the weight gain of the smokers was 200 g less than that of the controls matched with them for age , parity , place or residence and marital status , but the difference in birth weight and placental weight accounted for about 85 % of the total sample in order to quantify the separate and joint contributions to birth weight of smoking , maternal weight gain , pre-pregnant weight , height and duration of gestation .
C0005612
birth weight
C0005910
weight