Table 2 Gestational weight gain patterns by smoking status
From: Are women who quit smoking at high risk of excess weight gain throughout pregnancy?
Women who never smoked (N = 405/ 1,205a) | Women who quit smoking (N = 61/ 179a) | Women who continued to smoke (N = 43/ 119a) | |
|---|---|---|---|
Unadjusted | |||
1st trimester | |||
Total trimester weight gain, kg, (95 % CI) | 1.7 (1.4, 2.1) | 1.2 (0.3, 2.1) | 3.5 (2.4, 4.6) |
Mean difference, kg (95 % CI) | Reference | −0.5 (−1.5, 0.5) | 1.8 (0.6, 3.0) |
2nd and 3rd trimester | |||
Rates of weight gain, kg/week, (95 % CI) | 0.49 (0.47, 0.51) | 0.60 (0.54, 0.65) | 0.40 (0.32, 0.45) |
Mean difference, kg/week (95 % CI) | Reference | 0.11 (0.05, 0.17) | −0.10 (−0.17,−0.03) |
Adjustedb | |||
1st trimester | |||
Total trimester weight gain, kg, (95 % CI) | 2.3 (1.5, 3.2) | 1.7 (0.5, 2.8) | 4.7 (3.2, 6.2) |
Mean difference, kg (95 % CI) | Reference | −0.7 (−1.7, 0.4) | 2.4 (1.1, 3.7) |
2nd and 3rd trimester | |||
Rates of weight gain, kg/week, (95 % CI) | 0.51 (0.46, 0.55) | 0.59 (0.53, 0.66) | 0.42 (0.34, 0.50) |
Mean difference, kg/week (95 % CI) | Reference | 0.09 (0.03, 0.15) | −0.09 (−0.16,−0.01) |