Table 5. Correlation of obesity with PPD (probing pocket depth) (in mm) and CAL (clinical attachment levels) (in mm) in smokers and non-smokers and healthy subjects .

Obesity	PPD (mean ± SD ‡ )
	Smokers	Non-smokers	Healthy	P-value
Non-obese	5.13 ± 0.46	1.33 ± 0.23	<0.0001*
Obese	5.78 ± 0.30	4.92± 0.20	1.69 ± 0.23	<0.0001*
	CAL (mean ± SD‡)
	Smokers	Non-smokers	Healthy	P-value
Non-obese	5.46 ± 0.43	4.70 ± 0.26	-	<0.0001*
Obese	6.13 ± 0.38	5.21 ± 0.35	-	<0.0001*

^*highly significant

^‡SD = Standard deviation