Abstract

In a multicentre prospective study, we have determined the incidence of low birthweight (LBW) and the main predisposing risk factors. Among 4651 consecutive births over a 5-month period in five hospitals in Riyadh, the overall incidence of LBW was 8.4%. When stillbirths were excluded the incidence of LBW was 7.4% of all live births. Statistical analysis was performed among 638 births (319 LBW infants, i.e. less than or equal to 2499 g and 319 babies weighing 2500 g or more). Of the 28 antenatal risk variables analysed, 13 were found to be significant when studied separately. Of these 13 variables, six were found to be significant predictors of LBW, using stepwise multiple logistic regression. These six variables together correctly predicted 72% and 88% of the LBW babies or normal birthweight babies, respectively. The risk factors thus identified were (i) short gestation, (ii) multiple gestation, (iii) low maternal body mass index, (iv) nulliparity, (v) availability of housework help, and (vi) absence of consanguinity. Measures for reducing these factors are also discussed.

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