Table 1.

Demographics of people who inject opioids in Los Angeles and San Francisco, 2011-2013 (N=653)

Demographics		n	Cannabis Yes (n=321)	Cannabis No (n=332)
City	Los Angeles	365	36%	64%
	San Francisco	288	66%	34%
Sex	Male	468	54%	46%
	Female	184	38%	62%
Race	Black	208	48%	52%
	White	195	59%	41%
	Hispanic	183	34%	66%
	Other race/ethnicity	63	65%	35%
Age	18 to 29 years	62	69%	31%
	30 to 39 years	66	70%	30%
	40 to 49 years	175	49%	51%
	50 years or older	350	42%	58%
Sexual orientation	Heterosexual	582	48%	52%
	Gay/lesbian/bisexual	71	61%	39%
Considers self homeless	Yes	406	51%	49%
	No	247	46%	54%
HIV antibody status self-reported (n=619)	Negative	586	50%	50%
	Positive	33	55%	45%
Drug use		n	%
Age at first injection	9 to 17 years	248	46%	54%
	18 to 29 years	300	55%	45%
	30 years or older	107	39%	61%
Number days used alcohol (n=390)	No alcohol use	162	41%	59%
	1 to 4 days	90	52%	48%
	5 to 29 days	68	69%	31%
	Every day	70	59%	41%
Crack cocaine past 30 days		310	58%	42%
Powder cocaine past 30 days		106	59%	41%
Methamphetamine past 30 days		220	65%	35%
Heroin past 30 days		619	48%	52%
Speedball (heroin plus cocaine) past 30 days		131	56%	46%
Goofball (heroin plus methamphetamine) past 30 days		95	67%	33%
Opioid pills past 30 days		245	63%	37%
Illicit methadone		162	49%	51%
Any substance abuse treatment past 30 days		261	50%	50%