The Combination of ¹⁸F-Fluorodeoxyglucose Positron Emission Tomography Metabolic and Clinical Parameters Can Effectively Distinguish Rheumatoid Arthritis and Polymyalgia Rheumatic

Table 4

Comparison of the combination with ¹⁸F-FDG PET metabolic parameters and clinical parameters to only clinical parameters with IDI.

Variable	AUC	Sen (%)	Spe (%)	P value	IDI (%)	95% CI	P value
Combination1	0.892	90.3	82.6	<0.001	9.51	0.015–0.176	0.021
Combination2	0.884	93.5	73.9	<0.001	7.79	0.003–0.153	0.041
Combination3	0.882	93.5	73.9	<0.001	—	—	—

Combination1: the combination of SUVmax plus RF; Combination2: the combination of SUVmax plus anti-CCP Ab; Combination3: the combination of SUVmax plus RF plus anti-CCP Ab; AUC: area under curve; SUVmax: maximum standardized uptake value; Sen: sensitivity; Spe: specificity; IDI: integrated discrimination improvement; 95% CI: 95% confidence interval. The significance of bold values is P < 0.05, which means differences were considered statistically significant.