Table 1 Characterization of NISDA assay performance in comparison with qRT-PCR.

From: RETRACTED ARTICLE: A non-enzymatic, isothermal strand displacement and amplification assay for rapid detection of SARS-CoV-2 RNA

Clinical samples

Sensitivity [95% CI]

Specificity [95% CI]

PPA [95% CI]

NPA [95% CI]

ln(DOR) [95% CI]

Lab. test

96.77% [89.8–99.4%]

100% [95.1–100%]

100% [94.5–100%]

97.01% [90.6–99.5%]

8.27 [6.68–9.86]

On-site test

100% [61.7–100%]

100% [88.2–100%]

100% [61.6–100%]

100% [86.1–100%]

6.61 [4.26–8.66]

All

97.06% [91.8–99.4%]

100% [96.2–100%]

100% [95.1–100%]

97.96% [92.1–99.7%]

8.75 [7.16–10.34]

  1. PPA, NPA, and ln(DOR) stand for positive predictive agreement, negative predictive agreement, and natural logarithm of diagnostics odds ratio, respectively.
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