Youden’s index* | Cut-point | Sensitivity | Specificity | |
Deterioration in FVC % predicted | ||||
L-PF Dyspnoea score | 0.26 | 5.6 | 0.49 | 0.77 |
L-PF Cough score | 0.18 | 4.2 | 0.50 | 0.67 |
Deterioration in L-PF questionnaire global physical health score | ||||
L-PF Dyspnoea score | 0.19 | 6.3 | 0.52 | 0.67 |
L-PF Cough score | 0.12 | 16.7 | 0.35 | 0.78 |
Deterioration in L-PF questionnaire global quality of life score | ||||
L-PF Dyspnoea score | 0.18 | 1.7 | 0.67 | 0.51 |
L-PF Cough score | 0.16 | 4.2 | 0.55 | 0.61 |
*Index defining the cut-point that maximises sensitivity and specificity.
FVC, forced vital capacity; L-PF, Living with Pulmonary Fibrosis.