| Parameter | Normal glucose tolerance (Mean S.D) (n=92) | Abnormal glucose tolerance  (Mean ± S.D) (n=8) | Significance | 
   
  | Fasting serum glucose (mg/dL) | 76.78 ± 9.88 | 107.25 ± 13.59 | < 0.001* | 
   
  | Post  serum glucose (mg/dL) | 102.22 ± 24.43 | 147 ±  4.76 | < 0.001* | 
   
  | Serum iron (μg/dL) | 111.35 ± 53.08 | 264 ± 33.8 | < 0.001* | 
   
  | Serum phosphorous (mg/dL) | 3.367 ± 0.58 | 3.82 ± 0.63 | Not significant | 
   
  | Hemoglobin (Gm%) | 9.776 ± 1.41 | 9.925 ± 1.58 | Not significant |