Table 1 Characteristics of the sample at the three time points
Baseline | 1-yr follow-up | 2-yr follow-up | ≥2 time pointsa | |
|---|---|---|---|---|
N consented to wear ActiGraph/distributed | 1023/448 | 874/874 | 706/706 | NA |
N with returned ActiGraph | 445 | 852 | 693 | NA |
N with ≥3 days of PA data including 1 weekend day (% of distributed sample) | 263 (58.7) | 537 (61.4) | 421 (59.6) | 412 |
Age (yrs) | 7.8 (1.0) | 8.6 (1.0) | 9.5 (1.0) | 7.6 (1.0) |
Gender (% boys) | 52.6 | 52.8 | 54.8 | 54.0 |
BMI (kg⋅m−2) | 17.3 (3.1) | 17.7 (3.3) | 18.2 (3.5) | 17.1 (3.0) |
Overweight and obese (%) | 25.8 | 24.6 | 26.2 | 24.1 |
Parental education level | 4.3 (1.4) | 4.5 (1.5) | 4.5 (1.5) | 4.5 (1.5) |
Having sibling (%) | 62.7 | 64.9 | 65.2 | 66.1 |
Marital status (% single parent) | 12.9 | 10.4 | 10.4 | 8.8 |
Wearing time (min⋅d−1) | 789 (90) | 796 (78) | 801 (90) | 793 (86) |
MVPA (min⋅d−1) | 61.5 (23.3) | 50.0 (20.4) | 45.6 (20.7) | 64.2 (22.7) |
LPA (min⋅d−1) | 323.2 (67.3) | 329.6 (62.4) | 314.8 (64.4) | 326.5 (65.8) |
ST (min⋅d−1) | 402.1 (73.2) | 414.7 (72.3) | 439.8 (80.1) | 402.9 (72.5) |
% MVPA | 8.2 (3.1) | 6.4 (2.6) | 5.9 (2.8) | 8.4 (3.0) |
% LPA | 40.8 (6.6) | 41.0 (6.4) | 38.8 (6.9) | 40.8 (6.5) |
% ST | 51.0 (8.1) | 52.5 (7.6) | 55.2 (8.3) | 50.7 (7.9) |