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Title: Maternal Age at Birth and Childhood Type 1 Diabetes: A Pooled Analysis of 30 Observational Studies
Authors: Cardwell, Chris R.
Stene, Lars C.
Joner, Geir
Bulsara, Max K.
Cinek, Ondrej
Rosenbauer, Joachim
Ludvigsson, Johnny
Jane, Mireia
Svensson, Jannet
Goldacre, Michael J.
Waldhoer, Thomas
Jarosz-Chobot, Przemyslawa
Gimeno, Suely Godoy Agostinho [UNIFESP]
Chuang, Lee-Ming
Parslow, Roger C.
Wadsworth, Emma J. K.
Chetwynd, Amanda
Pozzilli, Paolo
Brigis, Girts
Urbonaite, Brone
Sipetic, Sandra
Schober, Edith
Devoti, Gabriele
Ionescu-Tirgoviste, Constantin
Beaufort, Carine E. de
Stoyanov, Denka
Buschard, Karsten
Patterson, Chris C.
Queens Univ Belfast
Norwegian Inst Publ Hlth
Oslo Univ Hosp
Univ Oslo
Univ Notre Dame
Charles Univ Prague
Univ Dusseldorf
Linkoping Univ
Dept Hlth
Glostrup Univ Hosp
Univ Oxford
Med Univ Vienna
Med Univ Silesia
Universidade Federal de São Paulo (UNIFESP)
Natl Taiwan Univ Hosp
Univ Leeds
Cardiff Univ
Univ Lancaster
Univ Campus Biomed
Riga Stradins Univ
Kaunas Univ Med
Univ Belgrade
Univ Lecce
N Paulescu Inst Diabet
Pediat Clin
Childrens Diabet Ctr
Issue Date: 1-Feb-2010
Publisher: Amer Diabetes Assoc
Citation: Diabetes. Alexandria: Amer Diabetes Assoc, v. 59, n. 2, p. 486-494, 2010.
Abstract: OBJECTIVE-The aim if the study was to investigate whether children born to older mothers have an increased risk of type 1 diabetes by performing a pooled analysis of previous studies using individual patient data to adjust for recognized confounders.RESEARCH DESIGN and METHODS-Relevant studies published before June 2009 were identified from MEDLINE, Web of Science, and EMBASE. Authors of studies were contacted and asked to provide individual patient data or conduct prespecified analyses. Risk estimates of type 1 diabetes by maternal age were calculated for each study, before and after adjustment for potential confounders. Meta-analysis techniques were used to derive combined odds ratios and to investigate heterogeneity among studies.RESULTS-Data were available for 5 cohort and 25 case-control studies, including 14,724 cases of type 1 diabetes. Overall, there was, on average, a 5% (95% CI 2-9) increase in childhood type 1 diabetes odds per 5-year increase in maternal age (P = 0.006), but there was heterogeneity among studies (heterogeneity I(2) = 70%). in studies with a low risk of bias, there was a more marked increase in diabetes odds of 10% per 5-year increase in maternal age. Adjustments for potential confounders little altered these estimates.CONCLUSIONS-There was evidence of a weak but significant linear increase in the risk of childhood type 1 diabetes across the range of maternal ages, but the magnitude of association varied between studies. A very small percentage of the increase in the incidence of childhood type 1 diabetes in recent years could be explained by increases in maternal age. Diabetes 59:486-494, 2010
ISSN: 0012-1797
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