Table 4 Odds ratios from logistic regression, with 95% confidence intervals, on the odds of exposure to second hand smoke in public places for socioeconomic and individual factors amongst schoolchildren, Hanwella, Colombo, Sri Lanka
Factors | Model 1 OR Univariate | 95% CI | Model 2 OR (+Age Sex Ethnicity) | 95% CI | Model 3 OR (All factors) | 95% CI |
|---|---|---|---|---|---|---|
Sex | ||||||
Male (ref) | 1 | 1 | 1 | |||
Female | 1.32 | 0.79–2.20 | 1.41 | 0.83–2.38 | 1.12 | 0.63–1.98 |
Age | ||||||
14 years (ref) | 1 | 1 | 1 | |||
15 years | 1.31 | 0.78–2.19 | 1.21 | 0.71–2.05 | 1.38 | 0.78–2.41 |
Ethnicity | ||||||
Sinhalese (ref) | 1 | 1 | 1 | |||
Non-Sinhalese | 1.88* | 1.08–3.29 | 1.76 | 0.98–3.13 | 2.34** | 1.26–4.36 |
Employment status of father | ||||||
Employed (ref) | 1 | 1 | 1 | |||
Unemployed | 1.32 | 0.44–3.93 | 1.51 | 0.49–4.65 | 1.52 | 0.46–4.96 |
Employment status of mother | ||||||
Employed (ref) | 1 | 1 | 1 | |||
Unemployed | 1.77 | 1.00–3.12 | 1.83* | 1.02–3.29 | 2.01* | 1.09–3.67 |
Presence of smokers in household | ||||||
Not present (ref) | 1 | 1 | 1 | |||
Present | 2.57*** | 1.35–4.91 | 2.75*** | 1.39–5.42 | 2.52** | 1.24–5.10 |