. METHODS Proportions of pregnancies with recorded NVP/HG diagnoses, primary care treatment, and hospital admissions were calculated. Multinomial logistic regression was employed to estimate adjusted relative risk ratios (aRRRs) with 99% confidence intervals (CIs) for the association between NVP/HG management paths and maternal characteristics. MAIN OUTCOME MEASURES NVP/HG diagnoses, treatments, and hospital admissions. RESULTS Overall prevalence of clinically recorded NVP/HG was 9.1%: 2.1% had hospital admissions, 3.4% were treated with antiemetics in primary care only, and 3.6% had only recorded diagnoses. Hospital admissions and antiemetic prescribing increased continuously during 1998-2013 (trend P < 0.001). Younger age, deprivation, Black/Asian/mixed ethnicity, and multiple pregnancy were associated with NVP/HG generally across all levels, but associations were strongest for hospital admissions. Most comorbidities had patterns of association with NVP/HG levels. Among women with NVP/HG who had no hospital admissions, 49% were prescribed antiemetics, mainly from first-line treatment (21% prochlorperazine, 15% promethazine, 13% cyclizine) and metoclopramide (10%). Of those admitted, 38% had prior antiemetic prescriptions (34% first-line, 9% second-line, 1% third-line treatment). CONCLUSION Previous focus on hospital admissions has greatly underestimated the NVP/HG burden. Although primary care prescribing has increased, most women admitted to hospital have no antiemetics prescribed before this. An urgent call is made to assess whether admissions could be prevented with better primary care recognition and timely treatment. TWEETABLE ABSTRACT The NVP/HG burden is increasing over time and management optimisation should be high priority to help reduce hospital admissions.
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Affiliation(s)
- L Fiaschi
- Division of Epidemiology & Public Health, University of Nottingham, Nottingham, UK
| | - C Nelson-Piercy
- Women's Health Academic Centre, Guy's & St Thomas' Foundation Trust, St Thomas' Hospital, London, UK
| | - S Deb
- Department of Obstetrics and Gynaecology, Nottingham University Hospital, Queen's Medical Centre, Nottingham, UK
| | - R King
- Sherwood Health Centre, Nottingham, UK
| | - L J Tata
- Division of Epidemiology & Public Health, University of Nottingham, Nottingham, UK
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Wilkinson DJ, Green PA, Beglinger S, Myers J, Hudson R, Edgar D, Kenny SE. Hypospadias surgery in England: Higher volume centres have lower complication rates. J Pediatr Urol 2017; 13:481.e1-481.e6. [PMID: 28434634 DOI: 10.1016/j.jpurol.2017.01.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 01/08/2017] [Indexed: 10/20/2022]
Abstract
INTRODUCTION Hypospadias surgery has progressed steadily over recent years. There remains considerable variation in the operative management of boys with hypospadias in the UK, and it is therefore difficult to identify acceptable standards with regards to reoperation rates. OBJECTIVE To determine the frequency of reoperations and complications from all centres performing hypospadias surgery in England and to identify variables that influence outcome. METHODS All children undergoing NHS hypospadias surgery in England between 1999 and 2009 were identified using the Hospital Episode Statistics database. Patient demographics, centre type, and associated diagnostic (ICD-10) and treatment codes (OPCS4.6) were collected for both primary repairs and postoperative complications. Centres were classed as high volume if they performed an average of 20 or more operations a year. Operative complications were split into revisions (repeat repairs), repairs of urethral fistulae, repairs of meatal stenosis, or urethral stricture repairs. Statistical analysis included logistic regression, Spearman's correlation, and Mann-Whitney U for non-parametric data, with p < 0.05 taken as significant. Data are presented as median (interquartile range) unless otherwise stated. RESULTS children underwent a total of 23,962 operations at 75 centres in England during the study period. The median age at primary repair was 21 (15-38) months. The overall complication rate was 18.1%. The median complication rate for individual centres was 20.0% (13.9-27.4%) overall; 10.8% (4.7-15.9%) for revision procedures, 8.1% (5.5-11.7%) for urethral fistulae, 2.3% (1.1-3.7%) for meatal stenosis repairs, and 1.8% (0-2.8%) for urethral strictures. High volume centres had significantly lower complication rates than low volume centres (17.5% vs. 25%, p = 0.01) (Figure), and this was proven to be an independent predictor of outcomes (p = 0.01). Staged repairs were associated with more complications (p < 0.001); however, patient age and centre type were not. Median time to repair of complication was 13 (8-22) months. DISCUSSION This national population-based study used hospital episode statistics data. While accuracy is high and it has been validated for use in research, it has intrinsic limitations which affect our study. We are unable to fully account for the severity of hypospadias or the number of operating surgeons within institutions. CONCLUSIONS This study has found a clear relationship between caseload volume and complications following hypospadias surgery. Furthermore, there is significant variability between centres in terms of their surgical outcomes. Taken together these results suggest that surgeons, particularly those in centres with small caseloads should assess their results against such benchmarks when evaluating the service they provide.
