Table 1 Demographic, drug use characteristics, and treatment history characteristics associated with willingness to use SIS among PWID
Characteristic | Total sample (n = 197) | Willingness to use SIS | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | |
|---|---|---|---|---|---|
Yes (n = 170) n (%) | No or maybe (n = 27) n (%) |  |  | ||
Age, year | |||||
 Median (IQR) | 39 (33–50) | 39 (32–50) | 40 (35–48) | 0.99 (0.95–1.03) | 1.00 (0.96–1.05) |
Gender | |||||
 Female | 75 (38.1) | 57 (76.0) | 18 (24.0) | 0.25* (0.11–0.60) | 0.29* (0.11–0.75) |
 Male | 122 (61.9) | 113 (92.6) | 9 (7.4) |  |  |
Ethnicity | |||||
 White | 139 (72.8) | 120 (86.3) | 19 (13.7) | 0.98 (0.39–2.50) | 0.63 (0.22–1.77) |
 Other | 52 (27.2) | 45 (86.5) | 7 (13.5) |  |  |
Housing | |||||
 Unstable | 114 (57.9) | 103 (90.3) | 11 (9.7) | 2.24 (0.97–5.11) | 1.42 (0.53–3.80) |
 Stable | 83 (42.1) | 67 (80.7) | 16 (19.3) |  |  |
Sex work | |||||
 Yes | 38 (19.3) | 33 (86.8) | 5 (13.2) | 1.06 (0.37–3.01) | – |
 No | 159 (80.7) | 137 (86.2) | 22 (13.8) |  |  |
Any public injectinga | |||||
 Yes | 139 (71.9) | 127 (91.4) | 12 (8.6) | 3.61* (1.55–8.44) | 2.76* (1.00–7.62) |
 No | 55 (28.4) | 41 (74.5) | 14 (25.5) |  |  |
Any injecting alonea | |||||
 Yes | 172 (87.3) | 151 (87.8) | 21 (12.2) | 2.27 (0.82–6.33) | 1.68 (0.56–5.10) |
 No | 25 (12.7) | 19 (76.0) | 6 (24) |  |  |
Any help injectinga | – | ||||
 Yes | 63 (32.0) | 56 (88.9) | 7 (11.0) | 1.40 (0.56–3.52) |  |
 No | 134 (68.0) | 114 (85.1) | 20 (14.9) |  |  |
Syringe sharinga | – | ||||
 Yes | 44 (22.4) | 39 (88.6) | 5 (11.4) | 1.32 (0.47–3.72) |  |
 No | 152 (77.6) | 130 (88.5) | 22 (14.5) |  |  |
Daily opioidb injectinga | – | ||||
 Yes | 106 (53.8) | 95 (89.6) | 11 (10.4) | 1.84 (0.81–4.20) |  |
 No | 91 (46.2) | 75 (82.4) | 16 (17.6) |  |  |
Daily crystal meth injectinga | |||||
 Yes | 70 (35.5) | 64 (91.4) | 6 (8.6) | 2.11 (0.81–5.51) | – |
 No | 127 (64.5) | 106 (83.5) | 21 (16.5) |  |  |
Ever OD? | – | ||||
 Yes | 48 (24.7) | 42 (87.5) | 6 (12.5) | 1.18 (0.45–3.11) |  |
 No | 146 (75.3) | 125 (85.6) | 21 (14.4) |  |  |
Drug treatment history | – | ||||
 Yes | 83 (42.8) | 73 (88.0) | 10 (12.0) | 1.32 (0.57–3.05) |  |
 No | 111 (57.2) | 94 (84.7) | 17 (15.3) |  |  |