Table 4.

Accuracy of classification criteria for diagnosis of PMR with shoulder and knee US

	2012 ACR/EULAR clinical classification criteria without US	2012 ACR/EULAR classification criteria with shoulder and knee US
Area under the ROC curve (95% CI)	0.876 (0.820, 0.933)	0.942 (0.905, 0.979)
Sensitivity, % (95% CI)	87 (79, 96)	90 (82, 98)
Specificity, % (95% CI)	68 (58, 78)	83 (75, 91)
Positive predictive value, % (95% CI)	67 (57, 77)	79 (74, 84)
Negative predictive value, % (95% CI)	87 (79, 95)	92 (86, 98)

ROC: receiver operating characteristic.