Egyptian Rheumatology and Rehabilitation

Table 4 Validity of albumin, fibrinogen, FAR, ESR, and CRP for the discrimination between the AS and control groups (diagnosis of AS)

From: Serum fibrinogen to albumin ratio in patients with ankylosing spondylitis: correlation with disease activity and severity

	Albumin	Fibrinogen	FAR	ESR	CRP
AUC	0.987	0.988	0.998	0.917	0.877
Cutoff	< 4	316	77.9	15.5	5.5
Sensitivity (%)	90	90	96.7	86.7	83.3
Specificity (%)	95	100	100	100	100
PPV (%)	90	90	96.7	86.7	83.3
NPV (%)	95	100	100	100	100
Accuracy (%)	92	94	98	92	90

AUC Area under the ROC curve, PPV Positive predictive value, NPV Negative predictive value

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