Table 3 Determinants of passive smoking using the univariate and multivariate logistic regression models on three phases of CASPIANs (III, IV and V)
Variables | Crude OR (%95 CI) | P-Value | Adjusted OR (%95 CI) | P-Value |
|---|---|---|---|---|
Age | ||||
 7–10 yrs. | (Reference) | (−) | (−) | (−) |
 11–14 yrs. | 0.97 (0.91–1.02) | 0.208 | (−) | (−) |
 15–18 yrs. | 1.04 (0.98–1.10) | 0.228 | (−) | (−) |
Gender | ||||
 Boy | (Reference) | (−) | (−) | (−) |
 Girl | 1.03 (0.98–1.07) | 0.247 | (−) | (−) |
Place of residence | ||||
 Urban | (Reference) | (−) | (−) | (−) |
 Rural | 1.01 (0.97–1.07) | 0.578 | (−) | (−) |
Father’s occupation | ||||
 Unemployed | (Reference) | (−) | (Reference) | (−) |
 Worker/Employee | 0.91 (0.83–1.01) | 0.066 | 1.04 (0.93–1.16) | 0.475 |
 Self-employed | 1.05 (0.95–1.16) | 0.342 | 1.14 (1.02–1.28) | 0.019 |
Mother’s occupation | ||||
 Housewife | (Reference) | (−) | (Reference) | (−) |
 Worker/Employee | 0.68 (0.63–0.74) | < 0.001 | 0.84 (0.75–0.94) | 0.003 |
 Other | 1.31 (1.15–1.49) | < 0.001 | 1.63 (1.41–1.88) | < 0.001 |
Father’s education | ||||
 Illiterate | (Reference) | (−) | (Reference) | (−) |
 High school diploma or lower | 1.05 (0.98–1.13) | 0.139 | 1.07 (0.98–1.17) | 0.135 |
 Bachelor degree or higher | 0.62 (0.57–0.68) | < 0.001 | 0.73 (0.65–0.83) | < 0.001 |
Mother’s education | ||||
 Illiterate | (Reference) | (−) | (Reference) | (−) |
 High school diploma or lower | 0.97 (0.92–1.03) | 0.344 | 1.05 (0.97–1.16) | 0.221 |
 Bachelor degree or higher | 0.72 (0.65–0.79) | < 0.001 | 1.10 (0.96–1.26) | 0.173 |
Family members | ||||
  ≤ 4 or less | (Reference) | (−) | (−) | (−) |
  ≥ 5 or more | 0.98 (0.94–1.03) | 0.478 | (−) | (−) |
Life satisfaction | ||||
 Dissatisfied | (Reference) | (−) | (Reference) | (−) |
 Satisfied | 0.70 (0.67–0.74) | < 0.001 | 0.71 (0.67–0.75) | < 0.001 |
Socioeconomic status of family | ||||
 Weak | (Reference) | (−) | (Reference) | (−) |
 Moderate | 0.98 (0.92–1.03) | 0.382 | 0.92 (0.86–0.98) | 0.015 |
 Good | 0.78 (0.74–0.83) | < 0.001 | 0.83 (0.77–0.89) | < 0.001 |
Socioeconomic status of place of residence | ||||
 Southeast | (Reference) | (−) | (Reference) | (−) |
 North & north east | 0.95 (0.87–1.04) | 0.264 | 1.02 (0.93–1.12) | 0.714 |
 West | 1.15 (1.07–1.24) | < 0.001 | 1.22 (1.12–1.32) | < 0.001 |
 Central | 1.20 (1.11–1.30) | < 0.001 | 1.31 (1.20–1.44) | < 0.001 |
Physical activity | ||||
 Light | (Reference) | (−) | (Reference) | (−) |
 Moderate | 0.93 (0.88–0.98) | 0.008 | 0.95 (0.90–1.01) | 0.110 |
 Intense | 0.95 (0.90–1.01) | 0.085 | 1.02 (0.96–1.09) | 0.461 |
ST | ||||
 2 h or less | (Reference) | (−) | (Reference) | (−) |
 More than 2 h | 1.06 (1.00–1.13) | 0.037 | 1.00 (0.94–1.06) | 0.913 |