Table 3.

Linear regression model between blood urea, sex, age and duration of hemodialysis (as dependent variable) and different periodontal parameters (as independent variable)

Outcome	Regression coefficient	Beta (95% CI) for regression coefficient		p value
		Lower	Upper
Age	0.70	0.21	1.19	< 0.001*
Sex	− 11.35	− 20.30	− 2.93	0.013*
Mean probing depth (mm)	2.18	− 3.78	8.14	0.471 ns
Plaque %	0.59	0.14	1.04	0.010*
BOP %	0.73	0.43	1.04	< 0.001*
Mean CAL (mm)	4.36	2.30	6.42	< 0.001*
Number of teeth	3.34	1.95	4.73	< 0.001*
% of sites with CAL ≥ 4 mm	0.45	0.26	0.64	< 0.001*
% of sites with PD ≥ 3 mm	0.49	0.28	0.70	< 0.001*
Duration of hemodialysis	0.06	− 0.63	0.75	0.862 ns

CI confidence interval