Table 2.

Performance Metrics of Various Measurements for Identifying TTP.

	Cut off point	AUC	95%CI	sensitivity	95%CI	specificity	95%CI
D-dimer	9.8	0.80	0.67–0.93	0.81	0.54–0.96	0.69	0.50–0.84
FDP	22.8	0.75	0.61–0.90	0.81	0.54–0.96	0.63	0.44–0.79
FDP/D-dimer	1.93	0.78	0.65–0.91	1.00	0.71–1.00	0.56	0.38–0.74
PT-INR	1.07	0.84	0.71–0.96	0.81	0.54–0.95	0.84	0.67–0.95
LD	554	0.92	0.85–1.00	0.88	0.62–0.98	0.84	0.67–0.95
LD/Hb	53.7	0.96	0.91–1.00	0.94	0.70–1.00	0.91	0.75–0.98