Table 2.

Self-Reported Secondhand Smoke (SHS) Exposure, Knowledge, and Attitudes for Nonsmoking Pregnant Women Living With a Smoking Husband at Baseline, Post-Intervention, and After Birth in Sichuan Province, China

Variable	Intervention group					Control group
	Baseline n = 526 (%)	Post- intervention n = 484 (%)	Three months after birth n = 456 (%)	P a	P b	Baseline n = 655 (%)	Post- intervention n = 569 (%)	Three months after birth n = 523 (%)	P a	P b
Past week total daily average exposure
No exposure c	26.8	79.3	77.9	<.001	.015	23.4	52.7	52.6	<.001	.007
15–59 min	37.6	12.8	17.8			41.4	27.3	33.6
≥60 min	35.6	7.9	4.3			35.2	20.0	13.8
Past week home daily average exposure
No exposure d	44.5	86.5	81.2	<.001	.001	40.5	58.7	53.3	<.001	.014
15–59 min	37.6	7.9	15.1			39.4	30.4	38.4
≥60 min	17.9	5.6	3.7			20.1	10.9	8.3
Husband’s daily cigarette consumption
Under 5	22.6	39.5	36.8	<.001	.83	19.7	19.7	15.5	<.001	.001
5–9	22.7	24.8	24.8			28.7	24.8	18.8
10–14	24.2	16.7	19.1			21.4	23.7	34.4
15–19	20.3	7.9	8.8			20.0	15.3	12.8
Over 20	10.2	11.1	10.5			10.2	16.5	18.5
Household smoking rule
Smoking allowed in all parts of the home	48.3	20.0	21.3	<.001	.23	59.2	41.7	53.4	.06	.37
Smoking allowed in some parts of the home	35.6	33.1	37.3			28.1	41.7	29.8
Smoking not allowed in any part of the home	16.1	46.9	41.4			12.7	16.6	16.8
Scores of SHS knowledge (mean ± SD )	5.6±4.1	15.0±7.4	14.3±6.9	<.001	.16	5.4±3.6	7.3±5.0	7.3±4.8	<.001	.92
Attitudes towards SHS
Indifferent	6.1	2.1	2.9	.001	.64	7.0	6.2	47.4	<.001	<.001
Dislike	46.0	37.2	38.6			39.5	40.6	42.1
Strongly dislike	47.9	60.7	58.5			53.5	53.2	10.5

^a Three months after birth compared to baseline.

^b Post-intervention compared to 3 months after birth.

^c P < .001 for past week total “no SHS exposure” between intervention and control at 3 months after birth.

^d P < .001 for past week home “no SHS exposure” between intervention and control at 3 months after birth.