Influence of perinatal factors on full-term low-birth-weight infants and construction of a predictive model

Table 2 Results of multivariate logistic regression analysis

Variable	β	SE	χ2	P value	OR (95%CI)
Low level of maternal education	0.348	0.134	6.744	0.012	1.416 (1.058–2.975)
Low number of prenatal examinations	1.067	0.282	14.316	< 0.001	2.907 (1.893–6.278)
Insufficient weight gain during pregnancy	1.307	0.329	15.782	< 0.001	3.695 (2.092–7.455)
Irregular calcium supplementation during pregnancy	0.563	0.204	7.617	0.009	1.756 (1.146–3.984)
Pregnancy hypertension syndrome	0.785	0.226	12.065	< 0.001	2.192 (1.423–5.159)
Constant	−29.164	6.574	19.680	< 0.001	-