Table 3.

Odds Ratios for Sustained Quitting During the Study Period

Characteristic	Variable for Odds Ratio	Adjusted Odds Ratio *	95% Confidence Interval *
Spirometry	Performed	0.6	0.2, 1.4
Abnormal spirometry	Yes	0.6	0.1, 2.7
Clinic site	Gabriel Park	0.7	0.3, 1.7
Successful 24-hr quit prior to study period	Yes	4.3	1.5, 15.7
NRT used during study period †	Yes	6.7	2.3, 19.6
<10 Cigarettes daily	Yes	0.17	0.06, 0.5
First daily cigarette within 30 min	Yes	0.4	0.16, 1.01
Education	Beyond high school	Reference
	11th Grade or less	0.1	0.09, 0.6
Insurance status	Third-party	Reference
	Federal ‡	0.15	0.04, 0.4
Motivational stage	Preparation	1.9	0.7, 5.4

^*Based on logistic regression analysis adjusted for age and gender.

^†NRT indicates nicotine replacement therapy.

^‡Federal insurance includes Medicare, Medicaid, or Oregon Health Plan.