Table 2. Impact of smoke-free legislation on primary outcomes.

Country	Asthma			Respiratory tract infections
	IRR	95% CI	p-value	IRR	95% CI	p-value
England	0.94	0.81–1.09	0.412	0.95	0.86–1.06	0.399
Scotland	0.99	0.83–1.19	0.946	0.96	0.83–1.12	0.620
Wales	1.09	0.89–1.35	0.406	0.97	0.86–1.09	0.641
Northern Ireland	0.96	0.76–1.22	0.745	0.90	0.79–1.03	0.132

See Supplementary Table S1 online for details of the variables included in each model. IRR = incidence rate ratio; CI = confidence interval.