Table 5. Factors affecting second-hand smoke exposure among the non-smokers at all three places (home, workplace, and any of the public places), as per GATS I& II, India.

	SHS exposure at all three places Adjusted Prevalence Ratio (95% CI)
	GATS-I	GATS–II
Age Groups
Between 15–30 years	1.3 (1.0–1.6)	1.4 (1.1–1.7)
Between 31–45 years	1.1 (0.8–1.3)	1.2 (0.9–1.4)
Above 45 years	1	1
Sex
Male	1.0 (0.9–1.2)	1.5 (1.2–1.8)
Female	1	1
Education
No formal education	1.4 (1.1–1.9)	1.6 (1.2–2.1)
Less than primary	1.6 (1.2–2.2)	2.5 (1.9–3.4)
Primary but less than secondary	1.6 (1.3–1.9)	1.7 (1.4–2.1)
Secondary and above	1	1
Employment
Govt/ Pvt. Employees	1	1
self employed	1.2 (1.0–1.4)	1.5 (1.3–1.9)
Student	0.7 (0.4–1.0)	1.1 (0.7–1.8)
Homemaker	0.7 (0.5–1.1)	1.3 (0.8–2.2)
Unemployed	1.1 (0.7–1.8)	1.9 (1.1–3.1)
Place of residence
Urban	1	1
Rural	1.6 (1.2–1.7)	1.3 (1.1–1.5)
Wealth-index quintile
Poor	1.4 (1.2–1.8)	0.8 (0.6–1.0)
Middle	1.2 (0.9–1.5)	0.9 (0.7–1.1)
Rich	1	1
Region
North	5.6 (3.9–8.1)	10.6 (6.7–16.9)
Central	7.9 (5.4–11.7)	12.4 (7.7–19.9)
East	3.2 (2.1–5.0)	6.4 (3.8–10.6)
North East	7.2 (4.9,–10.4)	9.1 (5.6–14.5)
West	3.3 (2.2–4.9)	3.4 (1.9–5.9)
South	1	1
Knowledge smoking cause stroke
Yes	1	1
No	1.1 (0.9–1.4)	1.1 (0.9–1.4)
Knowledge smoking cause a heart attack
Yes	1	1
No	0.9 (0.8–1.2)	0.9 (0.7–1.2)
Knowledge of smoking lung cancer
Yes	1	1
No	1.1 (0.7–1.6)	0.5 (0.3–0.9)
Knowledge smoking causes serious illness
Yes	1	1
No	0.9 (0.5–1.4)	0.5 (0.3–0.8)