From: Can spirometric norms be set using pre- or post- bronchodilator test results in older people?
<70% using pre-bronchodilator | <70% using pre-bronchodilator + K | |||||
---|---|---|---|---|---|---|
Sensitivity | Specificity | Youden’s index | Sensitivity | Specificity | Youden’s index | |
FEV1/FVC | 90% | 85% | 0.75 | 79% | 94% | 0.73 |