Table 2 Baseline characteristics of the participantsa , b
From: The Minhang Pediatric Biobank cohort study: protocol overview and baseline characteristics
Characteristics | Sex | Total | |
|---|---|---|---|
Male | Female | ||
Age, years | 6.65 (0.28) | 6.64 (0.29) | 6.64 (0.29) |
Number of siblings | 1.38 (1.07) | 1.40 (1.06) | 1.39 (1.07) |
Height | 124.64 (5.29) | 123.07 (5.38) | 123.89 (5.39) |
Weight | 26.08 (5.42) | 24.14 (4.69) | 25.15 (5.17) |
BMI | 16.68 (2.65) | 15.83 (2.33) | 16.27 (2.54) |
Waist circumference | 56.46 (7.03) | 53.58 (5.93) | 55.07 (6.68) |
Hip circumference | 66.23 (6.45) | 64.49 (5.49) | 65.39 (6.07) |
Passive smoking exposure | |||
 Yes | 2082 (24.75) | 1929 (22.93) | 4011 (47.68) |
 No | 2230 (26.51) | 2113 (25.12) | 4343 (51.63) |
Exercise | |||
 Low | 367 (4.36) | 391 (4.65) | 758 (9.01) |
 Moderate | 3778 (44.91) | 3530 (41.96) | 7308 (86.88) |
 High | 169 (2.01) | 122 (1.45) | 291 (3.46) |
Screen use | |||
  ≤ 2 h | 3981 (47.33) | 3797 (45.14) | 7778 (92.46) |
  > 2& ≤ 4 h | 273 (3.25) | 194 (2.31) | 467 (5.55) |
  > 4& ≤ 6 h | 12 (0.14) | 13 (0.15) | 25 (0.30) |
  > 6 h | 4 (0.05) | 7 (0.08) | 11 (0.13) |
Sleep quality | |||
 Very good | 1759 (20.91) | 1619 (19.25) | 3378 (40.16) |
 Good | 1899 (22.57) | 1855 (22.05) | 3754 (44.63) |
 Average | 645 (7.67) | 567 (6.74) | 1212 (14.41) |
 Bad | 18 (0.21) | 17 (0.20) | 35 (0.42) |
Sleep time | |||
  ≤ 9 h | 1076 (12.79) | 1046 (12.43) | 2122 (25.23) |
  > 9& ≤ 10 h | 2953 (35.10) | 2742 (32.60) | 5695 (67.70) |
  > 10& ≤ 11 h | 268 (3.19) | 258 (3.07) | 526 (6.25) |
  > 11 h | 12 (0.14) | 5 (0.06) | 17 (0.20) |
House renovation during the past year | |||
 Yes | 898 (10.68) | 857 (10.19) | 1755 (20.86) |
 No | 3416 (40.61) | 3185 (37.86) | 6601 (78.47) |
Pet ownership | |||
 Yes | 729 (8.67) | 773 (9.19) | 1502 (17.86) |
 No | 3579 (42.55) | 3272 (38.90) | 6851 (81.44) |
Ventilation | |||
 Everyday | 3914 (46.53) | 3642 (43.30) | 7556 (89.82) |
 1 to 3 times/week | 346 (4.11) | 345 (4.10) | 691 (8.21) |
 1 to 5 times/month | 39 (0.46) | 48 (0.57) | 87 (1.03) |
 Seldom | 17 (0.20) | 17 (0.20) | 34 (0.40) |
 Never | 2 (0.02) | 1 (0.01) | 3 (0.04) |
Cooking and heating fuel | |||
 Coal gas | 353 (4.20) | 339 (4.03) | 692 (8.23) |
 Natural gas | 3485 (41.43) | 3253 (38.67) | 6738 (80.10) |
 Liquefied petroleum gas | 233 (2.77) | 225 (2.67) | 458 (5.44) |
 Electricity | 146 (1.74) | 129 (1.53) | 275 (3.27) |
 Coal | 6 (0.07) | 6 (0.07) | 12 (0.14) |
 Others | 4 (0.05) | 4 (0.05) | 8 (0.10) |