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Table 2 Test performance characteristics for pooled sputum samples on the CovidNudge platform, London, 2020

From: Pooled sputum to optimise the efficiency and utility of rapid, point-of-care molecular SARS-CoV-2 testing

  POOLED SAMPLES
POSITIVE INDETERMINATE NEGATIVE
INDIVIDUAL
SAMPLES
POSITIVE 51 2 0
INDETERMINATE 0 0 0
NEGATIVE 0 0 200
  1. Legend: 53 patients with positive individual samples were tested with 200 negative results. Pools were either tested as 10 negative samples, or one positive sample with 9 negative samples. An indeterminate result is reported when only one or two replicates amplify, i.e. the signal is at the limits of detection. Pooled samples demonstrated 96.23% sensitivity (95% CI = 87.0–99.5) and 100% specificity (95% CI = 98.2–100) against individual samples