Table 2.

Self-Reported Sex Behavior and Substance Use and Findings of Urine Drug Screen, by Study Visit

Characteristic	Visit 1	Visit 2	P a
Sex behavior
Recent receptive anal intercourse in past 7 d	15 (41)	17 (46)	.80
Receptive anal intercourse events in past 30 d, no., mean ± SD	2.8 ± 5.2	3.4 ± 4.9	.96
Any oral sex in past 90 d	34 (92)	24 (65)	.004
Oral sex with partner ejaculation in mouth in past 90 d			.17
Never	9 (27)	9 (38)
Rarely	12 (35)	9 (38)
Sometimes	4 (12)	4 (17)
Often	3 (9)	0
Most of the time	6 (18)	2 (8)
Oral sex with swallowing partner ejaculate in past 90 d			.62
Never	6 (24)	3 (20)
Rarely	6 (24)	9 (60)
Sometimes	2 (8)	0
Often	4 (16)	0
Most of the time	5 (20)	0
Always	2 (8)	3 (20)
Substance useb
Any use	31 (83)	24 (65)	.008
Drug used
Methamphetamines	24 (65)	21 (57)	.08
Ecstasy	8 (22)	2 (5)	.01
Cocaine	9 (24)	3 (8)	.16
Opiates	1 (3)	1 (3)	>.99
Party drugs	9 (24)	3 (8)	.03
Marijuana	18 (49)	11 (30)	.008
Prescription drugs	5 (14)	2 (5)	.08
Erectile dysfunction drugs	8 (22)	7 (19)	.74
Poppers	12 (32)	10 (27)	.32
Synthetic drugs (e.g. spice, bath salts)	1 (3)	3 (8)	.32
Urine drug screen
Any positive result	16 (43)	16 (43)	>.99
Drug detected
Methamphetamines	15 (41)	14 (38)	.74
Opiates	1 (3)	0	.32
Cocaine	3 (8)	2 (5)	.56
Ecstasy	0	1 (3)	.32
Marijuana	3 (8)	10 (27)	.008
Amphetamines	6 (16)	13 (35)	.04

Data are no. (%) of participants unless otherwise stated.

^aBinary variables were compared using by the McNemar test; continuous variables, using the Wilcoxon signed rank test; ordinal variables, using mixed ordinal logistic regression; and N×N (N > 2) nominal variables, using mixed multinomial logistic regression models.

^bIn the past 6 months.