|
Characteristic
|
N
|
%
|
|---|
|
Sex
|
|
Male
|
51
|
96
|
|
Female
|
3
|
4
|
|
Age
|
|
Median (IQR)
|
28
|
25–32
|
|
Race
|
|
Mixed ancestry
|
3
|
6%
|
|
Black African
|
34
|
63%
|
|
Indian ancestry
|
3
|
6%
|
|
White
|
14
|
26%
|
|
> 10 years drug use history
|
30
|
56%
|
|
Criminal record
|
28
|
53%
|
|
Frequency of heroin use (current)
|
|
Daily
|
1
|
2%
|
|
1–2 times per day
|
4
|
7%
|
|
3–4 times per day
|
15
|
28%
|
|
> 4 times
|
31
|
57%
|
|
Missing
|
3
|
6%
|
|
Duration of pattern of use
|
|
1–3 months
|
1
|
2%
|
|
3–6 months
|
3
|
6%
|
|
> 6 months
|
47
|
87%
|
|
Missing
|
3
|
6%
|
|
Injected heroin in last year
|
10
|
19%
|
|
Drugs detected on urine (baseline)
|
|
Opioids
|
54
|
100%
|
|
Cannabis
|
17
|
32%
|
|
Cocaine
|
8
|
15%
|
|
Amphetamine
|
1
|
2%
|
|
Methamphetamine
|
6
|
11%
|
|
Benzodiazepines
|
1
|
2%
|
|
HIV positive
|
7
|
13%
|
|
ECG abnormalitiesa
|
0
|
0%
|
- aNo abnormalities suggestive of cardiac disease
