Table I.

Mean and standard deviation and average of extent, severity, and bleeding indexes during probing

	Case group				Control group			p-value
	Mean	Std	Median		Mean	Std	Median
Extent index	21.5	15.5	18.3		6.8	8.95	2.50	0.0001*
Severity index	1.1	0.21	1.0		0.73	0.59	1.0	0.0001*
Bleeding index	13.4	9.9	10.7		6.05	8.9	3.4	0.0001*
Mean probing depth	2.99	1.21	2.78		2.11	0.42	2.09	0.0001*
Probing depth >3 mm (%)	10.75	10.19	9.1		2.6	4.4	0	0.0001*

^* Mann-Whitney test.