Table 6. Measuring both the correlation and the regression considering the cholesterol as the independent variable and the glucose as the dependant one.

	All the 438 individuals	Cholesterol is normal<201 mg/dl	Cholesterol is 201-239: mg/dl	Cholesterol is >239 mg/dl
Correlation	0.35	0.4	0.4	0.28
Regression P (slope)	0.19	0.28	0.116	0.27
S y.x (Standard error of estimate)	45.06	71.35	32.01	56.91
Sb (Estimated standard error value	10.48	10.17	3.2	7.0
TR (The test ratio)	0.018	0.028	0.036	0.038