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Table 2 Performance of RSNA classification

From: The role of chest imaging in the diagnosis, management, and monitoring of coronavirus disease 2019 (COVID-19)

First author Country Inclusion period [in 2020] Number of patient RT-PCR positivity (%) Typical appearance Typical or indeterminate appearance
Sen Spe PPV NPV Sen (%) Spe (%) PPV (%) NPV (%)
Barbosa [60] Brazil Feb to Mar 91 28 64% 85% 61% 86% 92 62 48 95
Cicaresse [61] Italy 2/27–3/27 460 46 72% 92% 88% 79% 89 67 69 87
Falaschi [62] Italy 3/3–4/9 773 60 91 79 86 85
Santos [63] Brazil 3/13–3/23 71pt/75CT 45 83% 97% 95% 87% 92 79 78 92
Som [64] USA 1/15–3/30 89 40 86% 80% 74% 89% 98 55 60 98
Colombi [65] Italy 3/30–4/13 239 45 85 69 69 85
Inui [49] Japan 1/30–6/30 100 50 74% 83% 81% 76% 92 41 61 84
De Saliva Teles [66] Brazil 3/15–3/24 175 50 74% 98% 97% 79% 83 88 87 84
  1. RSNA Radiological Society of North America, RT-PCR real-time reverse transcription polymerase chain reaction, Sen sensitivity, Spe specificity, PPV positive predictive value, NPV negative predictive value, pt patients, CT computed tomography