Key result
Biotin-insensitive troponin T reagents are linked to ~138% more analytical outliers than biotin-sensitive reagents.
Why the study?
Analytical outlier rates for cardiac troponin T needed to be compared between biotin sensitive and insensitive testing reagents and testing platforms.
Does the use of biotin-insensitive cTnT reagent on the Cobas e601 analyzer affect analytical outlier rates compared to biotin-sensitive reagent on the Cobas e411 analyzer in hospitalized patients?
Observational (n=4,552)
Does the use of biotin-insensitive cTnT reagent on the Cobas e601 analyzer affect analytical outlier rates compared to biotin-sensitive reagent on the Cobas e411 analyzer in hospitalized patients?
Absolute Event Rate: 8.1% vs 3.4%
p-value: p=<0.0001
The biotin-insensitive cTnT reagent on the Cobas e601 analyzer is associated with more than double the rate of analytical outliers compared to the biotin-sensitive reagent on the Cobas e411.
Biotin-insensitive cTnT on e601 may increase verification needs in labs; leaves open optimal assay selection for routine use.
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Karon et al. (2026) conducted an observational in Hospitalized patients requiring cTnT testing (n=4,552). Biotin-insensitive reagent on Roche Cobas e601 vs. Biotin-sensitive reagent on Roche Cobas e411 was evaluated on Analytical outliers (repeat value differing from initial by a critical difference) (p=<0.0001). Cardiac troponin T analytical outliers occurred more frequently using biotin-insensitive reagent on the Cobas e601 (8.1%) compared to biotin-sensitive reagent on the Cobas e411 (3.4%; p<0.0001).
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