Table 4.

Stratified analysis demonstrating the covariates associated with periodontal disease and coronary artery disease.

					Association between PD and CAD
		N	PD risk factor	CAD		PD risk factor	CAD
Risk factor			Yes	Yes	%	No	Yes	%	P value∗
Area of living	Rural	725	445	19	4.3	280	4	1.4	.034
	Urban	560	199	15	7.5	361	22	6.1	.510
Socio-economic	No	540	193	13	6.7	347	22	6.3	.858
class-BPL (Urban)	Yes	20	6	2	33.3	14	0	0.0	.023

All results were presented as numbers or percentages.

BPL = below poverty line, CAD = coronary artery disease, PD = periodontal disease.