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Table 2 Descriptive statistics for age, physical activity, and screen time [mean (SE)] (Waves II and III)a

From: Screen time and physical activity during adolescence: longitudinal effects on obesity in young adulthood

  MALES FEMALES
  Wave II Wave III Wave II Wave III
  Not Obese Obese Not Obese Obese Not Obese Obese Not Obese Obese
Count 4529 550 3831 1048 3823 453 3289 987
Age 16.0 (0.12) 15.9 (0.19) 21.5 (0.11) 21.6 (0.14) 15.8 (0.12)** 16.0 (0.14)** 21.2 (0.12)** 21.5 (0.13)**
MVPA (bouts/wk)b 4.1 (0.06)** 3.7 (0.13)** 2.5 (0.04) 2.5 (0.09) 3.4 (0.07)** 2.9 (0.12)** 2.1 (0.05) 2.0 (0.08)
MVPA (change)b --c --c -0.3 (0.01)** -0.2 (0.02)** --c --c -0.2 (0.01) -0.1 (0.02)
Screen Time (hrs/wk)d 19.3 (0.45)* 21.8 (1.11)* 18.7 (0.40) 20.3 (0.82) 15.9 (0.53)** 20.3 (1.19)** 15.3 (0.39)* 21.2 (0.96)*
Screen Time (change)d --c --c -0.7 (0.44) -0.4 (0.97) --c --c -0.2 (0.49)** 2.0 (0.98)**
  1. * Significant difference by obesity status within wave and gender (p < 0.05). ** Significant difference by obesity status within wave and gender (p < 0.01).
  2. a National Longitudinal Study of Adolescent Health [N = 9,155]. Weighted for national representation, standard errors corrected for survey design effects of multiple stage cluster sampling
  3. b MVPA = moderate to vigorous physical activity. MVPA (change) = (Wave III MVPA) - (Wave II MVPA)
  4. c Variable is not applicable for Wave II.
  5. d Screen Time = hours/week of television and video viewing. Screen Time (change) = (Wave III Screen Time) - (Wave II Screen Time)