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Table 1 Age, screen time and anthropometric characteristics of the sample (n = 1278; 630 boys, 648 girls).

From: Stability of television viewing and electronic game/computer use in a prospective cohort study of Australian children: relationship with body mass index

  Baseline Follow-up
Characteristic Total sample Males Females Total sample Males Females
Age (yrs) [m (SD)] 7.6 (1.2) 7.7 (1.2) 7.5 (1.2) 10.7 (1.2) 10.8 (1.2) 10.7 (1.2)
TV viewing (hrs/wk) [m (SD)] 14.0 (7.6) 14.4 (7.8) 13.7 (7.5) 15.2 (7.1) 15.2 (7.3) 15.2 (6.8)
Games/computer (hrs/wk) [m (SD)] 3.9 (4.1) 4.9 (4.5) 3.0 (3.3) 8.5 (6.9) 10.6 (7.4) 6.3 (5.6)
Total screen time (hrs/wk) [m (SD)] 18.0 (9.2) 19.3 (9.6) 16.7 (8.6) 23.7 (10.7) 25.8 (11.5) 21.6 (9.3)
Meet guidelines [n (%)]* 509 (40) 220 (35) 289 (45) 226 (18) 73 (12) 153 (24)
BMI z-score [m (SD)] 0.4 (0.9) 0.5 (0.8) 0.4 (0.9) 0.4 (0.9) 0.4 (0.9) 0.3 (0.9)
BMI category [n (%)]:       
   Not overweight 959 (81) 478 (82) 481 (79) 953 (76) 483 (78) 470 (74)
   Overweight 178 (15) 83 (14) 95 (16) 246 (20) 112 (18) 134 (21)
   Obese 51 (4) 22 (4) 29 (5) 52 (4) 24 (4) 28 (4)
  1. *Australian Physical Activity Recommendations for children indicate no more than 2 hrs per day should be spent engaged in electronic media use [5].