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Table 2 HPV incidence and clearance between March 2003 and December 2006, Kampala, Uganda

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

  Incidence Clearance
HPV type Incident
casesa
Person
years
Incidence rate
per 100 p. yrs
Number
cleared
Person
years
Clearance rate
per 100 p. yrs
High-risk types       
16 16 487 3.3 45 63 71.4
18 10 491 2.0 47 59 79.7
31 20 727 2.8 25 29 86.2
33 13 407 3.2 43 43 100.0
35 19 527 3.6 22 52 42.3
39 8 540 1.5 17 29 58.6
45 9 696 1.3 11 20 55.0
51 25 602 4.2 54 90 60.0
52 23 674 3.4 45 84 53.6
56 24 697 3.4 40 50 80.0
58 14 558 2.5 10 11 90.9
59 8 508 1.6 10 19 52.6
68 10 749 1.3 5 1 100.0
68-73 15 529 2.8 25 39 64.1
39-68-73 3 399 0.8 9 11 81.8
Low-risk types       
6 22 651 3.4 69 107 64.5
11 8 440 1.9 59 116 50.9
34 0 0 0.0 0 0 0.0
40 4 288 1.1 18 26 46.2
42 0 0 0.0 2 1 100.0
43 3 225 1.3 18 23 78.3
44 8 713 1.1 5 6 83.3
53 5 289 1.7 13 18 72.2
54 14 735 1.9 14 15 93.3
66 15 649 2.4 19 38 50.0
70 7 600 1.2 11 9 100.0
74 5 373 1.3 2 1 100.0
HPV Xb other types 50 701 7.1 39 55 70.9
HPV X c 33 550 6.0 15 18 83.3
Number of women with:       
- Any HPV 69 226 30.5 143 459 31.2
- High-risk 85 407 20.9 145 344 42.2
- Low-risk 49 461 10.6 138 292 47.3
- Single infections 115 532 21.6 104 218 47.7
- Multiple infections 42 508 8.3 133 241 55.2
- HPV 16-related d 59 547 10.8 106 208 51.0
- HPV 18-related e 36 640 5.6 76 116 65.5
  1. Note; The figures do not add up because of missing figures
  2. Abbreviations: P. yrs, person-years; HR, high-risk; LR, low-risk
  3. a Crude numbers
  4. b HPV types detected at a 2nd round of testing: HPV 26, 30, 55, 61, 62, 64, 67, 69, 71, 82, 83, 84, 87, 89, 90, and other unknown types
  5. cHPV X, i.e. type unknown
  6. d Includes HPV 16, 31, 33, 35, 52 and 58
  7. e Includes HPV 18, 39, 45, 59, 68