The impact of multiple interventions to reduce household exposure to second-hand tobacco smoke among women: a cluster randomized controlled trial in Kalutara district, Sri Lanka

Table 2 Comparison of proportions exposed to SHS at their home

Outcomes	Intervention group (n = 329)		Control group (n = 309)		Significance
	Pre	Post	Pre	Post
	n (%) significance		n (%) significance
Exposure to SHS in their households within last 7 days	62 (19.0)	30 (9.2)	53 (17.3)	47 (15.3)	pre p₂ = 0.58
	62 (19.0)	30 (9.2)	53 (17.3)	47 (15.3)	post p₂ = 0.02
	p₁ < 0.001		p₁ = 0.51
Exposure to SHS in their households within last 30 days	79 (24.3)	44 (13.6)	70 (22.9)	65 (21.6)	pre p₂ = 0.67
	79 (24.3)	44 (13.6)	70 (22.9)	65 (21.6)	post p₂ = 0.008
	p₁ < 0.001		p₁ = 0.70

Data missing: intervention (pre3, post 3), control (pre 3,post 2)
p₁ = McNemar test, between pre and post intervention group and control group
p₂ = Chi Square tests, between intervention group and control group pre and post

ISSN: 1471-2458