Table 1.

Cross-tabulation of cytologic and histologic anal SIL results from baseline visits in 617 men enrolled in the Study of the Prevention of Anal Cancer

Histology
CytologyNo biopsyNegativeLSILHSIL-AIN2HSIL-AIN3MissingTotalPrevalence (95% CI)
Unsatisfactory2139050294.7% (3.3–6.7)
Negative7296401418124139.0% (35.3–43.0)
ASCUS171740920010316.7% (14.0–19.9)
LSIL3326690477.6% (5.8–10.0)
ASC-H1692193308814.3% (11.7–17.3)
HSIL-AIN2415380213.4% (2.2–5.2)
HSIL-AIN3391485408814.3 (11.7–17.3)
Total117148155491471617
Prevalence (95% CI)19.0% (16.1–22.3)24.0% (20.8–27.6)25.2% (21.9–28.8)8.0% (6.1–10.4)23.9 (20.7–27.4)
  • Abbreviation: AIN, anal intraepithelial neoplasia.