Table 2.

Sources of secondhand smoke exposure and policies during pregnancy by women's smoking status

Indicatora	Total		Nonsmokerb		Smokerb		P valuec
	N %	(95 % CI)	N	%	N	%
Smoke-free home rule
Yes	2,236	65.6 (61.5–69.8)	1,667	73.0	485	48.2	<.0001
No	1,170	34.4 (30.2–38.5)	617	27.0	501	50.8
Partner smokes
Yes	1,407	43.4 (41.1–45.8)	743	34.1	589	63.5	<.0001
No	1,832	56.6 (54.2–58.9)	1,438	65.9	338	36.5
Number of smokers in householdd
None	1,634 47.7 (44.2–51.2)		1,288	56.2	293	29.6	<.0001
1	1,188 38.9 (36.1–11.7)		755	32.9	514	51.9
2	299 8.7 (7.5–10.0)		169	7.4	113	11.4
3+	161 4.5 (3.8–5.6)		80	3.5	71	7.2
Smoke-free workplace policye
Yes	327	61.9 (57.4–66.4)	240	64.3	87	56.1	0.1858
No	201	38.1 (33.6–42.6)	133	35.7	68	43.9
Exposure to smoke at work in the last 30 dayse
Yes	105	21.6 (16.9–26.2)	67	19.5	38	26.4	0.0343
No	382	78.4 (73.8–83.1)	276	80.5	106	73.6
How often around smokers (home, work, public places)
Never	788	23.7 (16.9–30.5)	627	28.2	142	14.7	0.0001
Rarely	903	27.2 (21.0–33.3)	710	31.9	153	15.9
Sometimes	1,102	33.1 (30.4–35.9)	655	29.4	385	40.0
Always	534	16.1 (13.6–18.5)	235	10.6	283	29.4

CI confidence interval

^aSample size varied by each item due to missing values, ranging from 0.6 % (smoke-free home rule) to 5.5 % (partner smokes)

^bSmoking status was missing for 144 women (4.2 %)

^cChi square tests were used to assess differences between nonsmokers and smokers

^dExcludes the pregnant smoker

^eExposure to smoke at work was calculated only among women who reported working outside of the house (n = 528)