. Author manuscript; available in PMC: 2008 May 2.

Published in final edited form as: Clin Infect Dis. 2007 Mar 9;44(8):1115–1122. doi: 10.1086/512816

Table 4.

Transmission model parameters: number of acts of unprotected insertive anal intercourse (UIAI) per month.

Variable	UIAI, no. of acts per person per month
CD4⁺ cell count, cells/mm³
0–50	0.81
51–100	1.45
101–200	0.55
201–300	2.69
301–500	1.11
500	1.25
Primary infection	1.87

NOTE. The number of acts of UIAI was estimated from the MSM population of the Boston Partners Study [22, 29].