Clinical Edge

Summaries of Must-Read Clinical Literature, Guidelines, and FDA Actions

Sleep, Physical Activity, and Screen-Time Examined

JAMA Pediatrics; ePub 2019 Feb 4; Knell, et al

Findings from a recent study indicate that only 5% of US high school students (3% of girls; 7% of boys) spend the optimal time sleeping and being physically active while limiting screen time, with important disparities shown by vulnerable subgroups. Cross-sectional data from the 2011, 2013, 2015, and 2017 cycles of the Youth Risk Behavior Surveillance Survey were used. Researchers found:

  • 59,397 participants were included in the unweighted data set.
  • Overall, 5.0% of US adolescents met recommendations for sleep, physical activity, and screen time concurrently.
  • Stratified analysis by sex revealed a lower proportion of girls (3.0%) than boys (7.0%) met all 3 behavioral recommendations.
  • The observed sex differences were consistent across all other subgroups of interest.
  • There were significant disparities in the odds of meeting all 3 behavioral recommendations by age, race/ethnicity, body mass index, marijuana use, and depressive symptoms.
  • Girls who reported alcohol use had 28% lower odds of meeting all the recommendations concurrently compared with girls who did not use alcohol.


Knell G, Durand CP, Kohl III HW, Wu IHC, Gabriel KP. Prevalence and likelihood of meeting sleep, physical activity, and screen-time guidelines among US youth. [Published online ahead of print February 4, 2019]. JAMA Pediatrics. doi:10.1001/jamapediatrics.2018.4847.