Five hundred members belonging to the Bania community of Punjab were screened 
for erythrocytic glucose-6-phosphate dehydrogenase (G-6-PD) deficiency. The 
incidence of enzyme deficiency in males was 2.84 per cent and in females 2.75 
per cent, with an overall incidence of 2.80 per cent. No correlation between age 
and G-6-PD deficiency was found. The mean values for haemoglobin and haematocrit 
did not differ significantly in the normal and deficient subjects. Study of the 
deficiency pattern amongst family members of the enzyme deficient subjects 
confirmed the X-linked inheritance of G-6-PD deficiency.