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Table 2 Diagnostic criteria for DIC

From: Chinese expert consensus on diagnosis and treatment of coagulation dysfunction in COVID-19

IndexScoreISTHCDSS
PLT (×109/L)0> 100> 100
1≤10080–100
  24 h decrease ≥50%
2≤ 50<  80
PT/APTT (s)0PT extension < 3PT extension < 3 and APTT extension < 10
1PT extension ≥3 and < 6PT extension ≥3 or APTT extension ≥10
2PT extension ≥6PT extension ≥6
Fibrin-related indicators, (μg/mL)0DD < 2.5 
1< 5
2Moderate increase, 2.5 ≤ DD < 5.05 ≤ DD < 9
3Severe increase, DD ≥ 5.0≥9
Fibrinogen (g/L)0≥1.0≥1.0
1< 1.0< 1.0
Underlying disorder known to be associated with DIC0necessary 
2 presence
 Clinical manifestation1 abnormal bleeding;unexplained organ failure; shock or microcirculatory disorder (meet anyone 1 point)
Total score  ≥ 5 ≥ 7