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Table 4 LSIL incidence among women with normal cytology followed upbetween March 2003 and December 2006 in Kampala, Uganda

From: Type-specific incidence, clearance and predictors of cervical human papillomavirus infections (HPV) among young women: a prospective study in Uganda

HPV type No. of
women
Person
years
Incident
LSIL
Incidence
rate per
100 p. yrs
Crude RR (95% CI)a
Infected/non-infected
p-value
HPV 16       
Non-infected 142 114 21 18.4 1  
Infected 8 9 1 11.1 0.5 (0.1 -- 3.9) 0.52
HPV 18       
Non-infected 147 120 21 17.5 1  
Infected 3 3 1 33.3 2.2 (0.3 -- 16.2) 0.45
High-risk HPV types       
Non-infected 104 81 12 14.8 1  
Infected 46 43 10 23.3 1.4 (0.6 -- 3.4) 0.39
Low-risk HPV types       
Non-infected 122 99 20 20.2 1  
Infected 28 24 2 8.3 0.4 (0.1 -- 1.8) 0.25
HPV 16-related b       
Non-infected 124 98 18 18.4 1  
Infected 26 25 4 16 0.8 (0.3 -- 2.3) 0.64
HPV 18-related c       
Non-infected 142 117 19 16.2 1  
Infected 8 64 3 50 3.5 (1.0 -- 11.8) 0.05
Any HPV type       
Non-infected 76 58 10 17.2 1  
Infected 74 65 12 18.5 1.0 (0.4 -- 2.5) 0.91
  1. Abbreviations: CI, confidence intervals; p. yrs, person--years
  2. aFurther adjusted for age, HIV, lifetime number of sexual partners did not change the results
  3. bIncludes HPV 16, 31, 33, 35, 52 and 58
  4. cIncludes HPV 18, 39, 45, 59 and 68