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Table 1 Descriptive Analysis of Lifestyle Measures across Four Waves among Chinese Children, Mean (SD)

From: Joint trajectories of life style indicators and their links to psychopathological outcomes in the adolescence

  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) §
  1. Abbreviations: ST screen time, PA physical activity, SSBs sugar-sweetened beverages
  2. P < 0.05; ‡ P < 0.01; § P < 0.001