Table 3. Core drug use network (n=565) features, by select characteristics of young persons who inject drugs (ego) (n=148).

Ego characteristic		N	Mean core network size	Mean % of network with homologous trait	% of network sharing needles
All		148	3.8
Age	18-24 yrs old	49	3.7	42%	19%
	25-30 yrs old	99	3.9	37%	14%
Gender	Male	93	4.0	70%	13%
	Female	54	3.5	36%	21%
	Transgender	1	6.0	0%	17%
Race/ethnicity	NH-white	105	3.8	80%	17%
	Hispanic (all)	24	4.2	35%	9%
	NH-black/mixed/other	19	3.5	12%	17%
Location(s) of residence(s)	Urban only	51	3.5	70%	10%
	Suburban only	57	3.6	78%	15% §
	Both (crossover)	40	4.5	11%	23%
Homeless a	No	71	3.3 †	95%	16%
	Yes	75	4.4	18%	16%
HCV status	HCV positive	14	5.0	23%	32%
	HCV negative	94	3.6	66%	9% **
	Unknown	40	3.8	48%	25%

^†IRR = 1.35, z = 2.56, p = .010.

^§Kruskal-Wallis chi-squared = 8.20, 2df, p = .017.

^**Kruskal-Wallis chi-squared = 12.80, 2 df, p = .002.

^a2 observations missing.