. 2009 Jan 16;19(2):198–205. doi: 10.1093/eurpub/ckn141

Table 6.

Summary of GEE model results for smokers and nonsmokers

Outcome	Smokers			Nonsmokers
	OR	95% CI	P-value	OR	95% CI	P-value
Visit pubs less often
Pre-law: Scotland vs. UK	1.5	1.0–2.1	0.032	0.65	0.40–1.0	0.074
Post-law: Scotland vs. UK	1.4	1.0–2.0	0.048	0.16	0.086–0.30	<0.00010
	0.032^a; 0.73^b; 0.86^c			0.074^a; 0.025^b; 0.00060^c
Visit restaurants less often
Pre-law: Scotland vs. UK	0.91	0.60–1.4	0.63	0.68	0.37–1.3	0.22
Post-law: Scotland vs. UK	1.4	0.96–2.1	0.082	0.31	0.12–0.76	0.010
	0.63^a; 0.28^b; 0.12^c			0.22^a; 0.31^b; 0.15^c

a: P-value for overall 1 d.f. test for country (UK vs. Scotland)

b: P-value for overall 1 d.f. test for wave (pre- vs. post-law)

c: P-value for 1 d.f. test for country × wave interaction. This is the key term of interest to assess the association with the Scottish smokefree law with the change in outcomes examined