Table 2. Comparison of Serum Creatinine with Renal Cortical Echogenicity .

Echogenicity Grades [Grading based on ultrasound features]	Serum Creatinine (mg/dl)
	No. of Patients	Mean	SD	95% Confidence Interval for Mean		F Value	P-Value
				Lower Bound	Upper Bound
Grade 0	60	1.252	0.050	1.239	1.265	367.726	0.0005
Grade 1	60	1.853	0.129	1.820	1.887
Grade 2	44	2.568	0.651	2.370	2.766
Grade 3	24	3.275	0.352	3.126	3.424
Grade 4	12	5.033	0.528	4.698	5.369
Total	200	2.191	1.0431	2.046	2.337