Skip to main content

Table 1 Characteristics of the non-overweight and overweight groups

From: Number of siblings, birth order, and childhood overweight: a population-based cross-sectional study in Japan

Variables Non-overweight (N = 3370) n(%) Overweight (N = 656) n(%) Pvaluea
Sex
 Boys 1705 (50.6) 382 (58.2) <0.001
 Girls 1665 (49.4) 274 (41.8)
Age (years) 9.0 (9.36)b (n = 3370) 9.0 (9.37)b (n = 656) 0.607
Birth weight (g)
 <2500 348 (10.3) 53 (8.1) <0.001
 2500-2999 1140 (33.8) 180 (27.4)
 3000-3499 1417 (42.1) 289 (44.1)
 3500-3999 427 (12.7) 114 (17.4)
 4000+ 38 (1.1) 20 (3.1)
Exercise
 None 654 (19.9) 153 (24.1) <0.001
 Sometimes 902 (27.5) 199 (31.3)
 Daily 1725 (52.6) 283 (44.6)
Skipping breakfast
 Yes 120 (3.6) 19 (2.9) 0.390
 No 3239 (96.4) 636 (97.1)
Eating speed
 Fast 481 (14.4) 215 (33.5) <0.001
 Medium 1903 (57.1) 356 (55.5)
 Slow 947 (28.4) 71 (11.1)
Sleeping hours
 10.0+ 491 (15.2) 83 (13.3) 0.075
 9.0-9.9 1963 (60.7) 363 (58.1)
 8.0-8.9 709 (21.9) 160 (25.6)
 <8.0 69 (2.1) 19 (3.0)
  1. aChi-squared test or Wilcoxon rank-sum test.
  2. bValues are median (mean).