Red Cell Reference Laboratory

Direct Antiglobulin Test (DAT)

  Warm AIHA Cold AIHA PCH* Drug-Induced
IgG Only 67% 1% 0 94%
IgG + C3 24% 1% 0 6%
C3 Only 7% 91% 94% 0
DAT-negative 1% 6% 6% 0

*PCH = Paroxysmal Cold Hemoglobinuria

Sokol, R.j., et al. Br Med J 282:2023, 1981.

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