Infectious Agents and Cancer

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 cases^a	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 X^b 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

Note; The figures do not add up because of missing figures
Abbreviations: P. yrs, person-years; HR, high-risk; LR, low-risk
^a Crude numbers
^b HPV types detected at a 2^nd round of testing: HPV 26, 30, 55, 61, 62, 64, 67, 69, 71, 82, 83, 84, 87, 89, 90, and other unknown types
^cHPV X, i.e. type unknown
^d Includes HPV 16, 31, 33, 35, 52 and 58
^e Includes HPV 18, 39, 45, 59, 68

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