Table 4.

Summary of logistic regression results

			Analytic Sample (N = 294)
Item	Response	Item-Response Weights	Item OR (95% CI)	Response Options ORs	OR, CIs
During the past 4 weeks, how much of the time did you feel short of breath?	None of the time	0	1.07	—	—
	A little of the time	0	(0.75, 1.53)	1.27	0.38, 4.28
	Some of the time	1		0.88	0.26, 2.98
	Most of the time	2		1.13	0.30, 4.24
	All of the time	2		0.40	0.06, 2.63
Do you ever cough up any “stuff,” such as mucus or phlegm?	No, never	0	0.91	—	—
	Occas. colds	0	(0.72, 1.15)	1.49	0.49, 4.56
	Few days a month	1		1.84	0.54, 6.22
	Most days a week	1		1.48	0.43, 5.04
	Yes, every day	2		1.85	0.57, 6.05
Please select the answer that best describes you in the past 12 months. I do less than I used to because of my breathing problems.	Strongly disagree	0	1.64*	—	—
	Disagree	0	(1.25, 2.16)	0.77	0.23, 2.58
	Unsure	0		0.89	0.22. 3.54
	Agree	1		2.28	0.80, 6.54
	Strongly agree	2		6.78†	1.96, 23.47
Have you smoked at least 100 cigarettes in your ENTIRE LIFE?	No	0	5.80*	—	—
	Yes	2	(2.81, 11.96)	5.80*	2.68, 12.58
How old are you?	Aged 35 to 49 y	0	2.68*	—	—
	Aged 50 to 59 y	1	(1.92, 3.74)	2.85	0.78, 10.41
	Aged 60 to 69 y	2		6.80†	1.98, 23.35
	Aged 70+ y	2		23.80*	6.84, 82.83
Overall model fit:			LR test: 122.13, 16 df, p < 0.0001

OR: odds ratio; CI: confidence interval; Occas.: Occasionally; LR: likelihood ratio; df: degrees of freedom.

^*p < 0.001

^†p < 0.01.