Baseline characteristics, 1996-97 | Girls, n = 1,025 | Boys, n = 631 | p-value, χ2/t-test |
---|---|---|---|
Mean age (SD*) | 14.8 (0.5) | 14.8 (0.6) | Â |
Average weight (SD) | 58.4 kg (9.7 kg) | 62.7 kg (10.8 kg) | < 0.0001 |
Mean height (SD) | 165.7 cm (6.1 cm) | 174.2 cm (7.6 cm) | Â |
Crude mean BMI (SD) (weight in kg/(height in meters2)) | 21.3 (3.2) | 20.6 (2.7) | < 0.0001 |
Age adjusted BMI according to IOTF criteria** | Â | Â | Â |
< 25 | 84.5% (866) | 84.9% (536) | 0.16 |
25 ≤ BMI< 30 | 12.4% (127) | 13.5% (85) |  |
≥30 | 3.0% (31) | 1.6% (10) |  |
Socioeconomic position, highest of the household | Â | Â | Â |
Unemployed | 5.9% (60) | 5.4% (34) | 0.73 |
Non-skilled manual worker | 7.7% (79) | 7.3% (46) | Â |
Under education | 1.5% (15) | 1.0% (6) | Â |
Skilled manual worker | 9.9% (101) | 8.9% (56) | Â |
White-collar group 3 | 19.9% (204) | 17.9% (113) | Â |
White-collar group 2 | 26.1% (267) | 26.3% (166) | Â |
White-collar group 1 | 17.7% (181) | 20.3% (128) | Â |
Self-employed | 11.5% (118) | 13.0% (82) | Â |
Total | 100% 1025 | 100% 631 | Â |
Follow-up characteristics, 2003 | Girls, n = 1,025 | Boys, n = 631 | Â |
Mean age (SD) | 21.2 (0.7) | 21.3 (0.7) | Â |
Average weight (SD) | 64.8 kg (11.0 kg) | 78.7 kg (11.5 kg) | < 0.0001 |
Mean height (SD) | 169.0 cm (6.2 cm) | 182.6 cm (6.7 cm) | < 0.0001 |
Crude mean BMI (SD) (weight in kg/(height in meters2)) | 22.7 (3.6)*** | 23.6 (3.0)*** | < 0.0001 |
BMI cut points | Â | Â | Â |
< 25 | 80.5% (825) | 75.6% (477) | 0.02 |
25 ≤ BMI< 30 | 15.1% (155) | 20.4% (129) |  |
≥30 | 4.4% (45) | 4.0% (25) |  |
Individuals becoming overweight at follow-up** | Â | Â | Â |
Yes, moved from BMI < 25 to BMI ≥25 | 11.2% (97) | 17.0% (91) | 0.002 |
No | 88.8% (769) | 83.0% (445) | Â |
Individuals becoming normal weight at follow-up | Â | Â | Â |
Yes, moved from BMI ≥25* to BMI < 25 | 35.2% (56) | 33.7% (32) | 0.80 |
No | 64.8% (103) | 66.3% (63) | Â |