Table 2.
Demographic characteristics and mean (± SD) full-mouth probing depth (PD) and clinical attachment level (CAL) of subjects in each center
| Variables | Experimental groups | |||||
|---|---|---|---|---|---|---|
|
| ||||||
| Periodontitis
|
Periodontal health
|
|||||
| Forsyth Institute n= 594 |
Guarulhos University n= 490 |
p-value | Forsyth Institute n= 193 |
Guarulhos University n= 53 |
p-value | |
| Age (years) | 49.6 ± 11.6 | 44.8 ± 12.0 | 0.000 | 37.8 ± 9.8 | 37.3 ± 15.8 | 0.756 |
| Gender (% of Male) | 54% | 40% | 0.126 | 37% | 45% | 0.091 |
| Smokers (%) | 29% | 20% | 0.056 | 12% | 0% | 0.000 |
| PD baseline (mm) | 3.4 ± 0.8 | 3.9 ± 0.7 | 0.000 | 2.5 ± 0.3 | 2.8 ± 0.1 | 0.000 |
| CAL baseline (mm) | 3.5 ± 1.1 | 4.4 ± 0.9 | 0.000 | 2.2 ± 0.7 | 2.5 ± 0.1 | 0.000 |
The significance of differences between the two databases was assessed using the Student T test. SD, standard deviation