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Table 1 Descriptive analysis. National Growth and Health Study

From: Developmental trajectories of physical activity and television viewing during adolescence among girls: National Growth and Health Cohort Study

  White girls (n = 1,036) Black girls (n = 1,119) P-value
Parental education level, n (%)    
≤ High school 194 (18.7 %) 339 (30.3 %)  
Some college 320 (30.9 %) 540 (48.3 %) <0.01
≥4-year college 521 (50.3 %) 239 (21.4 %)  
HAQ scores (MET-times/wk), mean ± SD    
  Age 10 years 33.3 ± 18.9 30.4 ± 19.5 <0.01
  Age 12 years 25.5 ± 15.7 23.1 ± 15.8 <0.01
  Age 14 years 22.7 ± 15.9 17.4 ± 13.5 <0.01
  Age 16 years 13.9 ± 14.3 6.1 ± 10.1 <0.01
  Age 17 years 11.7 ± 14.0 5.4 ± 10.3 <0.01
  Age 18 years 15.6 ± 15.7 7.0 ± 11.8 <0.01
  Age 19 years 17.9 ± 19.8 7.2 ± 13.0 <0.01
TV viewing hours (hours/wk), mean ± SD    
  Age 10 years 24.9 ± 14.1 35.9 ± 17.0 <0.01
  Age 12 years 27.4 ± 15.8 45.8 ± 16.6 <0.01
  Age 14 years 24.9 ± 14.7 41.6 ± 16.8 <0.01
  Age 16 years 19.6 ± 14.3 39.1 ± 18.9 <0.01
  Age 17 years 17.9 ± 14.8 36.6 ± 19.7 <0.01
  Age 18 years 17.4 ± 15.4 36.3 ± 20.3 <0.01
  Age 19 years 18.9 ± 16.6 38.9 ± 20.2 <0.01
  1. SD standard deviation