Table 1 Summary of the participants at each follow-up period
Follow-up period | |||||
|---|---|---|---|---|---|
7 years | 9 years | 12 years | 15 years | ||
Sample | n (% with valid data) | 502 (97) | 506 (98) | 420 (95) | 306 (94) |
Sex (male) | % | 50.2 | 48.2 | 46.9 | 46.7 |
Age (years) | Mean (s.d.) | 7.5 (0.5) | 9.3 (0.4) | 12.5 (0.3) | 15.2 (0.4) |
Weight (kg) | Mean (s.d.) | 26.4 (5.2) | 33.5 (7.6) | 49.6 (12.2) | 62.2 (14.1) |
Height (cm) | Mean (s.d.) | 124.9 (5.6) | 135.6 (6.4) | 154.6 (7.8) | 167.0 (8.3) |
Townsend score (n) | n (%) | ||||
1 (most affluent) | 97 (19.3) | 96 (18.9) | 85 (20.2) | 59 (19.3) | |
2 | 113 (22.5) | 119 (23.5) | 101 (24.1) | 79 (25.9) | |
3 | 108 (21.5) | 110 (21.7) | 94 (22.4) | 68 (22.3) | |
4 | 90 (17.9) | 93 (18.4) | 68 (16.2) | 48 (15.7) | |
5 (least affluent) | 88 (17.5) | 82 (16.2) | 66 (15.7) | 49 (16.1) | |
Missing | 6 (1.2) | 6 (1.2) | 6 (1.4) | 3 (0.7) | |
BMI (kg m−2) | Mean (s.d.) | 16.8 (2.3) | 18.0 (2.9) | 20.6 (3.9) | 22.2 (4.4) |
FMI (kg m−2)a | Mean (s.d.) | 4.0 (1.8) | 4.8 (2.4) | 5.4 (3.3) | 6.5 (4.1) |
Wear time per day (min) | Mean (s.d.) | 671.1 (68.9) | 672.5 (75.6) | 717.7 (82.6) | 725.6 (82.5) |
Number of valid days included | Mean (s.d.) | 6.4 (0.9) | 6.0 (1.2) | 5.9 (1.3) | 5.6 (1.3) |
ST (%) | Mean (s.d.) | 51.5 (7.7) | 55.4 (7.0) | 64.8 (8.2) | 73.4 (6.6) |
ST (min) | Mean (s.d.) | 346.5 (66.4) | 372.8 (63.3) | 466.5 (86.6) | 535.1 (85.6) |
SF (bouts/sedentary hour) | Mean (s.d.) | 16.7 (1.7) | 16.7 (1.6) | 15.3 (2.3) | 13.0 (2.4) |
Accumulated time spent in sedentary bouts >1 min | Mean (s.d.) | 263.3 (65.9) | 294.0 (64.1) | 394.8 (88.0) | 480.6 (88.9) |
MVPA (%) | Mean (s.d.) | 6.0 (2.6) | 5.5 (2.3) | 4.4 (2.4) | 4.3 (2.4) |
