Table 2.

Serum and salivary creatinine and urea levels in the CKD and control groups.

	Group	n	Mean	SD	t	p
Serum urea (mg/dL)	CKD	35	40.6286	25.01421	4.652	.000*
	Control	28	9.2857	2.23361
Serum creatinine (mg/dL)	CKD	35	4.1409	4.28249	2.989	.004*
	Control	28	0.6971	0.15504
Salivary urea (mg/dL)	CKD	35	28.8286	15.75452	1.516	.136
	Control	28	21.7857	11.44336
Salivary creatinine (mg/dL)	CKD	35	0.4489	0.57186	2.208	.042*
	Control	28	0.1114	0.13114

^*Statistically significant.