Volume 15, Number 4—April 2009
THEME ISSUE
The Amazon Region
Letter
Hepatitis C Virus in Blood Donors, Brazil
Figure
![Distribution of hepatitis C virus (HCV) enzyme immunoassay signal-to-cutoff (S/CO) values by recombinant immunoblot assay (RIBA) interpretations among HCV-RNA–positive [PCR (+)] and HCV-RNA–negative [PCR (−)] donated blood samples. Group a differs statistically from all groups b with 95% confidence intervals. The Mann-Whitney test was used to compare the 2 groups. (+), positive; (−), negative; (Ind), indeterminate. *S/CO values outside interquartile intervals; †Kruskal-Wallis test.](/eid/images/08-1288-F1.jpg)
Figure. Distribution of hepatitis C virus (HCV) enzyme immunoassay signal-to-cutoff (S/CO) values by recombinant immunoblot assay (RIBA) interpretations among HCV-RNA–positive [PCR (+)] and HCV-RNA–negative [PCR (−)] donated blood samples. Group a differs statistically from all groups b with 95% confidence intervals. The Mann-Whitney test was used to compare the 2 groups. (+), positive; (−), negative; (Ind), indeterminate. *S/CO values outside interquartile intervals; †Kruskal-Wallis test.
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