Table 3 Age adjusted hazard ratio (HR) with 95% confidence interval (CI) for mortality from obstructive lung disease and pneumonia as underlying causes of death by respiratory symptom, sex, occupational exposure, and smoking habits in Norway, 1973–2002: one model.

Symptoms	Obstructive lung disease (n = 250)				Pneumonia (n = 293)
	Men		Women		Men		Women
	HR	95% CI	HR	95% CI	HR	95% CI	HR	95% CI
No respiratory symptoms	1.0		1.0		1.0		1.0
Cough symptoms	2.3	1.5 to 3.7	1.5	0.9 to 2.5	1.5	0.9 to 2.5	1.2	0.8 to 1.8
Asthma‐like symptoms	2.0	1.3 to 3.0	4.0	2.3 to 7.1	0.8	0.5 to 1.4	1.4	0.9 to 2.1
Moderate dyspnoea	1.5	1.0 to 2.4	1.1	0.6 to 2.0	0.8	0.3 to 1.7	0.6	0.4 to 1.1
Severe dyspnoea	3.3	2.1 to 5.3	2.8	1.6 to 4.8	1.2	0.4 to 3.5	1.2	0.7 to 2.1
Occupational exposure
No	1.0		1.0		1.0		1.0
Yes	1.4	1.1 to 2.1	0.7	0.4 to 1.3	0.8	0.5 to 1.3	0.9	0.5 to 1.5
Smoking
Never	1.0		1.0		1.0		1.0
Former	7.4	1.7 to 31.8	0.6	0.1 to 2.7	1.5	0.7 to 2.6	1.6	1.0 to 2.6
Current (g tobacco/day)
<10	7.9	1.8 to 35.2	2.6	1.3 to 5.2	1.5	0.7 to 3.3	1.1	0.7 to 1.8
10–19	13.0	3.1 to 53.6	5.2	2.9 to 9.4	1.8	0.9 to 3.4	1.2	0.7 to 1.9
⩾20	19.9	4.8 to 83.2	5.9	2.7 to 13.0	2.1	1.0 to 4.7	2.7	1.2 to 5.7
p trend for daily smoking	<0.001		<0.001		0.04		0.08