Table 3: Youden-Index in relation to synovial cell count with sensitivity and specificity for histopathologic infection persistence.

Youden-IndexSWBCC (cells/μl)SensitivitySpecificity

0.000991.0000.000
0.0711751.0000.071
0.0002750.9290.071
0.2143500.9290.286
0.2864500.9290.357
0.2145500.8570.357
0.1436500.7860.357
0.0007500.6430.357
0.1439500.6430.500
0.00012000.5000.500
0.07113500.5000.571
0.14315000.5000.643
0.00016500.3570.643
0.07121500.3570.714
0.14327000.3570.786
0.21428500.3570.857
0.28632500.3570.929
0.21444500.2860.929
0.14355250.2140.929
0.07168250.1430.929
0.143105000.1431.000
0.071135500.0711.000
0.000140000.0001.000

SWBCC: synovial white blood cell count.