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Table 2 WHO 1997 criteria for dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS)

From: Confirmed adult dengue deaths in Singapore: 5-year multi-center retrospective study

Criteria No.(%) of patients
DHF (fulfilling all 4 criteria): 10 (35.7)
DHF (fulfilling 3 criteria excluding bleeding): 28 (100.0)
   Fever 27 (96.4)
   Platelet ≤100 × 10^9/L 26 (92.9)
   Any bleeding 10 (35.7)
   Plasma leakage: 28 (100.0)
Hematocrit change ≥20% 25 (89.3)
Pleural effusion or ascites 13 (46.4)
Hypoproteinemia 25 (89.3)
DSS: 8 (28.6)
   DHF, rapid pulse and narrow pulse pressure 5 (17.9)
Rapid pulse >100/minute 26 (92.9)
Narrow pulse pressure <20 mmHg 10 (35.7)
   DHF and hypotension 8 (28.6)
Hypotension <90 mmHg 21 (75.0)
  1. WHO = World Health Organization