Table 1 Demographic summary of participants in algorithm evaluation (SIF and OR).

SIF, supervised injection facility; OR, operating room.

SIF (n = 94)Age (years)43 ± 11
Height (cm)178 ± 8.3
Weight (kg)77 ± 12.4
Sex
Male, n (%)80 (85)
Female, n (%)14 (15)
Race
Caucasian, n (%)62 (66)
Black, n (%)2 (2)
First Nations, n (%)30 (32)
Drug injected
Fentanyl, n (%)17 (19)
Heroin, n (%)64 (68)
Morphine, n (%)12 (12)
Hydromorphone, n (%)1 (1)
OR (n = 20)
Age (years)33 ± 10.8
Height (cm)174 ± 9
Weight (kg)75 ± 14.6
Sex
Male, n (%)8 (40)
Female, n (%)12 (60)
Race
Caucasian, n (%)16 (80)
African American, n (%)2 (10)
Asian, n (%)1 (5)
Pacific Islander, n (%)1 (5)