Table 1 Characteristics of study participants
Total (n = 996) | 11-year-old (n = 219) | 12-year-old (n = 238) | 13-year-old (n = 270) | 14-year-old (n = 269) | |
|---|---|---|---|---|---|
Gender (n, %) | |||||
Males | 551 (55.3%) | 111 (50.7%) | 132 (55.5%) | 155 (57.4%) | 153 (56.9%) |
Females | 445 (44.7%) | 108 (49.3%) | 106 (44.5%) | 115 (42.6%) | 116 (43.1%) |
BMIz (mean, SD) | 19.73 ± 3.52 | 18.99 ± 3.25 | 19.31 ± 3.32 | 19.52 ± 3.37 | 20.87 ± 3.61 |
Males | 20.17 ± 3.60 | 19.27 ± 3.28 | 19.74 ± 3.45 | 19.82 ± 3.06 | 21.54 ± 4.08 |
Females | 19.17 ± 3.34 | 18.65 ± 3.21 | 18.78 ± 3.15 | 19.14 ± 3.76 | 20.03 ± 3.03 |
Sleep time (mean, SD) | 506.75 ± 73.42 | 532.36 ± 72.19 | 521.35 ± 75.52 | 499.06 ± 71.45 | 480.81 ± 63.78 |
Males | 504.46 ± 75.14 | 527.84 ± 73.74 | 517.97 ± 80.24 | 494.74 ± 75.70 | 486.21 ± 64.68 |
Females | 509.61 ± 71.20 | 537.95 ± 70.27 | 525.53 ± 69.67 | 504.42 ± 66.18 | 474.12 ± 62.67 |
Sitting time (mean, SD) | 544.03 ± 129.55 | 536.61 ± 109.45 | 531.98 ± 116.09 | 550.30 ± 134.78 | 556.50 ± 143.88 |
Males | 539.11 ± 136.05 | 547.21 ± 105.92 | 529.31 ± 112.85 | 537.40 ± 143.18 | 543.27 ± 163.99 |
Females | 550.18 ± 120.82 | 523.49 ± 113.82 | 535.28 ± 120.10 | 566.28 ± 124.37 | 572.89 ± 118.97 |
Screen time (mean, SD) | 132.88 ± 98.08 | 108.84 ± 81.46 | 124.50 ± 92.88 | 151.94 ± 109.92 | 139.97 ± 94.16 |
Males | 139.82 ± 98.52 | 113.17 ± 68.65 | 128.70 ± 101.53 | 164.52 ± 114.31 | 143.48 ± 90.59 |
Females | 124.16 ± 96.94 | 103.48 ± 97.33 | 119.31 ± 82.17 | 136.37 ± 104.48 | 135.63 ± 98.57 |
Preference for school breaka (Active) (n, %) | 669 (67.2%) | 177 (80.8%) | 176 (73.9%) | 168 (62.2%) | 148 (55.0%) |
Males | 394 (71.5%) | 98 (88.3%) | 106 (80.9%) | 98 (63.2%) | 92 (59.7%) |
Females | 275 (61.8%) | 79 (73.8%) | 70 (65.4%) | 70 (60.9%) | 56 (48.3%) |
Playgroundb (Yes) | 766 (76.9%) | 171 (78.1%) | 177 (74.4%) | 210 (77.7%) | 208 (77.3%) |
Males | 423 (76.8%) | 88 (79.3%) | 96 (73.3%) | 123 (79.4%) | 116 (75.3%) |
Females | 343 (77.1%) | 83 (77.6%) | 81 (75.7%) | 87 (75.7%) | 92 (79.3%) |
School Transportationc (Active) (n, %) | 318 (31.9%) | 52 (23.7%) | 68 (28.6%) | 86 (31.9%) | 112 (41.6%) |
Males | 184 (33.4%) | 25 (22.5%) | 42 (32.1%) | 50 (32.3%) | 67 (43.5%) |
Females | 134 (30.1%) | 27 (25.2%) | 26 (24.3%) | 36 (31.3%) | 45 (38.8%) |
Siblingsd (Yes) (n, %) | 847 (85.1%) | 184 (84.4%) | 203 (85.3%) | 223 (82.6%) | 237 (88.1%) |
Males | 474 (86.0%) | 94 (84.7%) | 112 (85.5%) | 132 (85.2%) | 136 (88.3%) |
Females | 373 (83.8%) | 90 (84.1%) | 91 (85.0%) | 91 (79.1%) | 101 (87.1%) |
PAQ Score (mean, SD) | 2.64 ± 0.70 | 2.78 ± 0.66 | 2.81 ± 0.71 | 2.59 ± 0.68 | 2.41 ± 0.69 |
Males | 2.75 ± 0.71 | 2.84 ± 0.70 | 2.96 ± 0.68 | 2.65 ± 0.70 | 2.61 ± 0.70 |
Females | 2.49 ± 0.67 | 2.71 ± 0.62 | 2.64 ± 0.70 | 2.51 ± 0.64 | 2.14 ± 0.57 |
PAQ classificatione (Active) (n, %) | 426 (42.8%) | 114 (52.1%) | 129 (54.2%) | 107 (39.6%) | 76 (28.3%) |
Males | 276 (50.1%) | 63 (56.8%) | 88 (66.7%) | 65 (41.9%) | 60 (39.2%) |
Females | 150 (33.7%) | 51 (47.2%) | 41 (38.7%) | 42 (36.5%) | 16 (13.8%) |
Sport Participationf (Yes) (n, %) | 603 (60.5%) | 128 (58.7%) | 152 (63.9%) | 164 (60.7%) | 159 (58.9%) |
Males | 371 (67.3%) | 81 (69.2%) | 89 (71.2%) | 109 (66.5%) | 92 (63.4%) |
Females | 232 (52.1%) | 47 (46.5%) | 63 (55.8%) | 55 (51.9%) | 67 (53.6%) |