Table 2.

Factors associated with seeking medical advice about an abscess, sore or open wound, or redness, swelling and tenderness at an injection site in the previous 12 months among people who inject drugs

Characteristics	Yes	n	Total, N	P	aOR	(95% CI)
Abscess
Gender
Male	65%	79	121		1·00
Female	85%	33	39	0·022	3·04	(1·14–8·13)
Recruitment site
Bristol	62%	40	65
Leeds	80%	40	50
Birmingham	71%	32	45	0·099	†
Anti-HCV test result
Positive	76%	81	107		1·00
Negative	58%	31	53	0·025	0·46	(0·22–0·93)
Sore or open wound
Homelessness
Never	25%	1	4
Yes, not preceding year	33%	13	39
Yes, preceding year	57%	24	42	0·071	†
Migration, years lived in current area
⩽1	75%	6	8
2–10	48%	11	23
11–20	64%	9	14
⩾21	30%	12	40	0·033	†
Anti-HBc test result
Positive	63%	12	19
Negative	40%	27	67	0·077	†
Anti-HCV test result
Positive	56%	31	55		1·00
Negative	26%	8	31	0·006	0·25	(0·09–0·66)
Redness, swelling and tenderness
Gender
Male	34%	105	306
Female	50%	54	109	0·005	2·41	(1·49–3·91)
Years since first injected
<5	23%	20	86
5–9	39%	45	116
10–14	47%	53	113
⩾15	41%	41	100	0·007	†
Injected cocaine preceding year
No	35%	119	344		1·00
Yes	56%	40	71	<0·001	2·37	(1·36–4·14)
Injected crack preceding year
No	30%	45	149
Yes	43%	113	265	0·012	†
Imprisonment
Never	38%	31	81
Yes, not preceding year	44%	88	202
Yes, preceding year	30%	39	131	0·041	†
Main source of income
Licit	35%	95	272
Illicit	45%	63	141	0·053	†
Sex preceding year
No	40%	29	72
Yes, but not paid	36%	111	311
Yes, but paid	60%	18	30	0·030	†
Recruitment site
Bristol	39%	59	150		1·66	(0·98–2·82)
Leeds	52%	63	121		2·53	(1·45–4·41)
Birmingham	25%	36	143	<0·001	1·00
Anti-HBc test result
Positive	54%	46	85
Negative	34%	112	328	<0·001†
Anti-HCV test result
Positive	49%	101	206		1·00
Negative	28%	58	208	<0·001	0·50	(0·32–0·77)

aOR, Adjusted odds ratio; CI, confidence interval.

^†Not included in the final model.