Table 3.

Comparisons of mean percent correct on the 5-item Hepatitis C Virus Injection-risk Knowledge Scale (HCV-IRKS)


	Number	Mean percent correct	Degrees of freedom	t test statistic	p-value
Hepatitis C antibody positive result on OraQuick test	104	89.2	239	−6.33	<0.0001
Hepatitis C antibody negative result on OraQuick test	425	71.7	239	−6.33	<0.0001
Previously tested for HCV	366	83.2	257	−8.30	<0.0001
Not previously tested for HCV	166	56.5	257	−8.30	<0.0001
Positive result on previous HCV test (self-report)	75	90.7	166	−3.25	0.001
Negative result on previous HCV test (self-report)	274	80.9
Lifetime drug injection	343	87.2	284	−12.3	<0.0001
No lifetime drug injection	187	51.4	284	−12.3	<0.0001
Past 30 day injection (among ever injectors)	301	87.8	346	−1.13	0.2586
No past 30 day injection (among ever injectors)	44	83.4	346	−1.13	0.2586
Very/somewhat concerned about getting HCV	300	75.5	448	−2.47	0.0138
Not at all concerned about getting HCV	150	67.1	448	−2.47	0.0138
Very often/often/sometimes talked about HCV with drug-using friends	183	86.9	499	−6.91	<0.0001
Rarely/never talked about HCV with drug-using friends	345	68.8	499	−6.91	<0.0001
Learned about HCV from primary doctor or in drug treatment	375	78.2	252	−3.40	0.0008
Never learned about HCV from primary doctor or in drug treatment	157	66.8	252	−3.40	0.0008
Learned about HCV from syringe exchange, harm reduction, other service provider	245	84.4	527	−6.41	<0.0001
Never learned about HCV from syringe exchange, harm reduction, other service provider	278	66.7	527	−6.41	<0.0001