Table 1 Descriptive Analysis of Lifestyle Measures across Four Waves among Chinese Children, Mean (SD)
| Â | Wave 1 | Wave 2 | Wave 3 | Wave 4 |
|---|---|---|---|---|
Participants, nm | 1974 | 1949 | 1899 | 1795 |
Boys | 1098 (55.6) | 1078 (55.3) | 1060 (55.8) | 1001 (55.8) |
Family monthly income | ||||
  < 2000 RMB | 80 (4.1) | 79 (4.1) | 76 (4.0) | 74 (4.1) |
 2000–5000 RMB | 1061 (53.7) | 1053 (54.0) | 1021 (53.8) | 960 (53.5) |
 5000–10,000 RMB | 633 (32.1) | 621 (32.0) | 611 (32.2) | 581 (32.4) |
 10,000–15,000 RMB | 151 (7.6) | 148 (7.6) | 145 (7.6) | 138 (7.7) |
  > 15,000 RMB | 49 (2.5) | 48 (2.5) | 46 (2.4) | 42 (2.3) |
Maternal education | ||||
  < high school | 463 (23.5) | 459 (23.6) | 437 (23.0) | 405 (22.6) |
 high school | 972 (49.2) | 957 (49.1) | 937 (49.3) | 900 (50.1) |
 bachelors/ graduate | 539 (27.3) | 533 (27.3) | 525 (27.6) | 490 (27.3) |
Body mass index, kg/m2 | 16.75 ± 2.9 | 19.79 ± 3.7 | 20.26 ± 3.9 | 20.93 ± 4.0. |
ST, h/d | 2.94 (1.8) | 2.71 (2.1) § | 2.17 (1.9) § | 1.92 (1.4) § |
PA ≥1 h/d, d/w | 2.38 (1.9) | 2.63 (2.0) ‡ | 3.60 (1.8) § | 3.52 (1.7) § |
Sleep duration, h | 9.39 (0.5) | 9.16 (0.6) § | 8.53 (0.7) § | 8.06 (0.7) § |
SSBs≥1 serving, d/w | 1.51 (2.0) | 1.78 (1.8) § | 2.55 (1.9) § | – |