P2-61 Childhood obesity and parental smoking as risk factors for childhood ADHD in Liverpool children

IntroductionADHD prevalence has risen in parallel with rising prevalence of pregnancy smoking and childhood obesity. The objective was to determine the epidemiological association of pregnancy smoking and childhood obesity with ADHD.MethodsA cross-sectional community study was conducted in 2006 using a parental questionnaire. A total of 1074 schoolchildren aged 5–11 years were enrolled from 15 primary schools in a lower socio-economic area of Merseyside. ADHD was defined by the question “does your child have Attention Deficit Hyperactivity Disorder, (ADHD), which has been diagnosed by a doctor?”ResultsThe prevalence estimates for childhood obesity, maternal smoking during pregnancy and childhood ADHD were 14.9% (116/777), 28.0% (269/955), and 3.4% (32/945), respectively. ADHD prevalence was increased in children with obesity (RR 4.80, 95% CI 2.2 to 10.4, p