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Autism risk associated with parental age and with increasing difference in age between the parents

Research output: Contribution to journalArticle

S. Sandin, D. Schendel, P. Magnusson, C. Hultman, P. Surén, E. Susser, T. GrØnborg, M. Gissler, N. Gunnes, R. Gross, M. Henning, M. Bresnahan, A. Sourander, M. Hornig, K. Carter, R. Francis, E. Parner, H. Leonard, M. Rosanoff, C. Stoltenberg & 1 more A. Reichenberg

Original languageEnglish
Pages (from-to)693-700
Number of pages8
JournalMolecular Psychiatry
Issue number5
Early online date9 Jun 2015
Publication statusPublished - 1 May 2016

King's Authors


Advancing paternal and maternal age have both been associated with risk for autism spectrum disorders (ASD). However, the shape of the association remains unclear, and results on the joint associations is lacking. This study tests if advancing paternal and maternal ages are independently associated with ASD risk and estimates the functional form of the associations. In a population-based cohort study from five countries (Denmark, Israel, Norway, Sweden and Western Australia) comprising 5 766 794 children born 1985-2004 and followed up to the end of 2004-2009, the relative risk (RR) of ASD was estimated by using logistic regression and splines. Our analyses included 30 902 cases of ASD. Advancing paternal and maternal age were each associated with increased RR of ASD after adjusting for confounding and the other parent's age (mothers 40-49 years vs 20-29 years, RR=1.15 (95% confidence interval (CI): 1.06-1.24), P-value

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