Supplementary Table 1.

Adverse Pregnancy Outcomes and Smoking during Previous Pregnancies

		Total (n = 1123)	Smoking during Current Pregnancy			Type of Smoking during Current Pregnancy
No (n = 984)	Yes (n = 139)	P	Regular Tobacco Cigarettes (n = 105)	Electronic cigarettes (n = 34)	P
Smoking during previous pregnancy, n (%)		132 (14.4)	62 (7.8)	70 (56.0)	<.001	58 (62.4)	12 (37.5)	<.001
Previous LBWI delivery, n (%)	Yes	88 (9.6)	68 (8.6)	20 (16.1)	.013	17 (18.5)	3 (9.4)	.010
Smoking during pregnancy	40 (6.1)	20 (3.5)	20 (22.5)	<.001	16 (27.6)	4 (12.9)	<.001
Previous premature delivery, n (%)	Yes	91 (8.2)	68 (7)	23 (16.7)	<.001	21 (20.2)	2 (5.9)	<.001
Smoking during pregnancy	30 (4.7)	10 (1.8)	20 (23.5)	<.001	17 (31.5)	3 (9.7)	<.001
Previous stillbirth, n (%)	Yes	120 (13.2)	92 (11.7)	28 (22.8)	.002	20 (22)	8 (25)	.003
Smoking during pregnancy	44 (6.8)	17 (3)	27 (31.4)	<0.001	21 (38.2)	6 (19.4)	<.001

LBWI, low birth weight infant. Values in bold indicate statistical significance (P < .05).

χ² test.