Table III.

Model-Predicted Probability of Clinical Trial Screening^a

	Predicted Probability	95% Confidence Interval
Borough of Residence
Manhattan	.48	[.35; .61]
Bronx	.58	[.50; .66]
Brooklyn	.63	[.55; .70]
Queens	.56	[.43; .69]
Sexual Orientation
Heterosexual	.59	[.54; .64]
Bisexual	.58	[.40; .76]
Gay or Lesbian	.48	[.39; .57]
BSI Global Severity Index
0.13 (lower quartile)	.52	[.43; .61]
0.68 (upper quartile)	.60	[.55; .66]
Years Since HIV Diagnosis
Eleven (lower quartile)	.53	[.46; .59]
Nineteen (upper quartile)	.63	[.56; .70]
General Health Self Rating
Poor	.42	[.18; .66]
Fair	.54	[.43; .64]
Good	.57	[.49; .65]
Very Good	.52	[.41; .63]
Excellent	.67	[.56; .78]
Injection Drug Use
Never	.59	[.54; .65]
Past	.51	[.42; .60]
Current	.27	[.06; .48]
Alcohol Frequency
Never	.54	[.46; .61]
About Once a Week	.61	[.55; .68]
Drug Frequency
Never	.61	[.53; .69]
About Once a Week	.54	[.47; .60]
Antiretroviral Medication
Current	.55	[.50; .61]
Never	.63	[.50; .75]
Past	.46	[.37; .55]
Past Screening for ACT
No	.52	[.48; .56]
Yes	.71	[.58; .85]
Number of Peers Recruited/Educated
None	.50	[.39; .61]
Three	.71	[.62; .79]
Attended All Intervention Sessions
No	.24	[.13; .35]
Yes	.61	[.55; .66]

^aThe margins and prvalue functions (Long & Freese, 2006) in version 12 of Stata were used to calculate point and interval estimates of predicted probabilities. When calculating predicted probabilities for each variable, all other variables in the model were held constant at mean values. Only variables with at least marginally significant (p < .10) overall effects or at least one marginally significant pairwise contrast are included.