Utility of the Leicester Cough Questionnaire(LCQ) predicting mild disease
| LCQ score | Sensitivity | Specificity | LR+ | LR− | Post-Test OR | PPV | NPV |
| ≥20 | 57.5 | 91.2 | 6.5 | 0.5 | 3.3 | 76.7 | 81.1 |
| ≥19 | 65 | 85 | 4.3 | 0.4 | 2.2 | 68.4 | 82.9 |
| ≥18 | 75 | 76.2 | 3.15 | 0.3 | 1.6 | 61.2 | 85.9 |
| ≥17 | 87.5 | 68.7 | 2.8 | 0.18 | 1.4 | 58.3 | 91.7 |
Prevalence was 33.33% and pre-test odds ratio (OR) was 0.5. LR+: likelihood ratio for a positive test; LR−: likelihood ratio for a negative test; PPV: positive predictive value; NPV: negative predictive value.