Table 2.

Diagnostic accuracy of clinical and instrumental variables

	Total	Diagnostic accuracy	Specificity	Sensitivity
Dyspnoea	29.1	64.6	81.3	41.2
Dry cough	12.1	58.3	89.2	15.1
Thoracic X-ray	35.1	71.3	80	57.8
DLCO < 47%	26	54.9	80	30.8
FVC < 70%	18.9	52.8	82.1	20
Velcro cracklesa	49.2	67.2	65.7	69.1
VECTOR	52.9	83.9	76.9	93.2

^apresence of Velcro crackles according to rheumatologist’s auscultation (AM)