Table 3. Hazard Ratios (HR) and corresponding 95% Confidence Intervals (95%CI) of incident mortality for cases using the control group as a reference category.

	All-Cause Mortality			Respiratory Mortality			Cardiovascular Mortality
Time	HR	95% CI	P Value	HR	95% CI	P Value	HR	95% CI	P Value
Total	4.0	3.4-4.7	<0.001	20.4	11.7-35.8	<0.001	2.6	2.0-3.5	<0.001
≥30 days <1 year	7.3	5.4-9.9	<0.001				5.9	3.5-9.7	<0.001
≥ 1year	2.8	2.3-3.4	<0.001	16.4			1.6	1.1-2.3	0.02
					8.9-30.1	<0.001

Covariates adjusted are smoking status, pack years, physical activity levels, waist to hip ratio, diabetes mellitus, prevalent cardiovascular disease and prevalent respiratory disease for all modes of mortality and all time frames. Matching is account for by a shared frailty term of each matched-set.