Table 2.

Prevalence of drug use and risky injection behaviors among past-year injection drug users: data from the 2005–2008 National Survey on Drug Use and Health

Characteristic	N	wt% (95% CI)
Type of drug injected in past year^a
Heroin	244	52.90 (44.59, 61.05)
Cocaine	190	38.55 (30.79, 46.94)
Methamphetamine	187	37.67 (30.26, 45.72)
Other stimulants	101	21.26 (15.24, 28.84)
Number of different drug types injected in past year
1	275	60.33 (53.76, 66.54)
2+	128	39.67 (33.46, 46.24)
Recent injection drug use
Within the past 30 days	192	42.00 (33.87, 50.59)
More than 30 days ago but within the past 12 months	313	67.79 (59.76, 74.90)
Other drug use in past year
Crack cocaine	177	38.24 (30.68, 46.42)
Risky injection behavior^b
Reusing needles	231	54.21 (46.46, 61.77)
Not cleaning needles	332	68.58 (61.90, 74.57)
Unsafe acquisition	153	34.70 (28.38, 46.61)
Borrowing needles	72	16.75 (12.20, 22.55)
Lending needles	96	21.43 (15.98, 28.11)
Utilization of past-year drug treatment
Yes	185	42.93 (36.05, 50.09)
No	278	57.07 (49.91, 63.95)

Type of drug injected in the past year percentages do not sum to 100% because some IDUs reported injecting more than 1 type of drug in the past year.

Risky injection behavior percentages do not sum to 100% because some IDUs reported engaging in multiple risky injection behaviors in the past year.