Table 5

Adjusted relative risk ratios for changes in susceptibility in relation to noticing point-of-sale displays, frequency of visiting shops and number of brands recognised between 2011–2012 and 2012–2013

	Among susceptible never-smokers at baseline 2011–2012						Among susceptible never-smokers at baseline 2012–2013
	RRR of becoming non-susceptible			RRR of becoming an ever-smoker			RRR of becoming non-susceptible			RRR of becoming an ever-smoker
	Estimate	99% CI	p Value	Estimate	99% CI	p Value	Estimate	99% CI	p Value	Estimate	99% CI	p Value
Noticing point-of-sale displays in large shops
Sometimes or less	1.00			1.00			1.00			1.00
Most or every time	0.84	0.32 to 2.18	0.635	0.97	0.34 to 2.72	0.935	0.52*	0.22 to 1.23	0.05	1.85*	0.63 to 5.45	0.144
Frequency of visiting large shops
Less than 2 or 3 times a week	1.00			1.00			1.00			1.00
At least 2 or 3 times a week	1.04	0.41 to 2.68	0.910	0.75	0.27 to 2.06	0.468	0.74*	0.33 to 1.68	0.344	0.54*	0.24 to 1.24	0.056
Noticing point-of-sale displays in small shops
Sometimes or less	1.00			1.00			1.00			1.00
Most or every time	0.51	0.17 to 1.53	0.113	1.34	0.34 to 5.27	0.557	0.52*	0.22 to 1.23	0.050	1.85*	0.63 to 5.45	0.144
Frequency of visiting small shops
Less than 2 or 3 times a week	1.00			1.00			1.00			1.00
At least 2 or 3 times a week	1.14	0.46 to 2.82	0.716	0.35	0.12 to 1.02	0.012	0.79*	80.30 to 2.08	0.532	1.38*	0.46 to 4,15	0.457
Number of brands recognised
None	1.00			1.00			1.00			1.00
1–5	0.98	0.29 to 3.26	0.958	2.00	0.39 to 10.15	0.272	0.40*	0.13 to 1.20	0.031	1.07*	0.28 to 4.09	0.890
More than 5	0.57	0.15 to 2.23	0.293	2.66	0.52 to 13.60	0.123	0.53*	0.10 to 2.74	0.317	1.83*	0.51 to 6.62	0.227

*The final model was based on univariate relationship.
RRR, relative risk ratios.