Table 1.

Demographic characteristics

			Partner Similarity
	n (%)		κ
Race and Ethnicity			.229**
White/European	58 (58)
Black/African American	11 (11)
Latino	22 (22)
Other	9 (9)
Education			.064
Less than a college degree	70 (70)
Any college degree	30 (30)
Annual Income			.224
Less than $40,000	50 (50)
$40,000 or more	49 (49)
HIV status and PrEP adherence			.600**†
HIV positive	10 (10)
HIV negative 57% adherent or more	43 (43)
HIV negative < 57% adherent or not on PrEP	57 (57)
Sexual arrangement			NA
Monogamous	8 (8)
Monogamish	24 (24)
Open	58 (58)
Discrepant	10 (10)
	M (SD)	Median (IQR)	ICC
Age††	28.62 (6.11)	27 (25, 29)	−.262
Relationship duration (Months) ††	32.72 (29.30)	29 (6, 47.75)	.838**
Drug use (total days used in the past 30)
Marijuana use days††	8.47 (11.24)	2 (0, 18)	.367**
Other Illicit Drug use days††	2.25 (6.62)	0 (0, 1)	.719**
Condomless anal sex (total days sex occurred in the past 30)
With Casual Partners††	1.68 (2.58)	0 (0, 3)	.303**
With Main Partners††	4.65 (5.20)	3 (1, 6)	.762**

^*p< .015;

^**p ≤.01;

NA = Not Applicable

^†Serodiscordant couples were excluded from calculation.

^††ICC’s for skewed continuous and count variables were calculated on natural-log transformed values to correct for deviations from normality