Table 4.

Clearance rates for individual HPV types

HPV typeClearance rate per 1,000 WMR95% CI
All cases*
    HPV16 (n = 196)16.52 (57/3,450)12.3-20.8
    HPV18/45 (n = 108)16.00 (28/1,749)10.1-21.9
    HPV31 (n = 85)15.54 (20/1,287)8.8-22.3
    HPV33/52/58 (n = 98)21.01 (29/1,380)13.3-28.6
    HPV39 (n = 37)10.83 (7/646)2.8-18.8
P = 0.704
Single infections
    HPV16 (n = 134)15.57 (39/2,504)10.7-20.4
    HPV18/45 (n = 51)16.77 (15/894)8.3-25.2
    HPV31 (n = 39)16.54 (11/665)6.8-26.2
    HPV33/52/58 (n = 50)23.89 (20/837)13.5-34.2
    HPV39 (n = 15)6.96 (2/278)2.6-16.5
P = 0.398
MI (n = 104)16.16 (25/1,547)9.8-22.4
Total16.37 (116/7,085)13.4-19.3
  • Abbreviations: WMR, woman months at risk; MI, multiple infections.

  • * HPV type as single or as part of multiple infection.

  • Fisher's exact test.

  • Mean clearance rate: 116 events during 7,085 WMR (all baseline HPV-positive women).