Association between Mobile Phone Use and ADHD in Children in 2008 and 2010, Korea, the CHEER study.

CHEER, Children’s Health and Environmental Health Research; ADHD, Attention Deficit Hyperactivity Disorder.Odds ratio (OR)1 estimated using simple logistic regression (in 2008 or 2010) or unadjusted generalized estimating equation analysis (2008–2010).OR2 in 2008 or 2010 estimated using multiple logistic regression analysis for each time point after adjusting for age, gender, number of siblings, area, household income, maternal smoking during pregnancy, child’s history of neuropsychiatric illness, parental history of neuropsychiatric illness, parental marital status, and blood lead level.OR2 in 2008 and 2010 estimated using a generalized estimating equation analysis for repeated measure at two time points after adjusting for age, gender, number of siblings, area, household income, maternal smoking during pregnancy, child’s history of neuropsychiatric illness, parental history of neuropsychiatric illness, and parental marital status as time-independent covariates and blood lead levels as time-varying covariates.*Among children who owned their mobile phone.