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Table 1 Baseline characteristics associated with participation in follow-up study and with high-risk HPV infection outcome

From: High-risk HPV infection after five years in a population-based cohort of Chilean women

Characteristic at enrollment in 2001 Category Participation in follow-up study HR-HPV infection outcome (Univariate)
   Enrolled 2001 Followed 2006 Multivariate Type-specific Persistence Incidence
   (n = 969)* (n = 576)* P value OR (95% CI)** OR (95% CI)***
Age < 30 years old 23.4 19.8 0.813 Inf 2.11 (1.17-3.80)
Marital Status Single/separated/widowed 24.4 20.7 0.169 0.18 (0.02-1.61) 0.40 (0.17-0.97)
Schooling ≤ 8 years 58.5 61.6 0.011 5.00 (1.21-20.69) 1.24 (0.70-2.19)
N° of Children ≥ 3 55.8 59.3 0.077 1.44 (0.43-4.85) 0.74 (0.43-1.28)
Age First Sexual Intercourse ≤16 years old 36.0 35.8 0.681 0.68 (0.21-2.17) 1.36 (0.79-2.36)
Lifetime Sexual Partners > 1 39.6 36.0 0.701 0.74 (0.23-2.34) 0.78 (0.43-1.41)
Current High-risk Sexual Partnera Yes 31.0 29.8 0.311 1.93 (0.49-7.61) 0.60 (0.27-1.35)
Condom Use Never 84.0 85.5 0.045 0.18 (0.02-2.16) 0.90 (0.41-2.01)
History of STDb Yes 3.8 4.2 0.222 1.88 (0.11-32.01) 0.36 (0.05-2.75)
Current Hormonal Contraception Yes 12.0 13.3 0.733 0.39 (0.10-1.54) 1.33 (0.75-2.38)
Current Smoker Yes 40.5 38.5 0.427 0.47 (0.14-1.55) 0.74 (0.42-1.31)
Previous Pap Test No 21.2 17.0 0.7 14.35 (0.78-262.64) 1.97 (1.06-3.67)
Abnormal Baseline Papc Yes 3.8 3.7 0.904 0.32 (0.06-1.68) 0.92 (0.21-4.05)
Baseline HPV Status HR-HPV positive 9.6 8.9 0.999 -- 3.56 (1.77-7.16)
  1. * values presented as percentages.
  2. ** referent: women who in 2006 had cleared a HR-HPV genotype present in 2001.
  3. *** referent: women who did not acquire a new HR-HPV genotype in 2006.
  4. a partner had sex with other women during their relationship or ever had sex with prostitute.
  5. b sexually transmitted disease.
  6. c ASCUS or worse.
  7. Bold: statistically significant at P value < 0.05.
  8. Inf: infinite odds ratio since the characteristic was present in 0% of cases; thus the CI is incalculable.