Table 6.

The Coefficients and Constant of Predictive Formula Based on Stepwise Multiple Regression Analysis

Step	R	R²	Adjusted R²	Independent Variables
1	0.814	0.663	0.653	Formate
2	0.840	0.706	0.689	Formate, HbA1c

Abbreviations: R, correlation coefficient; R², coefficient of determination.