Results of GEE models estimating the change in HSB prevalence for baseline smokers and for continuing smokers*
| Pattern of change | Presence of HSB among baseline smokers | Presence of HSB among continuing smokers | |
| OR (95% CI) | OR (95% CI) | ||
| Ireland versus UK | Follow-up versus baseline | ||
| Ireland | 1.53 (1.24 to 1.90) | 1.26 (0.97 to 1.65) | |
| UK | 1.29 (1.11 to 1.50) | 1.07 (0.91 to 1.26) | |
| Ireland × wave interaction | 1.19 (0.92 to 1.54) | 1.16 (0.86 to 1.61) | |
| France versus UK | Follow-up versus baseline | ||
| France | 1.53 (1.32 to 1.78) | 1.40 (1.18 to 1.66) | |
| UK | 1.29 (1.11 to 1.49) | 1.07 (0.91 to 1.26) | |
| France × wave interaction | 1.17 (0.96 to 1.47) | 1.31 (1.04 to 1.66) | |
| Germany versus UK | Follow-up versus baseline | ||
| Germany | 1.61 (1.42 to 1.81) | 1.55 (1.37 to 1.76) | |
| UK | 1.29 (1.11 to 1.50) | 1.07 (0.91 to 1.26) | |
| Germany × wave interaction | 1.25 (1.03 to 1.51) | 1.45 (1.17 to 1.79) | |
| Netherlands versus UK | Follow-up versus baseline | ||
| Netherlands | 1.34 (1.20 to 1.51) | 1.22 (1.08 to 1.38) | |
| UK | 1.29 (1.11 to 1.50) | 1.07 (0.90 to 1.26) | |
| Netherlands × wave interaction | 1.05 (0.86 to 1.27) | 1.15 (0.93 to 1.42) | |
↵* Models adjusted for socio-demographic time-invariant covariates (age, gender, education, country) and for time-varying covariates (age of youngest child in the household, marital status, wave) and included country × wave interaction terms. The ORs reported for each country estimate the change in HSB prevalence odds between the two waves. The interaction ORs are the ratios of these estimates and were used to assess if the change in the respective intervention country was statistically significantly different from the change in the no-legislation control country (UK w/o Scotland). In this table, an interaction OR >1 indicates that the change was greater in the intervention country compared to the control country.
GEE, Generalised Estimating Equation; HSB, home smoking ban.