Table 4.

Odds ratios for associations between persistent HPV infection at visit (t) and viral load at visit (t-1) estimated via GEE models

			OR and 95% CI
HPV type	Viral load tertile	No. of Events/No. Eligible cases	Crude	Adjusted*
16	First	29/54	1.0	1.0
	Second	42/54	2.97 (1.25-7.03)	2.88 (1.22-6.87)
	Third	40/54	2.47 (1.15-5.32)	2.45 (1.14-5.26)
18	First	7/21	1.0	1.0
	Second	13/21	5.24 (0.65-42.52)	4.33 (0.80-23.61)
	Third	17/21	10.23 (1.39-75.41)	11.33 (1.90-67.59)
31	First	14/18	1.0	1.0
	Second	13/18	0.73 (0.13-4.00)	0.77 (0.15-3.80)
	Third	8/18	0.22 (0.04-1.28)	0.24 (0.05-1.28)
45	First	5/9	1.0	1.0
	Second	4/10	0.66 (0.05-7.99)	0.46 (0.04-5.02)
	Third	5/8	1.97 (0.12-32.16)	0.92 (0.06-14.02)

Events are considered as HPV infections with the stated type at visits at times t = 2, 3, 4, and 5 as a function of viral load determined at the preceding visit.

*Adjusted for age and number of lifetime sexual partners