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Affiliation(s)
- David J Wilkinson
- University of Liverpool, Liverpool, UK; Department of Paediatric Surgery, Alder Hey Children's Hospital, NHS Foundation Trust, Liverpool, UK
| | - Patrick A Green
- University of Liverpool, Liverpool, UK; Royal Liverpool Hospital, Prescott Street, Liverpool, UK
| | | | | | | | | | - Simon E Kenny
- University of Liverpool, Liverpool, UK; Department of Paediatric Surgery, Alder Hey Children's Hospital, NHS Foundation Trust, Liverpool, UK.
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Celiac disease and obstetric complications: a systematic review and metaanalysis. Am J Obstet Gynecol 2016; 214:225-234. [PMID: 26432464 DOI: 10.1016/j.ajog.2015.09.080] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 09/11/2015] [Accepted: 09/21/2015] [Indexed: 02/03/2023]
Abstract
The aim of this metaanalysis was to evaluate the risk of the development of obstetric complications in women with celiac disease. We searched electronic databases from their inception until February 2015. We included all cohort studies that reported the incidence of obstetric complications in women with celiac disease compared with women without celiac disease (ie, control group). Studies without a control group and case-control studies were excluded. The primary outcome was defined a priori and was the incidence of a composite of obstetric complications that included intrauterine growth restriction, small for gestational age, low birthweight, preeclampsia and preterm birth. Secondary outcomes included the incidence of preterm birth, intrauterine growth restriction, stillbirth, preeclampsia, small for gestational age, and low birthweight. The review was registered with PROSPERO (CRD42015017263) before data extraction. All authors were contacted to obtain the original databases and perform individual participant data metaanalysis. Primary and secondary outcomes were assessed in the aggregate data analysis and in the individual participant data metaanalysis. We included 10 cohort studies (4,844,555 women) in this metaanalysis. Four authors provided the entire databases for the individual participant data analysis. Because none of the included studies stratified data for the primary outcome (ie, composite outcome), the assessment of this outcome for the aggregate analysis was not feasible. Aggregate data analysis showed that, compared with women in the control group, women with celiac disease (both treated and untreated) had a significantly higher risk of the development of preterm birth (adjusted odds ratio, 1.35; 95% confidence interval, 1.09-1.66), intrauterine growth restriction (odds ratio, 2.48; 95% confidence interval, 1.32-4.67), stillbirth (odds ratio, 4.84; 95% confidence interval, 1.08-21.75), low birthweight (odds ratio, 1.63; 95% confidence interval, 1.06-2.51), and small for gestational age (odds ratio, 4.52; 95% confidence interval, 1.02-20.08); no statistically significant difference was found in the incidence of preeclampsia (odds ratio, 2.45; 95% confidence interval, 0.90-6.70). The risk of preterm birth was still significantly higher both in the subgroup analysis of only women with diagnosed and treated celiac disease (odds ratio, 1.26; 95% confidence interval, 1.06-1.48) and in the subgroup analysis of only women with undiagnosed and untreated celiac disease (odds ratio, 2.50; 95% confidence interval; 1.06-5.87). Women with diagnosed and treated celiac disease had a significantly lower risk of the development of preterm birth, compared with undiagnosed and untreated celiac disease (odds ratio, 0.80; 95% confidence interval, 0.64-0.99). The individual participant data metaanalysis showed that women with celiac disease had a significantly higher risk of composite obstetric complications compared with control subjects (odds ratio, 1.51; 95% confidence interval, 1.17-1.94). Our individual participant data concurs with the aggregate analysis for all the secondary outcomes. In summary, women with celiac disease had a significantly higher risk of the development of obstetric complications that included preterm birth, intrauterine growth restriction, stillbirth, low birthweight, and small for gestational age. Since the treatment with gluten-free diet leads to a significant decrease of preterm delivery, physicians should warn these women about the importance of a strict diet to improve obstetric outcomes. Future studies calculating cost-effectiveness of screening for celiac disease during pregnancy, which could be easily performed, economically and noninvasively, are needed. In addition, further studies are required to determine whether women with adverse pregnancy outcomes should be screened for celiac disease, particularly in countries where the prevalence is high.
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