To calculate disposition index use the formula as given below

Beta Cell function was measured by the oral disposition index (DIo):

DIo = (DI 0–30/DG 0–30) · (1/fasting insulin).[Ref.1,2]

1.Bacha F, Gungor N, Arslanian SA: Measures of beta-cell

function during the oral glucose tolerance test, liquid mixedmeal

test, and hyperglycemic clamp test. J Pediatr 2008;152:

618–621.

2.Utzschneider KM, Prigeon RL, Faulenbach MV, Tong J, Carr

DB, Boyko EJ, Leonetti DL, McNeely MJ, Fujimoto WY,

Kahn SE: Oral disposition index predicts the development of

future diabetes above and beyond fasting and 2-h glucose

levels. Diabetes Care 2009;32:335–341.

I hope this is useful.

Thank you, mam. The firsts reference is very useful and will get back if I encounter any difficulties. Thank you