tonia bird

Hello everybody, In my research ,I used the Homeostastic Model Assessment (HOMA) to calculate the Insulin Sensitivity/Resistance and beta cell function.And I used the original equation in calculation , but when I used the computer model (HOMA calculator) I got different results ! for example: for glucose= 75 mg/dl and Insulin= 4.24 microIU/L BY ORIGINAL equation , HOMA beta =16.85 and HOMA IR =0.79 But by HOMA calculator, HOMA beta =92.4 and HOMA IR =0.53 If anyone have an explanation for this ,or used the HOMA in his/her research I will be grateful Best regards