Table 2.

Conditional Logistic Regression Model to Calculate Odds Ratios (OR) and 95% Confidence Intervals (95%CI) as Measures of Association of Covariates with Long-term HPV Persistence without Disease (LTP) versus Clearance.

	Model 1		Model 2
	OR	95% CI	OR	95% CI
Marital Status (Enrollment)
Single (ref)	1.0	––	1.0	––
Separated or Divorced	1.1	0.33–3.5	1.1	0.31–3.4
Widowed	1.0	0.26–4.0	0.99	0.25–3.9
Single	0.45	0.16–1.3	0.51	0.18–1.4
Lifetime Number of Sexual Parners (Enrollment)
1	1.0	––	1.0	––
2 or more	0.52	0.28–0.96	0.48	0.25–0.90
Number of Infections (Follow-Up)
0	1.0	––
1 or more	1.6	0.83–3.0
Number of Infections, 3 or more positive visits (Follow-Up)
0			1.0	––
1 or more			2.6	1.2–5.6

NOTE. Women who cleared to their infections were matched to women with LTP on the number of HPV genotypes detected at baseline and enrollment age +/−5 years. The variables were mutually adjusted for each other, and also adjusted for enrollment age, number of visits in follow-up, and number of new sexual partners reported during follow-up. Model 1 included a variable for any new HPV infection detected after baseline; Model 2 included a variable for any new HPV infection detected after baseline that tested positive at 3 or more visits. Ref = reference group.