Quantifying hepatitis C transmission risk using a new weighted scoring system for the Blood-Borne Virus Transmission Risk Assessment Questionnaire (BBV-TRAQ): Applications for community-based HCV surveillance, education and prevention

Table 5 Comparisons* between self-report HCV status groups and weighted and unweighted BBV-TRAQ total and injecting subscales scores among sub-samples of IDU

Sub-sample	Weight	BBV-TRAQ Score	F	p-value	mean difference (HCV positive & negative)	95% CI of the difference
Initiated injecting ≤ 3 years	None	Injecting subscale	3.93	.033	10.76	0.63 – 20.88
		Total	2.65	.076	14.5	-1.05 – 30.05
	Log 1	Injecting subscale	4.48	.016	46.35	6.66 – 86.04
		Total	4.19	.018	54.35	7.12 – 101.58
	Log 2	Injecting subscale	5.49	.005	120.02	28.99 – 211.04
		Total	5.41	.006	130.32	31.25 – 229.39
	Log 5	Injecting subscale	7.11	.001	3,696	1,278 – 6,113
		Total	7.19	.001	3,752	1,298 – 6,205
Aged ≤ 25 years	None	Injecting subscale	12.50	<.001	12.97	6.69 – 19.24
		Total	8.97	<.001	17.15	7.36 – 26.93
	Log 1	Injecting subscale	13.66	<.001	53.88	28.95 – 78.82
		Total	12.08	<.001	61.28	31.15 – 91.41
	Log 2	Injecting subscale	14.46	<.001	134.11	73.86 – 194.36
		Total	13.70	<.001	143.11	77.05 – 209.16
	Log 5	Injecting subscale	14.16	<.001	3,915	2,132 – 5,698
		Total	13.69	<.001	3,939	2,114 – 5,764

* Comparisons were made between all HCV groups (i.e., inclusive of 'never tested/not sure' group). To simplify tables only results relevant to the focus of this paper have been presented (i.e., 'HCV positive' and 'HCV negative'). No differences were detected between the 'never tested/not sure' and other groups.

ISSN: 1477-7517