Cardwell, Chris R. and Stene, Lars C. and Joner, Geir and Bulsara, Max K. and Cinek, Ondrej and Rosenbauer, Joachim and Ludvigsson, Johnny and Jane, Mireia and Svensson, Jannet and Goldacre, Michael J. and Waldhoer, Thomas and Jarosz-Chobot, Przemyslawa and Gimeno, Suely G. A. and Chuang, Lee-Ming and Parslow, Roger C. and Wadsworth, Emma J. K. and Chetwynd, Amanda and Pozzilli, Paolo and Brigis, Girts and Urbonaite, Brone and Sipetic, Sandra and Schober, Edith and Devoti, Gabriele and Ionescu-Tirgoviste, Constantin and de Beaufort, Carine E. and Stoyanov, Denka and Buschard, Karsten and Patterson, Chris C. (2010) Maternal age at birth and childhood type 1 diabetes:a pooled analysis of 30 observational studies. Diabetes Care, 59 (2). pp. 486-494. ISSN 1935-5548
Full text not available from this repository.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