Table 1.

Surrogate Estimates of Insulin Resistance

Fasting glucose (mmol/L)

Fasting insulin (pmol/L)

HOMA-IR = fasting plasma insulin (μU/mL) · fasting plasma glucose (mmol/L)/22.5 (Matthews et al.13)

QUICKI = 1/[log(insulin0) + log(glucose0)] with insulin expressed in μU/mL and glucose in mg/dL (Katz et al.37)

Glucose/insulin ratio = fasting glucose (mg/dL)/insulin (μU/mL)

G-AUC = area under the curve of glucose during OGTT using trapezoidal method

I-AUC = area under the curve of insulin during OGTT using trapezoidal method

Belfiore index = 2/[({(0.5 · fasting PG) + OGTT 1-hour PG + (0.5 · OGTT 2- hour PG)}/11.36) · ({(0.5 · fasting PI) + OGTT 1-hour PI + (0.5 · OGTT 2- hour PI)}/638)+1] with plasma glucose (PG) expressed in mmol/L and plasma insulin (PI) expressed in pmol/L (Belfiore et al.38)

Stumvoll index = 0.222 – (0.00333 · BMI) – (0.0000779 · Ins 120 minutes) – (0.000422 · age) with insulin expressed in pmol/L (Stumvoll et al.39)