Abbreviations: SE, standard error; BMI, body mass index; HS, high school.*<0.0001;<0.01;*<0.05;<0.1, P-value comparing Hispanic and Asian subgroups to whites.aWeighted for national representation, standard errors corrected for survey design effects of multiple stage cluster sampling.bScreen time = hours of TV, video, and computer game use per week; estimates averaged across waves (wave II–IV).cPhysical activity = weekly bouts of moderate to vigorous physical activity; estimates averaged across waves (wave II–IV).dCurrent smoking: any cigarette smoking in previous 30 days; adolescence: age  = 18.