Table 2.

PASS thresholds for each measure defined by the 75th percentile of the cumulative distribution, for patient who rated their condition as PASS positive, by plotting ROC curves and identifying cut-offs that yielded 80% specificity and by plotting ROC curves and identifying cut-offs that yielded the smallest number of false-positives and false-negatives.

Variable	PASS + 75th percentile threshold	80% specificity cut-off	ROC cut-off	Sensitivity/specificity	AUC-ROC curve
ROAD (0–76)	1.00	1.10	1.50	92.7/60.1	0.788
PRO-CLARA (0–10)	2.50	2.60	2.90	89.1/82.7	0.933
RAID (0–10)	2.00	2.10	2.60	96.4/73.4	0.862
CDAI (0–76)	13.83	15.85	14.21	81.8/91.6	0.925