Obstetric settings		Birth weight				p-value	OR gross	IC (95%)
		<2500 g		≥2500 g
		n = 60	%	n = 130	%
Multiparous
	Yes	16	21.6	58	78.4	0.018	2.5	[1.2 - 4.9]
	No	44	37.9	72	62.1	0.018	2.5	[1.2 - 4.9]
History of abortion
	Yes	36	43.9	46	56.1	0.001	2.7	[1.5 - 5.1]
	No	24	22.2	84	77.8	0.001	2.7	[1.5 - 5.1]
Antenatal care
	Yes	23	25.8	66	74.2	0.110	0.6	[0.3 - 1.1]
	No	37	36.6	64	63.4	0.110	0.6	[0.3 - 1.1]
History of premature labor
	Yes	41	25.8	118	74.2	<0.001	4.6	[2.0 - 10.2]
	No	19	25.6	12	74.4	<0.001	4.6	[2.0 - 10.2]