Table 3.
Effect of second hand smoking campaigns (2004–2010) on odds of smoke-free home, n = 9,872
| Covariate | Categories | OR (95 % CI) | p |
|---|---|---|---|
| Timea | 1.01 (1.01–1.02) | 0.005 | |
| Tobacco control campaigns | Second hand smoke GRPsa | 0.99 (0.93–1.05) | 0.740 |
| Second hand smoke GRPs (1 month)a | 1.07 (1.01–1.13) | 0.033 | |
| Second hand smoke GRPs (2 months)a | 0.98 (0.92–1.04) | 0.490 | |
| Other GRPsa | 1.02 (0.99–1.04) | 0.134 | |
| Other GRPs (1 month)a | 1.00 (0.98–1.02) | 0.755 | |
| Other GRPs (2 months)a | 1.01 (0.98–1.03) | 0.561 | |
| TCS Score | 24.5 | 1 | |
| 27 | 1.13 (0.88–1.46) | 0.334 | |
| 48 | 1.53 (1.02–2.31) | 0.041 | |
| 51 | 1.25 (0.81–1.94) | 0.320 | |
| Season | Summer | 1 | |
| Autumn | 0.97 (0.84–1.13) | 0.695 | |
| Spring | 0.86 (0.73–1.02) | 0.098 | |
| Winter | 0.84 (0.71–0.99) | 0.041 | |
| Government office region | North East | 1 | |
| North West | 0.67 (0.52–0.87) | 0.003 | |
| Yorkshire and the Humber | 0.78 (0.59–1.02) | 0.069 | |
| East Midland | 0.71 (0.54–0.93) | 0.014 | |
| West Midland | 0.85 (0.65–1.12) | 0.246 | |
| East of England | 0.91 (0.70–1.20) | 0.514 | |
| London | 0.71 (0.54–0.92) | 0.010 | |
| South East | 0.73 (0.56–0.94) | 0.017 | |
| South West | 1.08 (0.82–1.43) | 0.567 | |
| Gender of smokers in household | All female smokers | 1 | |
| All male smokers | 1.44 (1.29–1.60) | <0.001 | |
| Mixed smokers | 1.18 (0.87–1.60) | 0.280 | |
| Average age of smokers in household | 18–24 | 1 | |
| 25–39 | 0.73 (0.62–0.87) | <0.001 | |
| 40–54 | 0.51 (0.43–0.62) | <0.001 | |
| 55+ | 0.32 (0.26–0.38) | <0.001 | |
| NS-SEC of head of household | Managerial & professional | 1 | |
| Intermediate | 0.79 (0.69–0.91) | 0.001 | |
| Routine & manual | 0.64 (0.57–0.72) | <0.001 | |
| Other | 0.58 (0.43–0.77) | <0.001 | |
| Average level of dependence of smokers in household | 0 (least addicted) | 12.51 (6.67–23.45) | <0.001 |
| 1 | 5.00 (2.65–9.42) | <0.001 | |
| 2 | 3.43 (1.83–6.46) | <0.001 | |
| 3 | 2.25 (1.19–4.23) | 0.012 | |
| 4 | 1.24 (0.65–2.35) | 0.512 | |
| 5 | 0.42 (0.19–0.93) | 0.033 | |
| 6 (most addicted) | 1 | ||
| Age of youngest child in household | No child | 1 | |
| 0-5 | 2.60 (2.24–3.01) | <0.001 | |
| 6-15 | 1.34 (1.17–1.53) | <0.001 | |
| Number of adult smokers | Two or more smokers | 1 | |
| Lone smoker | 2.82 (2.12–3.77) | <0.001 | |
| Lone smoker (lives alone) | 0.83 (0.63–1.11) | 0.217 | |
| Index of Multiple deprivation | 1 (least deprived) | 1 | |
| 2 | 1.02 (0.86–1.21) | 0.839 | |
| 3 | 0.79 (0.66–0.93) | 0.006 | |
| 4 | 0.60 (0.50–0.71) | <0.001 | |
| 5 (most deprived) | 0.41 (0.34–0.50) | <0.001 |
aTime and GRPs at different lags were initially considered as nonlinear smooth terms and as they were found to be linear (spline effective degrees of freedom = 1), replaced with linear terms. The table presents the ORs for having a smoke-free home associated with a 100 point increase in GRPs. Also included in the model is a covariate for number of addresses in each PSU. Likelihood ratio test p values are not shown for categorical variables as modelling was based on quasi-likelihood