Table 2.

Accuracy of the prediction score of the nomogram for estimating the risk of IAs instability.

Variable	Derivation cohort	Validation cohort
Area under the curve	0.803 (0.764, 0.842)	0.744 (0.677, 0.812)
Cutoff score	90	90
Sensitivity	82.6%	78.8%
Specificity	69.3%	52.5%
Positive predictive value	65.9%	52.5%
Negative predictive value	84.75%	78.8%