| C1‘Instrumental computer users’ | C2 ‘Multi-modal E-gamers’ | C3 ‘Computer E-gamers’ |  |
---|---|---|---|---|
 | (n = 274) | (n = 185) | (n = 184) | p-value1 |
Gender (n = 643) |  |  |  |  |
  Male n (%) | 58 (21.2)a | 185 (100.0)b | 50 (27.2)a | <0.001 |
  Female n (%) | 216 (78.8) | 0 | 134 (72.8) |  |
SBM activity (h/week: median, interquartile range)(n = 643) |  |  |  |  |
  Computer |  |  |  |  |
  General comp use | 1.8a (3.2) | 0.0b (2.1) | 0.0c (0.0) | <0.001 |
  Email | 0.2a (3.3) | 0.0b (0.0) | 0.0b (0.0) | <0.001 |
  Computer-graphics | 0.0 (0.0) | 0.0 (0.0) | 0.0 (0.0) | 0.079 |
  Internet | 0.3a (1.8) | 0.0b (1.4) | 0.0c (0.0) | <0.001 |
  Word processing | 0.0a (0.5) | 0.0a (0.0) | 0.0b (0.0) | <0.001 |
  Computer games | 0.0a (0.2) | 2.7b (7.1) | 0.8c (5.3) | <0.001 |
 Non-computer games | 0.0a (0.0) | 3.1b (7.0) | 0.0a (0.0) | <0.001 |
 TV | 12.8a (9.6) | 20.9b (13.8) | 16.8c (14.2) | <0.001 |
 Total SBM | 21.2 a (11.9) | 34.1b (20.4) | 22.1a (14.6) | <0.001 |
  Males | 24.1 a (13.1) | 34.1b (20.4) | 22.3a (17.6) | <0.001 |
  Females | 20.8 (11.7) |  | 22.1 (14.4) | 0.098 |
Other activities | Â | Â | Â | Â |
 Reading (h/wk: median, IQR)(n = 643) |  |  |  |  |
  Males | 0.9 (2.3) | 1.2 (2.9) | 1.3 (3.9) | 0.122 |
  Females | 1.6 (3.1) |  | 1.7 (3.0) | 0.674 |
 Phone use (h/wk: median, IQR) (n = 643) |  |  |  |  |
  Males | 0.0a (0.9) | 0.0b (0.2) | 0.0b (0.0) | 0.009 |
  Females | 0.3 (1.3) |  | 0.2 (1.2) | 0.352 |
 Pedometer count (n = 537) (steps/wk: mean, SD) |  |  |  |  |
  Males | 87,472a(27,262) | 73,684b (26,544) | 88,490a (32,191) | <0.001 |
  Females | 68,589 (22,455) |  | 68,187 (24,264) | 0.885 |
 MVPA exercise out of school (n = 643)(h/wk: mean, SD) |  |  |  |  |
  Males | 18.2a (8.4) | 14.7b (7.8) | 16.3a,b (9.7) | 0.017 |
  Females | 12.9 (6.6) |  | 13.5 (7.4) | 0.380 |
Physical measures | Â | Â | Â | Â |
 Body mass index (mean, SD)(n = 641) |  |  |  |  |
  Males | 20.1 (3.4) | 20.7 (3.7) | 20.8 (4.2) | 0.536 |
  Females | 21.4 (4.0) |  | 21.2 (4.4) | 0.629 |
 Back muscle endurance (secs: mean, SD)(n = 634) |  |  |  |  |
  Males | 98.9 (67.4) | 81.0 (55.9) | 96.0 (70.9) | 0.082 |
  Females | 89.2 (63.1) |  | 90.7 (68.9) | 0.839 |
Sitting trunk angle (deg: mean, SD)(n = 609) |  |  |  |  |
Males | 236.1 (11.6) | 239.3 (11.9) | 235.8 (11.1) | 0.074 |
Females | 224.9 (10.0) | Â | 226.7 (10.7) | 0.126 |
Spinal pain | Â | Â | Â | Â |
 Neck pain sitting (n (%))(n = 639) |  |  |  |  |
  Males | 3 (5.3) | 10 (5.4) | 1 (2.0) | 0.593 |
  Females | 20 (9.4) |  | 11 (8.2) | 0.717 |
 Back pain sitting (n (%))(n = 641) |  |  |  |  |
  Males | 6 (10.5) | 19 (10.3) | 6 (12.0) | 0.943 |
  Females | 34 (15.7) |  | 28 (20.9) | 0.220 |
Psychosocial measures | Â | Â | Â | Â |
 Self-efficacy2 (mean, SD)(n = 638) |  |  |  |  |
  Males | 3.5 (0.6) | 3.4 (0.6) | 3.4 (0.6) | 0.531 |
  Females | 3.4a (0.6) |  | 3.2b (0.7) | 0.028 |
 Depression3 (median, IQR)(n = 639) |  |  |  |  |
  Males | 3.0a (4.0) | 4.0b (7.0) | 4.0b (7.0) | 0.046 |
  Females | 5.0 (8.0) |  | 5.0 (9.0) | 0.995 |
 Internalising behaviour4(mean, SD)(n = 636) |  |  |  |  |
  Males | 7.4 (5.0) | 9.1 (6.1) | 10.0 (6.8) | 0.071 |
  Females | 10.2 (6.5) |  | 10.2 (6.6) | 0.950 |
 Externalising behaviour4 (mean, SD)(n = 636) |  |  |  |  |
  Males | 9.4 (6.2) | 10.3 (6.3) | 10.1 (5.5) | 0.647 |
  Females | 10.6(6.6) |  | 9.8 (5.5) | 0.262 |
Socioeconomic Status | Â | Â | Â | Â |
 based on CD5 (mean, SD)(n = 625) |  |  |  |  |
  Males | 1073a (82) | 1035b (91) | 1029b (93) | 0.016 |
  Females | 1042 (88) |  | 1024 (94) | 0.062 |