Table 1. Basic Characteristics of Patients With Chronic Kidney Disease ^{a, b}.

	Group I (Mild) (n = 15)	Group II (Moderate) (n = 15)	Group III (Severe) (n = 15)	P value
Age	50.80 ± 8.35	56.80 ± 8.72	55.52 ± 14.95	0.45
Sex (male to female ratio)	8:7	7:8	9:6	0.87
Plasma Cr, mg/dL	1.58 ± 0.13	2.34 ± 0.25	3.31 ± 2.33	0.001
Cr clearance, mL/min	76.40 ± 3.92	43.40 ± 4.78	21.10 ± 5.5	0.001

^a Data are presented as mean ± SD.

^b Abbreviation: Cr, Creatinine.