From: Influence of maternal and social factors as predictors of low birth weight in Italy
Variable | OR | SE | 95% CI | p value |
---|---|---|---|---|
Outcome (very low birth weight = 1, low birth weight = 0) | ||||
Log-likelihood = -31.645, chi-square= 80.01, P value<0.0001 | ||||
Gestational age (dichotomous: 0 = ≤ 36 weeks, 1>36 weeks) | 0.005 | 0.01 | 0.001–0.16 | 0.003 |
Number of echographies (continuous) | 0.51 | 0.13 | 0.31–0.83 | 0.007 |
Education level of mother (dichotomous: 0 = mother not a high school graduate, 1 = a high school graduate or more) | 0.12 | 0.1 | 0.02–0.61 | 0.011 |
Size of municipality of residence, inhabitants (dichotomous: 0 = ≤ 90.000 i.e. small town, 1=>90.000, i.e. large town) | 0.1 | 0.1 | 0.01–0.66 | 0.017 |
Course of pregnancy (dichotomous: 0 = physiologic, 1 = pathologic) | 6.08 | 4.84 | 1.28–28.97 | 0.023 |
Occupation of mother | ||||
Work outside home | 1.0* | |||
Unemployed | 0.01 | 0.03 | 0.001–0.65 | 0.029 |
Housewife | 0.2 | 0.24 | 0.02–2.14 | 0.182 |
Marital status of mother (dichotomous: 0 = other, 1 = married) | 12.21 | 24.73 | 0.23–637.31 | 0.215 |
Maternal age | ||||
<25 | 1.0* | |||
25–29 | 3.98 | 5.1 | 0.32–49.02 | 0.282 |
30–34 | 0.49 | 0.61 | 0.04–5.66 | 0.568 |
≥ 35 | 1.22 | 1.57 | 0.1–15.12 | 0.875 |
Number of fetuses (dichotomous: 0 = single, 1 = multiple) | 2.52 | 2.38 | 0.4–15.99 | 0.325 |
Newborn sex (dichotomous: 0 = female, 1 = male) | 0.6 | 0.5 | 0.12–3.08 | 0.542 |
Number of cigarettes/day during pregnancy (continuous) | 0.8 | 0.31 | 0.37–1.71 | 0.564 |
Number of prenatal care visits (dichotomous: 0 = 0–4 not satisfactory, 1=> 4 satisfactory) | 1.48 | 1.19 | 0.31–7.17 | 0.624 |
Social support during pregnancy (dichotomous: 0 = no, 1 = yes) | 1.24 | 0.92 | 0.29–5.34 | 0.775 |
Amniocentesis (dichotomous: 0 = no, 1 = yes) | 0.78 | 0.85 | 0.09–6.56 | 0.818 |
Type of delivery (dichotomous: 0 = eutocic, 1 = caesarean) | 0.99 | 0.87 | 0.18–5.58 | 0.989 |