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 | 
The P value for age is 1.000.
The P value for the plaque index is 0.402.
The P value for the bleeding index is 0.015.
The P value for the probing depth for healthy sample sites is 0.663.
NA, not applicable.