Table 2 Prevalence of HPV 6 and HPV 11 infection among WOLVES cohorts (2010–2015). Statistical comparisons are shown for cohorts 1 versus 3 and cohorts 2 versus 4
Cohorta | N | HPV 6 | Rate difference (95% CI) | HPV 11 | Rate difference (95% CI | OR | ||
|---|---|---|---|---|---|---|---|---|
Negative | Positive | Negative | Positive | |||||
1 | 659 | 645 (97.9%) | 14 (2.1%) | −0.0212 (− 0.039, − 0.01) P < 0.0001 | 658 (99.9%) | 1 (0.1%) | −0.0001 (− 0.0083, 0.0075) P = 1.0000 | 0.000 (not defined; 0.274) P < 0.0001 |
3 | 714 | 714 (100%) | 0 (0%) | 713 (99.9%) | 1 (0.1%) | |||
2 | 600 | 588 (98.0%) | 12 (2.0%) | −0.02 (−0.0383, − 0.0063) P = 0.0056 | 596 (99.3%) | 4 (0.7%) | −0.0067 (− 0.0197, 0.0052) P = 0.2753 | 0.000 (not defined; 0.580) p = 0.0048 |
4 | 368 | 368 (100%) | 0 (0%) | 368 (100%) | 0 (0%) | |||