Variable | Mean (SD), median | n (%) |
---|---|---|
Opioid use trajectory1 | ||
Age at first nonmedical PO use | 16.5 (3.0), 16 | |
Age at first heroin use | 19.1 (3.5), 19 | |
Age at first heroin injection | 20.4 (3.7), 20 | |
Age at first PO injection | 20.6 (3.6), 20 | |
Drug used at first injection | ||
POs | 26 (7) | |
Heroin | 289 (82) | |
Crack | 14 (4) | |
Other | 24 (7) | |
Number of months injected POs regularly2 (lifetime) | 10.2 (20.4), 0 | |
0 months | 261 (74) | |
1–12 months | 48 (14) | |
13–36 months | 29 (8) | |
> 36 months | 15 (4) | |
Number of months injected heroin regularly2 (lifetime) | 34.5 (34.9), 24 | |
0 months | 39 (11) | |
1–12 months | 104 (29) | |
13–36 months | 91 (26) | |
> 36 months | 119 (34) | |
Number of days injected POs in the past 30 days | 5.0 (16.0), 0 | |
0 days | 304 (86) | |
1–7 days | 32 (9) | |
8–15 days | 14 (4) | |
> 15 days | 3 (1) | |
Number of days injected heroin in the past 30 days | 18.6 (11.6), 20 | |
0 days | 56 (16) | |
1–7 days | 54 (15) | |
8–15 days | 44 (12) | |
> 15 days | 199 (56) | |
Type of opioid injected in the past 30 days | ||
Heroin only | 251 (71) | |
POs only | 3 (1) | |
Heroin and POs | 46 (13) | |
Neither heroin nor POs | 53 (15) |