Predictors of severe hemolysis in patients with glucose-6-phosphate dehydrogenase deficiency following exposure to oxidant stresses.

Background And Objectives: Glucose-6-phosphate dehydrogenase (G6PD) deficiency is a genetic enzymatic disorder that affects millions of people worldwide, and is a major health problem in Jordan. We studied factors that may predict severe hemolysis in children with G6PD deficiency.

Methods: We reviewed the records of patients with low G6PD activity admitted to a teaching hospital be- tween 1996 to 2007. We collected demographic data, details of sign and symptoms, history and type of fava bean ingestion, blood and Rh group, history of neonatal jaundice, history and type of drug use, abdominal pain at admission and the results of tests for hemoglobin, white blood cells (WBC), and hepatic function. We classified patients into mild and severe groups based on hemoglobin levels at admission.

Results: Of 428 children with G6PD deficiency, 79 (18%) were severe cases and 349 (82%) patients with mild disease. There were no statistically significant differences in most factors between the two groups. Factors that achieved statistical significance for severe hemolysis included younger age (P<.05), male gender (P<.05), higher alkaline phosphatase (ALP) (P<.05), presence of fever at admission (P<.01), presence of vomiting during the at- tack (P=.006), and a negative family history for G6PD deficiency (P=.005).

Conclusions: Severe hemolysis can be predicted during hemolytic episodes in children with low G6PD by young age, male gender, a negative family history of G6PD deficiency, the presence of fever and vomiting and a high ALP.