TABLE 3.

Longitudinal Patterns of Anal Receptive and Insertive Behavior (Versatility) Over Multiple STD Clinic Visits, Public Health—Seattle and King County STD Clinic, 2001–2006

Visit	% Receptive	% Versatile	% Insertive	% Total Population	Median Time to Visit in Months (IQR)
1	12.3	63.4	24.2	100.0	—
1–2*	6.0	79.5	14.5	34.2	7 (4, 14)
1–3	2.6	86.7	10.7	16.1	14 (9, 22)
1–4	2.0	90.2	7.8	9.4	21 (14, 30)
1–5	1.5	90.8	7.7	5.4	25 (17, 33)
1–6	0.7	93.1	6.2	3.4	29 (22, 38)

^*Classification of men as receptive only or insertive only is cumulative over both visits (e.g. men classified as being receptive only denied having insertive anal sex at any of both visits).