Table 1.
Background descriptive factors by groups of under‐/normal‐weight (UW/NW) and overweight/obese (OW/OB) with mean (SD), if not indicated otherwise
| UN/NW (BMIz ≤ +1), n = 851 | OW/OB (BMIz > +1), n = 291 | ||||
|---|---|---|---|---|---|
| Mean | SD | Mean | SD | P‐valuea | |
| Age, y | 11.3 | (0.2) | 11.3 | (0.2) | .335 |
| Weight, kg | 37.1 | (5.0) | 50.7 | (7.8) | <.001 |
| Height, cm | 147.9 | (6.6) | 151.2 | (6.6) | <.001 |
| BMI, kg/m2 | 16.9 | (1.5) | 22.1 | (2.4) | <.001 |
| BMI z‐score | −0.1 | (0.7) | 1.6 | (0.5) | <.001 |
| Waist, cm | 63.4 | (4.8) | 75.8 | (8.2) | <.001 |
| Waist‐to‐height ratio | 0.43 | (0.03) | 0.50 | (0.05) | <.001 |
| Parental BMI, kg/m2 (n = 949) | 24.4 | (4.3) | 26.4 | (4.4) | <.001 |
| Weighted GRS of WHR, z‐scored | 0.01 | (1.0) | −0.04 | (1.0) | .393 |
| Weighted GRS BMI, z‐scored | −0.08 | (1.0) | 0.23 | (1.0) | <.001 |
| n | % | n | % | ||
| Gender | .001b | ||||
| Girls | 451 | 53.0 | 122 | 41.9 | |
| Boys | 400 | 47.0 | 169 | 58.1 | |
| Parental language (n = 1109) | .483b | ||||
| Finnish | 753 | 91.2 | 254 | 89.8 | |
| Swedish | 54 | 6.5 | 24 | 8.5 | |
| Other | 19 | 2.3 | 5 | 1.8 | |
| Eating habit (n = 1033) | .387b | ||||
| Unhealthy | 101 | 13.1 | 38 | 14.4 | |
| Vegetable and fruit avoider | 330 | 42.9 | 122 | 46.4 | |
| Healthy | 339 | 44.0 | 103 | 39.2 | |
| Leisure time physical activity (n = 1131) | .019b | ||||
| <7 h per week | 368 | 43.6 | 148 | 51.6 | |
| 7 h per week or more | 476 | 56.4 | 139 | 48.4 | |
| Sleep duration during week (n = 1083) | .474b | ||||
| Less than recommended | 26 | 3.2 | 13 | 4.7 | |
| Recommended | 781 | 96.5 | 260 | 94.9 | |
| More than recommended | 2 | 0.2 | 1 | 0.4 | |
Abbreviations: BMI, body mass index; WHR, waist‐to‐hip ratio; GRS, genetic risk score.
a
t test.
b
Chi‐square test.