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Table 1 Cumulative positivity of HPV infections among 380 women up to 3 follow-up visits between 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

  Prevalence at entry (%) Cumulative positivity (%) Positive once (%) Positive ≥ 2 visits (%)
Infections with high-risk HPV types
16 42 (11.1) 58 (15.3) 49 (12.9) 9 (2.4)
18 47 (12.4) 56 (14.7) 50 (13.2) 6 (1.6)
31 24 (6.3) 43 (11.3) 36 (9.5) 7 (1.8)
33 41 (10.8) 52 (13.7) 46 (12.1) 6 (1.6)
35 22 (5.8) 40 (10.5) 33 (8.7) 7 (1.8)
39 18 (4.7) 26 (6.8) 21 (5.5) 5 (1.3)
45 11 (2.9) 20 (5.3) 16 (4.2) 4 (1.1)
51 54 (14.2) 76 (20.0) 59 (15.5) 17 (4.5)
52 49 (12.9) 71 (18.7) 52 (14.2) 17 (4.5)
56 32 (8.4) 54 (14.2) 47 12.4) 7 (1.8)
58 8 (2.1) 22 (5.8) 19 (5.0) 3 (0.8)
59 8 (2.1) 15 (3.9) 12 (3.2) 3 (0.8)
68-73 20 (5.3) 35 (9.2) 30 (7.9) 5 (1.3)
39-68-73 8 (2.1) 11 (2.9) 11 (2.9) 0 (0.0)
Infections with low-risk HPV types
6 74 (19.5) 94 (24.7) 82 (21.6) 12 (3.2)
11 55 (14.5) 62 (16.3) 59 (15.5) 3 (0.8)
34 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0)
40 17 (4.5) 20 (5.3) 17 (4.5) 3 (0.8)
42 2 (0.5) 2 (0.5) 2 (0.5) 0 (0.0)
43 19 (5.0) 22 (5.8) 19 (5.0) 3 (0.8)
44 6 (1.6) 14 (3.7) 8 (2.1) 6 (1.6)
53 12 (3.2) 17 (4.5) 15 (3.9) 2 (0.5)
54 9 (2.4) 21 (5.5) 15 (3.9) 6 (1.6)
66 20 (5.3) 35 (9.2) 27 (7.1) 8 (2.1)
70 11 (2.9) 18 (4.7) 13 (3.4) 5 (1.3)
74 2 (0.5) 7 (1.8) 4 (1.1) 3 (0.8)
HPV Xa 26 (6.8) 75 (19.7) 66 (17.4) 9 (2.4)
HPV other X b 8 (2.1) 42 (11.1) 38 (10.0) 4 (1.1)
Number of women with:
- Any HPV types 286 (75.3) 329 (86.6) 122 (32.1) 207 (54.5)
- High-risk HPV types 197 (51.8) 259 (68.2) 139 (36.6) 120 (31.6)
- Low-risk HPV types 167 (43.9) 209 (55.0) 144 (37.9) 65 (17.1)
- Single infections 102 (26.8) 210 (55.3) 142 (37.4) 68 (17.9)
- Multiple infections 152 (40.0) 181 (47.6) 124 (32.6) 57 (15.0)
-HPV 16--related c 127 (33.4) 178 (46.8) 113 (29.7) 65 (17.1)
-HPV 18--related d 77 (20.3) 107 (28.6) 82 (21.6) 25 (6.6)
  1. a HPV X includes types 26, 30, 55, 61, 62, 64, 67, 69, 71, 82, 83, 84, 87, 89, 90 and other unknown types
  2. bHPV-other X, i.e. type unknown
  3. c Includes HPV 16, 31, 33, 35, 52 and 58;
  4. d Includes HPV 18, 39, 45, 59, 68