Table 3.

Incidence rate of new HPV infections (per 1,000 women-months) and RRs for the association between new sexual partners and new infections among women ages 40 years or older who reported two or more lifetime sexual partners at enrollment (N = 251)

HPV groupCategoriesIncidence rate (95% CI)Crude RR (95% CI)Adjusted RR (95% CI)*
All types9.8 (8.1–11.7)2.5 (1.3–4.8)2.8 (1.4–5.3)
Species31.9 (1.3–2.7)5.2 (2.2–12.0)6.1 (2.6–14.4)
51.0 (0.7–1.6)2.1 (0.5–9.0)2.1 (0.5–9.6)
61.5 (1.1–2.2)3.9 (1.5–10.4)6.1 (2.2–16.7)
71.6 (1.1–2.3)3.4 (1.3–9.1)4.4 (1.2–15.5)
94.0 (3.1–5.1)2.6 (1.2–5.8)3.4 (1.5–7.7)
100.9 (0.6–1.5)4.5 (1.5–13.9)5.1 (1.6–16.1)
Group11.4 (1.0–2.1)4.2 (1.6–11.1)3.5 (1.3–9.7)
26.9 (5.6–8.4)1.7 (0.8–3.6)1.7 (0.8–3.6)
32.4 (1.8–3.3)4.9 (2.3–10.7)6.2 (2.7–14.0)

NOTE: RRs and their respective 95% CIs obtained via Cox regression modeling with time-dependent covariates. Referent group: women who reported not having a new sexual partner. Ludwig-McGill cohort, Brazilian women (1993–2004).

  • *Adjusted for empirical confounders. See text for details.

  • Crude and adjusted estimates equivalent because no empirical confounders were identified.