Development and validation of dietary and lifestyle insulinemic indices among Iranian adult population

Nutrition & Metabolism

Table 1 Dietary and lifestyle components of the developed indices; the Third examination of Tehran Lipid and Glucose Study (2006–2008)

DIH			DIR			LIH			LIR
Components	Weight^†	R^{2 ‡}	Components	Weight^†	R^{2 ‡}	Components	Weight^†	R^{2 ‡}	Components	Weight^†	R^{2 ‡}
Directly related food groups			Directly related food groups			Directly related food groups			Directly related food groups
Refined grains	0.105	0.010	Pickles	0.085	0.008	BMI (kg/m²)	0.482	0.229	BMI (kg/m²)	0.487	0.232
Pickles	0.089	0.007	Refined grains	0.079	0.008	Refined grains	0.091	0.013	Refined grain	0.077	0.011
Doogh	0.082	0.006	Doogh	0.066	0.003	Doogh	0.076	0.005	Doogh	0.061	0.004
Sweetened beverages	0.062	0.005	Lemon juice	0.063	0.003	Fish	0.044	0.003
Fish	0.061	0.003	Sweetened beverages	0.059	0.005
Lemon juice	0.061	0.003	Fish	0.056	0.003
Inversely related food groups			Inversely related food groups			Inversely related food groups			Inversely related food groups
Broth	− 0.059	0.004	Starchy vegetables	− 0.054	0.003	Low fat dairy	− 0.051	0.002	Low fat dairy	− 0.063	0.003
Red meat	− 0.059	0.004	Snacks	− 0.055	0.003	Physical activity (MET-h/wk.)	− 0.064	0.004	Physical activity (MET-h/wk.)	− 0.064	0.004
High fat dairy	− 0.063	0.003	Low fat dairy	− 0.061	0.002	High fat dairy	− 0.067	0.004	Starchy vegetables	− 0.065	0.004
Starchy vegetables	− 0.068	0.004	Broth	− 0.061	0.004	Starchy vegetables	− 0.084	0.006	High fat dairy	− 0.069	0.003
			Red meat	− 0.067	0.004
			High fat dairy	− 0.073	0.003

The items of each food group are defined in detail in Additional file 1: Table S1
^†β-regression coefficients were obtained from the last step of stepwise linear regression models, indicating the contribution of each component to the total index score
^‡The coefficient of determination shows the explained variance in biomarkers by each component

ISSN: 1743-7075