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Table 3 Fraction of cytology abnormalities in the population attributable to HPV 16-18 and HPV 6-11 alone and in co-infection with high and low risk types (7).

From: Distribution of high and low risk HPV types by cytological status: a population based study from Italy

ALL PAP TEST RESULTS   
  Negative ASC-US L-SIL+   
  3151 117 90   
HPV INFECTION N % N % N % PAR ASC-US+ (95% CI) PAR L-SIL+ (95% CI)
HPV negative 2844 90.3 77 65.8 25 27.8   
16-18 alone 43 1.4 8 6.8 17 18.9 11.2 (6.6-15.7) 18.4 (9.8-26.1)
16-18 & other HR+ 28 0.9 1 0.9 7 7.8 3.3 (0.5-6.0) 7.4 (1.7-12.8)
16-18 & LR+ 3 0.1 0 0.0 2 2.2 0.9 (0.0-2.2) 2.2 (0.0-5.2)
6-11 alone 17 0.5 1 0.9 0 0.0 0.2 (0.0-1.1)  
6-11 & HR+ (excluded 16-18) 2 0.1 1 0.9 2 2.2 1.4 (0.2-3.0) 2.2 (0.0-5.2)
6-11 & other LR+ 1 0.0 1 0.9 0 0.0 0.5 (0.5-1.4)  
other HR+ only 142 4.5 22 18.8 32 35.6 23.4 (16.5-29.6) 33.9 (22.9-43.4)
other LR+ only 63 2.0 5 4.3 3 3.3 2.7 (0.0-5.5) 2.7 (0.0-6.4)
other HR+ & LR+ 8 0.3 1 0.9 2 2.2 1.3 (0.0-2.9) 2.1 (0.0-5.1)
< = 35 years         
  PAP TEST RESULTS   
  Negative ASC-US L-SIL+   
  771 42 41   
HPV INFECTION N % N % N % PAR ASC-US+ (95% CI) PAR L-SIL+ (95% CI)
HPV negative 649 84.2 22 52.4 9 22.0   
16-18 alone 19 2.5 4 9.5 8 19.5 13.4 (5.3-20.8) 18.8 (5.6-30.2)
16-18 & other HR+ 17 2.2 1 2.4 4 9.8 5.1 (0.0-10.2) 9.1 (0.0-17.9)
16-18 & LR+ 1 0.1 0 0.0 1 2.4 1.2 (0.0-3.5) 2.4 (0.0-7.0)
6-11 alone 8 1.0 1 2.4 0 0.0 0.7 (0.0-3.1)  
6-11 & HR+(exclued 16-18) 2 0.3 0 0.0 2 4.9 2.3 (0.0-5.6) 4.8 (0.0-11.2)
6-11 & other LR+ 1 0.1 1 2.4 0 0.0 1.2 (0.0-3.5)  
other HR+ only 52 6.7 9 21.4 15 36.6 26.0 (14.7-35.8) 34.8 (17.5-48.4)
other LR+ only 19 2.5 3 7.1 0 0.0 2.5 (0.0-6.7)  
other HR+ & LR+ 3 0.4 1 2.4 2 4.9 3.5 (0.0-7.4) 4.8 (0.0-11.1)
  1. All PAR adjusted by age.