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Table. 2.

Risk stratification based on the three diagnostic scoring systems for the prediction of TMA due to severe ADAMTS13 deficiency

Scoring system Number of risk groups Risk category Patients, N (%) P*

TMA (–) TMA (+)
FTMA-S Three L 7 (6.9) 0 (0.0) 0.006
I 48 (47.5) 12 (27.3)
H 46 (45.6) 32 (72.7)
Two L–I 55 (54.5) 12 (27.3) 0.003
H 46 (45.5) 32 (72.7)
PLASMIC-S Three L 49 (48.5) 2 (4.5) < 0.001
I 34 (33.7) 6 (13.6)
H 18 (17.8) 36 (81.8)
Two L–I 83 (82.2) 8 (18.2) < 0.001
H 18 (17.8) 36 (81.8)
B-S Three L 94 (93.1) 35 (79.6) 0.055
I 5 (4.9) 7 (15.9)
H 2 (2.0%) 2 (4.5%)
Two L–I 99 (98.0) 42 (95.5) 0.585
H 2 (2.0) 2 (4.5)

*P-values were obtained using the chi-square/Fisher’s exact test (for numbers <5 in each section).

Abbreviations: TMA, thrombotic microangiopathy; ADAMTS13, a disintegrin and metalloprotease with thrombospondin type 1 motif, member 13; FTMA-S, French TMA score; PLASMIC-S, PLASMIC score; B-S, BENTLEY score; L, low risk; I, intermediate risk; H, high risk.

Ann Lab Med 2023;43:485~492 https://doi.org/10.3343/alm.2023.43.5.485

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