[Table/Fig-1]:

Comparison of mean and standard deviation of serum and salivary urea values in study groups.

Groups	Urea (mg/dl)				Mann Whitney U test value	p-value
	Serum Urea		Salivary Urea
	Mean ± SD	Median	Mean ± SD	Median
Chronic Kidney Disease (n=30)	112.66 ± 43.52	107.90	46.17 ± 11.41	43.11	16.000	p=0.000 (<0.001) Significant difference
Diabetes (n=30)	55.13 ± 19.42	48.44	32.80 ± 9.59	31.71	101.000	p=0.000 (<0.001) Significant difference
Hypertension (n=30)	43.41 ± 8.00	42.70	26.16 ± 7.18	27.80	48.000	p=0.000 (<0.001) Significant difference
Controls (n=30)	26.74 ± 3.91	27.50	12.59 ± 0.66	12.17	465.000	p=0.000 (<0.001) Significant difference