TABLE 2.

Incidence of CIN by HIV status among a cohort of sex workers during a 3-year follow-up period, Nairobi, Kenya, 2009–2012

HIV status	n	py of observation	Women developing CIN	CIN incidence in new cases/100 py (95%CI)	P value*
Total	296	585	39	6.6 (5–9)	—
HIV-1-infected	59	113	9	7.9 (4–15)
Non-HIV-1-infected	237	472	30	6.3 (4–9)	0.54

^*χ² test.

CIN = cervical intra-epithelial neoplasia; HIV = human immunodeficiency virus; py = person-years; CI = confidence interval.