Table 2.

Methods used to calculate insulin resistance.

Method	Parameters	Formula	Cut-off values (range)	Studies using the method
HOMA-IR	FPG, FPI	(FPG (mmol/L) ∗ FPI (mU/L))/22.5	2.1–4.0	[14–27]
FPI	FPI	NA	9.85–23.7 μU/mL	[17, 19, 20, 28–31]
QUICKI	FPG, FPI	1/[log⁡(FPI (mU/L)) + log⁡(FPG (mg/dL))]	0.33–0.35	[17, 23]
FGIR	FPG, FPI	(FPG [mg/dL]/FPI [mU/L])	7	[23]
HOMA2	FPG, FPI	Computer model: HOMA2-calculator: http://www.dtu.ox.ac.uk/homa	2	[28]
McAuley index	FPI, triglycerides	(2.63 − 0.28 ln⁡[FPI]  − 0.31 ln⁡[fasting triglycerides])	6.3	[28]

FPG: fasted plasma glucose; FPI: fasted plasma insulin; FGIR: fasted glucose insulin ratio; HOMA-IR: homeostasis model assessment (for insulin resistance); QUICKI: Quantitative Insulin Sensitivity Check Index.