Performance characteristics of the COBAS AMPLICOR hepatitis C virus MONITOR Test, version 2.0.
We evaluated the performance characteristics of the COBAS AMPLICOR Hepatitis C Virus (HCV) MONITOR Test, version 2.0. Dilution studies using patient specimens demonstrated a lower limit of detection of 1,000 copies per milliliter. The assay was linear from 1,000 to 1 million HCV RNA copies per milliliter. Within-run precision and between-run precision were acceptable (approximately 0.100 and 0.14 SD for log10 [copies per milliliter]). A comparison of this version of the test (y), with the manual AMPLICOR HCV MONITOR Test, version 1.0 (x), yielded the following Deming regression equation: y = 1.004(+/- 0.04)x + 0.654(+/- 0.22); Sy/x¿D = 0.336; n = 92; r2 = 0.846; r = 0.920. Further comparison of the COBAS version 2.0 assay (x) with the QUANTIPLEX HCV bDNA Test (y) yielded the following Deming regression equation: y = 0.943 (+/- 0.130)x + 0.473 (+/- 0.717); Sy/x¿D = 0.194; n = 26; r2 = 0.600; r = 0.774. Version 2.0 detected the spectrum of HCV genotypes better than version 1.0.
Erali
M
M
ARUP Institute for Clinical and Experimental Pathology, Salt Lake City, UT 84108, USA.
Ashwood
E R
ER
Hillyard
D R
DR
D005069:Evaluation Studies as Topic; D005838:Genotype; D016174:Hepacivirus / Q000145:classification / Q000235:genetics*; D006526:Hepatitis C / Q000175:diagnosis*; D006801:Humans; D012367:RNA, Viral / Q000032:analysis*; D011933:Reagent Kits, Diagnostic / Q000592:standards*; D015203:Reproducibility of Results; D020133:Reverse Transcriptase Polymerase Chain Reaction
D012367:RNA, Viral; D011933:Reagent Kits, Diagnostic