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Table 3 Quadratic Model for Log Odds of hrHPV and hrHPV by Type

From: Population-based prevalence of cervical infection with human papillomavirus genotypes 16 and 18 and other high risk types in Tlaxcala, Mexico

  Coef. on age2 (SD) Coef. on age (SD) Model p value Two-tailed P values for Differences in Coefficient on Age2
Any hrHPV 0.00178 (0.000299) −0.1702 (0.0204) <0.001  
HPV16/18a 0.00228 (0.000520) −0.2302 (0.0458) <0.001 0.206b
Non-16/18 hrHPV only 0.00155 (0.000250) −0.1449 (0.0223) <0.001  
HPV16/18 only 0.00147 (0.000681) −0.1628 (0.0594) 0.031 1.098c
HPV16/18 and other hrHPV 0.00342 (0.000805) −0.3246 (0.0717) <0.001  
  1. Abbreviation: SD standard deviation
  2. aHPV16/18 refers to women who are positive for HPV16 and/or 18 regardless of other hrHPV types for which they may or may not test positive; bcomparison non-16/18 hrHPV only vs HPV16/18; c comparison non-16/18 hrHPV only vs HPV16/18 only