Male (n = 762) | Female (n = 803) | |||||
---|---|---|---|---|---|---|
Maternal smoking | Rate (%) | OR (95% CI)a | Adjusted mean of birth weight, g (95% CI)a | Rate (%) | OR (95% CI)a | Adjusted mean of birth weight, g (95% CI)a |
None | 7.1 (n = 703) | 1.00 | 3058.8 (3034.3 − 3083.3) | 8.0 (n = 724) | 1.00 | 2964.3 (2941.4 − 2987.3) |
First trimester only | 7.1 (n = 28) | 1.02 (0.16 − 3.81) | 3054.9 (2930.2 − 3179.5) | 2.3 (n = 43) | 0.24 (0.01 − 1.22) | 3004.2 (2906.8 − 3101.5) |
Second and/or third trimesters but not throughout | 12.5 (n = 8) | 1.67 (0.08 − 11.08) | 2981.7 (2748.3 − 3215.0) | 15.0 (n = 20) | 2.14 (0.48 − 6.92) | 2919.5 (2780.2 − 3058.9) |
Throughout | 21.7 (n = 23) | 4.21 (1.26 − 12.14) | 2909.6 (2771.0 − 3048.2) | 12.5 (n = 16) | 1.51 (0.23 − 5.96) | 2781.9 (2625.9 − 2937.9) |
P for trend | 0.03 | 0.04 | 0.61 | 0.09 |