Table 2.
Mean and median duration of the first incident human papillomavirus (HPV) infection and prevalent HPV infection among women from São Paulo, Brazil, by HPV type, phylogenetic relationship, and oncogenic risk.
| Infection type, HPV category | Subject, no. | Duration, months (95% confidence interval) | |||
|---|---|---|---|---|---|
| Mean | Median | ||||
| Incidenta | |||||
| Type | |||||
| 6/11 | 53 | 9.5 (6.9–12.1) | 6.0 (5.7–6.9) | ||
| 16 | 162 | 11.9 (10.3–13.5) | 7.3 (6.3–10.7) | ||
| 18 | 47 | 10.9 (8.3–13.4) | 6.9 (6.0–12.0) | ||
| 26 | 9 | 9.1 (6.4–11.9) | 10.4 (3.6–12.2) | ||
| 31 | 50 | 11.5 (9.3–13.7) | 11.1 (5.9–12.2) | ||
| 32 | 4 | 6.8 (4.1–9.6) | 5.6 (4.1)b | ||
| 33 | 29 | 15.4 (9.6–21.2) | 11.8 (6.5–16.1) | ||
| 35 | 53 | 12.8 (8.6–17.1) | 6.2 (6.0–8.4) | ||
| 39 | 24 | 13.2 (9.7–16.8) | 6.5 (6.0–19.4) | ||
| 40 | 21 | 7.9 (6.1–9.8) | 6.0 (5.4–7.9) | ||
| 42 | 16 | 12.0 (4.1–19.9) | 6.0 (5.5–12.7) | ||
| 44 | 7 | 8.5 (5.9–11.1) | 6.0 (5.1–12.1) | ||
| 45 | 44 | 10.0 (8.3–11.8) | 6.4 (6.0–12.0) | ||
| 51 | 100 | 11.4 (9.4–13.3) | 6.3 (6.0–11.7) | ||
| 52 | 55 | 11.8 (9.4–14.2) | 11.7 (6.1–12.0) | ||
| 53 | 95 | 11.5 (9.7–13.3) | 10.0 (6.1–11.7) | ||
| 54 | 46 | 10.4 (7.4–13.4) | 6.0 (5.9–6.4) | ||
| 55 | 58 | 9.0 (7.2–10.8) | 6.1 (6.0–6.5) | ||
| 56 | 36 | 12.3 (9.3–15.2) | 11.3 (6.5–12.2) | ||
| 57 | 4 | 7.3 (4.4–10.2) | 6.1 (4.3)b | ||
| 58 | 61 | 14.5 (9.7–19.3) | 6.3 (6.0–10.8) | ||
| 59 | 34 | 9.5 (7.8–11.2) | 7.4 (6.0–11.8) | ||
| 61 | 27 | 10.4 (7.6–13.2) | 6.5 (5.8–11.5) | ||
| 62 | 33 | 9.4 (7.5–11.3) | 8.1 (6.0–11.8) | ||
| 66 | 27 | 7.7 (6.5–8.9) | 6.1 (6.0–8.0) | ||
| 67 | 5 | 5.6 (2.0–9.2) | 3.9 (3.1)b | ||
| 68 | 42 | 8.8 (7.0–10.5) | 6.3 (5.9–7.8) | ||
| 69 | 2 | 5.1 (3.8–6.3) | 4.1 (4.1)b | ||
| 70 | 18 | 8.1 (6.0–10.1) | 6.0 (4.7–10.5) | ||
| 71 | 16 | 10.6 (7.1–14.1) | 11.7 (4.1–13.4) | ||
| 72 | 6 | 7.4 (4.4–10.4) | 5.3 (3.7)b | ||
| 73 | 36 | 9.4 (7.0–11.8) | 6.2 (5.9–7.1) | ||
| 81 | 17 | 9.7 (6.4–13.0) | 6.8 (4.3–12.0) | ||
| 82 | 15 | 10.1 (5.0–15.3) | 6.2 (4.0–10.3) | ||
| 83 | 32 | 10.1 (7.7–12.5) | 6.3 (6.0–11.8) | ||
| 84 | 59 | 10.6 (8.6–12.5) | 7.1 (6.0–11.0) | ||
| 89 | 16 | 7.9 (5.8–10.1) | 6.0 (4.9–9.7) | ||
| Phylogenetic relationshipc | |||||
| Species 3 | 174 | 10.0 (9.0–11.1) | 6.3 (6.1–9.5) | ||
| Species 5 | 118 | 11.3 (9.5–13.2) | 6.3 (6.0–10.4) | ||
| Species 6 | 146 | 11.5 (9.8–13.2) | 9.0 (6.2–11.3) | ||
| Species 7 | 176 | 10.5 (9.3–11.8) | 6.4 (6.0–9.7) | ||
| Species 9 | 313 | 13.3 (11.6–14.9) | 6.7 (6.2–9.1) | ||
| Species 10 | 111 | 10.3 (8.2–12.5) | 6.1 (6.0–6.5) | ||
| Oncogenic riskd | |||||
| Any | 605 | 13.5 (12.4–14.7) | 7.1 (6.3–9.7) | ||
| High | |||||
| Any | 459 | 13.4 (12.1–14.8) | 6.5 (6.2–8.6) | ||
| Except type 16 | 393 | 13.2 (11.8–14.7) | 6.5 (6.2–8.4) | ||
| Except types 16 and 18 | 375 | 13.1 (11.6–14.6) | 6.5 (6.2–8.4) | ||
| Low | 396 | 10.5 (9.6–11.5) | 6.2 (6.0–6.7) | ||
| Prevalente | |||||
| Any | 342 | 18.6 (16.0–21.1) | 8.2 (8.0–9.2) | ||
| High oncogenic risk | 216 | 15.2 (12.5–18.0) | 8.0 (6.9–8.2) | ||
| Low oncogenic risk | 126 | 12.2 (9.4–15.1) | 6.2 (4.5–8.0) | ||
| HPV-16 | 54 | 15.5 (10.8–20.2) | 8.5 (6.9–11.9) | ||
Number of subjects does not include women with incident infection detected at the last visit.
Upper limit of the confidence interval was not determined.
Data are for alpha-papillomavirus species. HPV types 61, 62, 72, 81, 83, 84, and 89 are classified as alpha-papillomavirus species 3; HPV types 26, 51, 69, and 82 as species 5; HPV types 53, 56, and 66 as species 6; HPV types 18, 39, 45, 59, 68, and 70 as species 7; HPV types 16, 31, 33, 35, 52, 58, and 67 as species 9; and HPV types 6/11, 44, and 55 as species 10.
Data are pooled-probe positivity estimates (from onset of positivity to the end of positivity for any of the HPV types that comprised a given group). See the text for descriptions of high-risk and low-risk HPV types.
Does not include women with prevalent infection who did not return for subsequent visits.