Table 1.

Socio-demographic characteristics of PWUD

Variables	PWID = 119						Non PWID = 1507
	Men		Women		Total		Men		Women		Total
	Freq.	%	Freq.	%	Freq.	%	Freq.	%	Freq.	%	Freq.	%
Regional provincesa
Low risk provinces	23	22.3	2	12.5	25	21.0	745	61.9	73	26.8	818	55.4
High risk provinces	80	77.7	14	87.5	94	79.0	459	38.1	199	73.2	658	44.6
Age, median (IQR)b, years	28 (24–31)		30 (26–34)		28 (24–32)		23 (20–28)		27 (22–31)		24 (20–29)
Age groups
≤ 20 years old	12	12.1	1	6.3	13	11.3	351	29.6	46	17.2	397	27.3
21–29 years old	50	50.5	6	37.5	56	48.7	594	50.1	138	51.7	732	50.4
≥ 30 years old	37	37.4	9	59.2	46	40.0	240	20.3	83	31.1	323	22.3
Marital status
Married	48	47.1	14	87.5	62	52.5	472	39.5	225	83.0	697	47.5
Non-married	54	52.9	2	12.5	56	47.5	723	60.5	46	17.0	769	52.5
Education, median (IQR), years	7 (3–9)		3 (1–6)		6 (3–8)		8 (6–10)		4 (0–7)		7 (5–9)
Education level
0–6 years in school	49	50.0	3	18.7	62	54.4	745	65.3	71	26.8	591	42.0
≥ 7 years in school	49	50.0	13	81.3	52	45.6	397	34.7	194	73.2	816	58.0
Report current living places
Parent	36	35.3	1	6.2	36	30.5	708	59.3	42	15.5	763	51.0
Spouse	15	14.7	4	25.0	19	16.0	272	22.8	56	20.7	332	22.2
Friend	15	14.7	4	25.0	18	15.3	60	5.0	54	19.9	117	7.8
Street	5	4.9	0	0.0	5	4.3	15	1.3	20	7.4	38	2.5
Others	31	30.4	7	43.8	40	33.9	139	11.4	99	36.5	245	16.5

^aHigh risk provinces: Sihanoukville, Phnom Penh, Battambang, Banteay Meanchey

Low risk provinces: Kampong Speu, Kampong Cham, Prey Veng, Svay Rieng, Siem Reap

^bIQR interquartile range