Table 1.

Demographic Details of EU Cases and Controls

Variable measured	Exposed uninfecteds (n = 21)	Controls (n = 7)
Age (mean [SD], range)	29.7 ± 5.9	28.3 ± 4.3
Gender (male:female)	18:3	6:1
Number of test	56	20
Number of observations [median, (range)]	2 (2–6)	3 (2–3)
Interval between studies (range)	5 weeks to 9 months	3 weeks to 15 months
Duration of IDU [mean (SD), (range)]	8.6 ± 7.4 (0.5–26 years)
Lifetime injecting episodes [median, (range)]	8760 (548–28,470)
Sharing injecting paraphernalia	21 (100%)
Shared needles	18 (85%)
Shared with a confirmed source of HCV	9 (43%)

NOTE. EU: exposed uninfected; HCV: hepatitis C virus.