Table 4. No. (%) of cases and controls positive for HPV 16 and HPV 18 along with results from logistic regression analysis.
| Cases HPV+ | Controls HPV+ |
ORa (95% CI)
|
||
|---|---|---|---|---|
| Age group at baseline | N (%) | N (%) | Model 1b | Model 2c |
| HPV 16 | ||||
| Under 20 | 9 (9.3) | 5 (5.0) | 2.25 (0.71–7.13) | 2.10 (0.61–7.30) |
| 20–39 | 39 (14.6) | 10 (3.8) | 4.62 (2.24–9.51) | 4.15 (1.99–8.64) |
| 40 or over | 22 (11.0) | 3 (1.4) | 8.95 (2.63–30.4) | 9.08 (2.65–31.1) |
| All ages | 70 (12.4) | 18 (3.1) | 4.48 (2.61–7.55) | 4.18 (2.44–7.18) |
| HPV 18 | ||||
| Under 20 | 3 (3.1) | 3 (3.0) | 1.12 (0.22–5.78) | 0.85 (0.15–4.95) |
| 20–39 | 12 (4.6) | 6 (2.3) | 2.02 (0.74–5.49) | 2.15 (0.72–6.44) |
| 40 or over | 12 (6.0) | 8 (3.6) | 1.69 (0.68–4.23) | 1.30 (0.49–3.48) |
| All ages | 27 (4.8) | 17 (2.9) | 1.72 (0.93–3.20) | 1.48 (0.77–2.86) |
HPV=human papillomavirus; OR=odds ratio; CI=confidence interval.
a
For cases vs controls (logistic regression).
b
Adjusted for age in years.
c
Adjusted for age in years, infection with other specific HPV type (16 or 18) and infection with unknown HPV type (positive using GP5+/6+ primers but negative for HPV 16/18).