| AUC | Cut-off value | Sensitivity, % (95 % CI) | Specificity, % (95 % CI) | Likelihood ratio |
---|
BAFF | 0.823 | 1.7 ng · mL−1 | 67.6 (49.4 to 82.6) | 94.7 (73.9 to 99.8) | 12.85 |
KL-6 | 0.566 | 1562 U · mL−1 | 79.4 (62.1 to 91.3) | 52.6 (28.8 to 75.5) | 1.67 |
SP-D | 0.643 | 158 ng · mL−1 | 47.1 (29.7 to 64.8) | 77.7 (52.3 to 93.5) | 2.11 |
- BAFF: B cell–activating factor belonging to the tumour necrosis factor family; SP-D: surfactant protein D; KL-6: Krebs von den Lungen-6; CTD-ILD: interstitial lung disease associated with connective tissue disease; CFIP: chronic fibrosing interstitial lung disease; ROC: receiver operating characteristic; AUC: area under the ROC curve; CI: Confidence interval