Table 6. Statistical Correlation between Serum Creatinine and Mean Parenchymal Thickness, Mean Longitudinal Size, Mean Cortical Thickness and Echogenicity grade.

** Correlation is significant at the 0.01 level (2-tailed).

		Parenchymal Thickness	Longitudinal Length	Cortical Thickness	Echogenicity Grade
Serum creatinine (mg/dl)	Pearson correlation	0.413**	-0.505**	-0.845**	0.915**
	P-Value	0.0005	0.0005	0.0005	0.0005
Parenchymal thickness	Pearson correlation		0.092	-0.240**	0.336**
	P-Value		0.194	0.001	0.005
Longitudinal length	Pearson correlation			0.634**	-0.513**
	P-Value			0.0005	0.0005
Cortical thickness	Pearson correlation				-0.869**
	P-Value				0.0005