TABLE 3.

Demographic and clinical data for cases and controls

Characteristic	Periodontitis cases (n = 5)	Healthy controls (n = 5)
Age (yr)a
Mean (SD)	48.20 (10.04)	47.20 (8.29)
Median	43	45
Range	39-63	40-61
No. of males/no. of females	2/3	2/3
Plaque indexb
Median	0.79	0.71
Range	0.71-1.00	0.54-0.96
Bleeding indexc
Median	0.50	0.04
Range	0.17-1.17	0.00-0.17
Probing depth for healthy sample sites (mm)d
Mean (SD)	2.52 (0.46)	2.70 (0.41)
Range	2.00-3.00	2.00-3.00
Probing depth for “diseased” sample sites (mm)
Mean (SD)	6.98 (0.61)	NAe
Range	6.00-9.00	NA

^aThe P value for age is 1.000.

^bThe P value for the plaque index is 0.402.

^cThe P value for the bleeding index is 0.015.

^dThe P value for the probing depth for healthy sample sites is 0.663.

^eNA, not applicable.