Social Class | Weight stable gain ≤ 2.5 kg N (%) | Weight gain >2.5 kg N (%) | Unadjusted odds ratio (95% CI) | Adjusted odds ratio* (95% CI) |
---|---|---|---|---|
I | 760 (8) | 340 (7) | 1 | 1 |
II | 3760 (39) | 1947 (38) | 1.16 (1.01 1.33) | 1.13 (0.98 1.30) |
IIIa | 1590 (17) | 847 (17) | 1.19 (1.02 1.39) | 1.21 (1.04 1.41) |
IIIb | 2014 (21) | 1102 (22) | 1.22 (1.06 1.42) | 1.16 (1.00 1.34) |
IV and V | 1431 (15) | 828 (16) | 1.29 (1.11 1.51) | 1.25 (1.07 1.46) |
P for trend | 0.002 | <0.001 |