Risk factors for low birthweight in the public-hospitals at Peshawar, NWFP-Pakistan

Table 3 Adjusted odds ratios and 95% confidence intervals for the final logistic regression model.

Factors	B	AdjOR (95% CI)	PPr. of LBW	S. E.
Nationality
Afghan refugee	0.970	2.64 (1.39, 5.01) **	0.17	0.032
Local (Ref.)	-	-	0.09	0.009
Consanguinity
Consanguineous	0.871	2.39 (1.39, 4.12)**	0.12	0.012
Non-consanguineous (Ref.)	-	-	0.06	0.012
Maternal age
<20 years	2.122	8.35 (4.36, 15.98) **	0.32	0.048
>34 years	0.099	1.11(0.58, 2.11)	0.08	0.019
20–34 years (Ref.)	-	-	0.08	0.009
Interactions
Area × anaemia
[Tribal area] [Anaemia (yes)]	1.198	3.31(1.70, 6.50)**	0.20	0.035
[Tribal area] [Anaemia (no)]	-0.134	0.88(0.40, 1.90)	0.08	0.021
[Settled area] [Anaemia (yes)]	-0.106	0.90(0.49, 1.65)	0.08	0.015
[Settled area] [Anaemia (no)] (Ref.)	-	-	0.09	0.013
Gestation × Abortion/miscarriage
[Preterm] [Abortion/miscarriage (yes)]	2.399	11.01(5.00, 24.23)**	0.25	0.052
[Preterm] [Abortion/miscarriage (no)]	2.350	10.49(5.73, 19.20)**	0.25	0.032
[Full term] [Abortion/miscarriage (yes)]	1.209	3.35(1.66, 6.77)**	0.11	0.023
[Full term] [Abortion/miscarriage (no)] (Ref.)		-	0.04	0.008
Intercept	-4.530**

**p < 0.01, *p < 0.05, Ref. (Reference Category), AdjOR (Adjusted Odds Ratios), C.I (Confidence Interval), PPr. (the predicted probability of LBW from the model, or prediction for the probability of LBW in future), and S.E. (Standard Error of the predicted probability).