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Table 1 Distribution of risk factors and HPV prevalence by clinic site

From: HPV infection among rural American Indian women and urban white women in South Dakota: an HPV prevalence study

  American Indian White  
  (n= 235) (n= 246)  
Risk factors % % Χ 2 p-value
Age, years    
   18 - 24 26 13 0.01
   25 - 34 31 33  
   35 - 44 25 29  
   45 - 54 12 18  
   55 - 65 6 8  
Sexual partners    
   1 7 23 < 0.001
   2 - 3 24 29  
   4 - 5 12 12  
   6 - 9 33 24  
   ≥ 10 24 12  
HPV prevalence a % (95% CI) % (95% CI) Χ 2 p-value
Infection status    
   Not infected 58 (51-65) 77 (71-82) < 0.001
   Infected by single HPV type 23 (18-30) 16 (12-21)  
   Infected by multiple HPV types 19 (15-24) 7 (4-11)  
Alpha 7 oncogenic infectionb 12 (9-16) 8 (5-13) 0.03
Alpha 9 oncogenic infectionc 18 (13-24) 9 (6-14) < 0.001
Other oncogenic infectiond 8 (5-11) 2 (1-4) 0.001
Any oncogenic infection 30 (25-36) 16 (11-21) < 0.001
  1. a Prevalence estimates are standardized by age and number of sexual partners; b HPV types 16, 31, 33, 35, 52, 58, and 67; c HPV types 18, 39, 45, 59, 68, and 70; d HPV types 51, 56, 66, 73, 82.