Table S1.

Risk factors and adjusted relative risk of incident COPD^a

Risk factors	Total		Male		Female
	Adjusted relative riska	95% CI	Adjusted relative riska	95% CI	Adjusted relative riska	95% CI
Age
<60 years	Reference	Reference	Reference	Reference	Reference	Reference
≥60 years	2.66	2.35–3.01	2.78	2.42–3.2	2.21	1.69–2.89
Sex
Female	Reference	Reference	–	–	–	–
Male	2.15	1.76–2.63	–	–	–	–
Smoking history
Never smokers	Reference	Reference	Reference	Reference	Reference	Reference
Former smokers	1.90	1.55–2.33	1.79	1.44–2.23	1.02	0.34–3.01
Current smokers	2.48	2.05–2.99	2.28	1.86–2.80	4.04	2.84–5.75
Income
Fourth quartile	Reference	Reference	Reference	Reference	Reference	Reference
Third quartile	1.27	0.99–1.62	1.14	0.87–1.49	2.29	1.16–4.53
Second quartile	1.56	1.26–1.93	1.48	1.18–1.86	2.19	1.15–4.15
First quartile	2.03	1.64–2.5	1.91	1.52–2.39	2.90	1.56–5.42

Note:

^aAdjusted for other factors (age, sex, smoking history, and income).