Table 3 Sensitivity and specificity of the ten main variables to identify cluster B, utilizing the cut-off values giving the best sum of sensitivity and specificity (The Youden index)
Variable | Cut-off value | Sensitivity | Specificity |
|---|---|---|---|
Trigger sum | ≥ 5 | 85% | 80% |
Number of cough background disorders | ≥ 1 | 88% | 74% |
Absence of idiopathic cough | Yes/no | 88% | 74% |
LCQ physical domain | ≤ 4.7 | 81% | 71% |
LCQ question 9 a | ≤ 5 | 73% | 77% |
LCQ total score | ≤ 15.0 | 76% | 76% |
Dyspnea with wheezing | Yes/no | 65% | 85% |
Strong paints or fumes as a cough trigger | Yes/no | 68% | 81% |
Current asthma | Yes/no | 56% | 96% |
Current medication for asthma | Yes/no | 58% | 88% |