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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

From: 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

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
  1. * 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.