Skip to main content

Table 3 Odds ratios from logistic regression, with 95% confidence intervals, on the odds of exposure to second hand smoke at home for socioeconomic and individual factors amongst schoolchildren, Hanwella, Colombo, Sri Lanka

From: Prevalence and correlates of exposure to second hand smoke (SHS) among 14 to 15 year old schoolchildren in a medical officer of health area in 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 1.39 0.77–2.52 1.31 0.72–2.40 0.75 0.3–1.54
Age
 14 years (ref) 1   1   1  
 15 years 1.05 0.58–1.89 1.21 0.66–2.23 1.43 0.71–2.87
Ethnicity
 Non- Sinhalese (ref) 1   1   1  
 Sinhalese 1.52 0.72–3.21 1.54 0.72–3.29 1.14 0.48–2.69
Employment status of father
 Employed (ref) 1   1   1  
 Unemployed 0.65 0.14–2.98 0.59 0.13–2.74 0.33 0.05–1.99
Employment status of mother
 Employed (ref) 1   1   1  
 Unemployed 2.26** 1.21–4.22 2.32** 1.22–4.38 3.13*** 1.51–6.47
Presence of smokers in household
 Not present (ref) 1   1   1  
 Present 7.60**** 3.84–15.03 8.25**** 3.99–17.04 11.04**** 4.97–24.52
  1. Model 1: Univariable analysis
  2. Model 2: Multivariable with age, sex and ethnicity (ORs presented for age, sex and ethnicity come from models including those variables only)
  3. Model 3: Multivariable, including all variables
  4. Significance level **p < 0.01, ***p < 0.005, ****p < 0.001,
  5. OR odds ratio, CI Confidence Interval