This pairing was also numerically less sensitive than the Roche assay alone (70% [89/128]), although the difference did not quite reach statistical significance ( P = 0.06).
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Evaluation of Three Commercial SARS-CoV-2 Serologic Assays and Their Performance in Two-Test Algorithms.
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The sentences
However, the sample size of the former cohort was small, and these differences did not reach statistical significance.