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Table 4 G6PD status after cryopreservation as determined by two qualitative tests compared to status pre-cryopreservation

From: Cryopreservation of glucose-6-phosphate dehydrogenase activity inside red blood cells: developing a specimen repository in support of development and evaluation of glucose-6-phosphate dehydrogenase deficiency tests

BinaxNOW G6PD deficiency test Post-cryopreservation results   
  Normal Deficient Total  
Fresh specimen results Normal 8 0 8  
  Deficient 0 13 13
  Total 8 13 21
Fluorescent spot test Post-cryopreservation results
  Normal Intermediate Deficient Total
Fresh specimen results Normal 7 1 0 8
  Intermediate 0 0 5* 5
  Deficient 0 0 8 8
  Total 7 1 13 21
  1. * The five specimens initially characterized as intermediate by the fluorescent spot test were G6PD deficient by the quantitative test.