Table 2

Results of the segmented regression analysis for current smoking presenting the trend in smoking previous to the introduction of the PoS display ban, the immediate step level change in smoking prevalence, and the change in the smoking trend after the PoS ban was introduced compared with the preban period trend

	Trend pre-PoS display ban			Step level change			Change in trend
	Percentage change	95% CI	p Value	Percentage change	95% CI	p Value	Percentage change	95% CI	p Value
Log binomial models
Model 0: unadjusted	0.15	−1.04 to 1.63	0.846	−2.30	−6.19 to 1.76	0.263	−0.53	−0.73 to −0.33	<0.001
Model 1: +sociodemographics*	−0.93	−2.31 to 0.47	0.190	−2.25	−5.96 to 1.61	0.249	−0.21	−0.40 to −0.02	0.029
Model 2: +e-cigarettes	−1.68	−3.19 to −0.14	0.032	−4.54	−8.66 to −0.22	0.039	−0.41	−0.67 to −0.15	0.002
Model 3: +seasonality	−2.07	−3.59 to −0.52	0.009	−3.69	−7.94 to 0.75	0.102	−0.46	−0.72 to −0.20	0.001
Poisson models
Model 0: unadjusted	0.14	−2.04 to 2.37	0.902	−1.94	−7.77 to 4.26	0.531	−0.53	−0.82 to −0.24	<0.001
Model 1: adjusted for seasonality	−0.21	−2.34 to 1.96	0.849	−0.49	−6.35 to 5.73	0.874	−0.56	−0.84 to −0.27	<0.001
Model 2: +autocorrelation	−0.23	−2.21 to 1.80	0.826	−0.46	−5.95 to 5.34	0.873	−0.56	−0.82 to −0.29	<0.001

Significant associations are indicated in bold (p<0.05).
*Age, gender and social grade.
PoS, point of sale.