Diagnostic risk classification of poor outcome according to the simplified RISSC85 in 2001 patients with acute cough, and sensitivity, specificity, positive, and negative predictive values for different thresholds
| Score (risk category)a | Patients with poor outcome, n (n= 398) | Patients without poor outcome, n (n= 1603) | Sensitivity, % | Specificity, % | PPV, % | NPV, % |
|---|---|---|---|---|---|---|
| 5 | 7 | 5 | 2 | 100 | 58 | 80 |
| 4 | 27 | 66 | 9 | 96 | 32 | 81 |
| 3 | 139 | 367 | 43 | 73 | 28 | 84 |
| 2 | 181 | 783 | 89 | 24 | 22 | 90 |
| 1 | 40 | 330 | 99 | 3 | 20 | 93 |
| 0 | 4 | 52 |
↵a Score calculated as +1*group (B or C) +1*interference with daily activities +1*crackles +1*diastolic blood pressure low (<85 mmHg) +1*years stopped smoking high (>45 years ago) +1*sputum (severe). Using 3 (full line), 2 (dashed line), or 4 (dotted line) as a threshold, the number of patients above the respective line get a positive test result whereas numbers below the line get a negative test result. NPV = negative predictive value. PPV = positive predictive value.