Table 2. The factors associated with unvaccination among people who use drugs by the characteristics.

Characteristic	OR (95% CI)	P value
Abbreviation: OR=odds ratio; IDs=infectious diseases; CDs=chronic diseases.
Sex
Men	1.00
Women	0.82 (0.56–1.22)	0.336
Age (years)
≥60	1.00
50–59	0.68 (0.33–1.40)	0.297
40–49	0.45 (0.21–0.97)	0.040
30–39	0.57 (0.26–1.25)	0.160
19–29	1.31 (0.54–3.16)	0.547
Occupation
Public institution&enterprise	1.00
Service industry	2.52 (1.33–4.77)	0.040
Unemployed	3.81 (2.03–7.14)	<0.001
Missing	2.70 (1.33–5.46)	0.006
Type of drugs used
Only opioid	1.00
Only synthetic	0.61 (0.36–1.04)	0.071
New psychoactive substance	0.87 (0.27–2.84)	0.817
Polydrug use	0.68 (0.33–1.41)	0.300
Missing	4.01 (0.59–27.35)	0.156
Status of last treatment
Completed	1.00
Drug maintenance therapy	1.55 (0.31–7.87)	0.594
Compulsory isolated detoxication	1.10 (0.48–2.51)	0.820
Administrative detention	0.94 (0.49–1.79)	0.847
Community-based detoxification treatment	1.85 (1.06–3.23)	0.031
Community-based rehabilitation treatment	0.70 (0.35–1.37)	0.296
Missing	3.31 (1.83–5.96)	<0.001
Years of using drugs
≤5	1.00
6–10	1.14 (0.68–1.91)	0.608
11–5	1.16 (0.70–1.93)	0.565
≥16	2.05 (0.81–5.15)	0.129
Missing	1.50 (0.80–2.80)	0.203
Mode of using drugs
Oral	1.00
Injection	1.05 (0.51–2.15)	0.904
Oral & injection	1.96 (0.91–4.20)	0.086
Missing	0.33 (0.11–0.99)	0.048
Diseases records
No diseases	1.00
Only IDs	9.49 (3.67–24.59)	<0.001
Only CDs	8.22 (5.19–13.03)	<0.001
IDs & CDs	3.73 (1.12–12.41)	0.032