Table 4.

Multivariate logistic analyses showing the outcomes associated with term low birth weight

Variable		Reference	P	Crude OR	Adjusted ORa	95%CI
Passive smoking	Yes	No	0.019	1.356	1.404	1.057–1.864
Gestational gain	Less	Normal	0.009	1.659	1.484	1.103–1.998
	More		< 0.001	0.431	0.369	0.236–0.577
Economic status (Ұ/month)	3001–5000	≤3000	0.032	0.669	0.715	0.526–0.971
	5001–7000		0.104	0.576	0.687	0.437–1.080
	> 7000		0.026	0.391	0.526	0.299–0.926
Pre-pregnancy BMI	< 18.5	18.5–23.9	< 0.001	2.008	1.718	1.278–2.310
	24–27.9		0.826	0.965	1.065	0.607–1.868
	≥28		0.569	1.079	1.409	0.433–4.579
Parity	>1	1	< 0.001	0.535	0.506	0.368–0.695
History of LBW	Yes	No	< 0.001	3.728	4.087	2.070–8.069
Antenatal care	5–9	≤4	0.344	0.664	0.808	0.519–1.257
	10–14		0.014	0.425	0.557	0.349–0.889
	≥15		0.024	0.222	0.305	0.108–0.858
Gestational hypertension	Yes	No	< 0.001	4.600	6.598	3.915–11.122

note: OR odds ratio; CI confidence interval; LBW low birth weight; BMI body mass index; Control normal weight term baby

^aVariables in the logistic regression include maternal characteristics, pre-pregnancy BMI, parity, history of LBW, antenatal care, fetal sex, and gestational hypertension