22
Nov
May is a consultant for Roche Diagnostics.. unfavorable percent agreement (NPA) were calculated. Antibody concentrations were compared across the platforms and populations. Results A total of 588 remnant samples derived from 500 patients were tested. PPA at 5C12 weeks post-PCR positive results for Assays A-D was 98.3, 97.4, 99.2, and 95.8% respectively. NPA was 100% across all platforms. Mean antibody concentrations at 2C4 weeks post-PCR positive result were significantly higher in hospitalized versus non-hospitalized patients, respectively, for Assay A (131.8 [101.7] vs. 95.6 [100.3] AU/mL, P?