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. 2021 Jan 6;2(1):119–124. doi: 10.1093/ehjdh/ztaa017

Table 3.

AI automatic auscultation compared to face-to-face auscultation

AI Face-to-face auscultation
Abnormal heart sound Normal heart sound Total
Abnormal heart sound 1162 18 1180
Normal heart sound 32 150 182
Total 1194 168 1362

Sensitivity, specificity, and k coefficient are calculated. Sensitivity of 97% (1162 of 1194; 95% CI: 96–98%), specificity of 89% (150 of 168; 95% CI: 84–94%), accuracy of 96% (1312 of 1362; 95% CI: 95–97%), and k coefficient of 0.84 (95% CI: 0.79–0.88).