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Table 3 HPV incident and clearance cases and rates per 100 person-years and RR according to different women's characteristics

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

Baseline
Characteristics
Incidence Clearance
  Distribution
women (%)
Person
years
Rate
per 100 p. yrs
RR (95% CI)a Distribution
women (%)
Person
years
Rate
per 100 p. yrs
RR (95% CI)a
Age (yrs) at study entry
21 -- 24 78 (50.3) 115 25.3 1 (ref.) 145 (47.4) 72 9.8 1 (ref.)
18 -- 20 62 (40.0) 92 32.6 1.2 (0.7 -- 2.0) 128 (41.8) 64 7.8 0.7 (0.5-1.0)
12 -- 17 15 (9.7) 19 53.3 2.2 (1.0 -- 4.5) 33 (10.8) 16 0 0.9 (0.5-1.5)
Lifetime number of sexual partners
1 47 (30.3) 66 30.1 1 (ref.) 73 (23.9) 36 8.3 1 (ref.)
2 45 (29.0) 78 26.8 0.8 (0.4 -- 1.5) 91 (29.7) 45 11.1 0.9 (0.6-1.5)
3 36 (23.2) 46 36.8 1.5 (0.8 -- 2.9) 73 (23.9) 36 2.7 0.9 (0.5-1.4)
4 or more 27 (17.4) 34 32 1.1 (0.5 -- 2.3) 69 (22.5) 34 8.7 1.0 (0.6-1.6)
HIV status
Negative 148 (95.5) 212 29.7 1 (ref.) 272 (88.9) 135 8.9 1 (ref.)
Positive 4 (2.6) 6 65 2.8 (0.9 -- 8.3) 20 (6.5) 10 0 0.3 (0.1-0.8)
Unknown 3 (1.9) 7 27.2 - 14 (4.6) 7 0 -
Multiplicity of HPV types b
No infection -- -- -- -- 28 (9.2) 14 14.5 1 (ref.)
Single -- -- -- -- 108 (35.3) 54 5.6 0.5 (0.3-1.0)
2 or more types -- -- -- -- 170 (55.6) 841 8.3 0.6 (0.4-1.2)
  1. Note 1: The figures do not add up because of missing values
  2. Note 2: The denominator is person-years
  3. Abbreviations: CI, Confidence Intervals; p. yrs, person-years
  4. a adjusted for age, number of sexual partners and HIV infection
  5. b 2 or more types compared to 1 infection: for clearance 1.3 (0.9-1.8)