Table 1.
Summary of the characteristics of the study population.
| Parameter† | Control n = 18 | Periodontitis n = 19 |
|---|---|---|
| Age | 40·8 ± 10·1 | 42·0 ± 9·9 |
| Gender | ||
| Male | 6 (33%) | 7 (37%) |
| Female | 12 (67%) | 12 (63%) |
| Ethnicity | ||
| Non-Caucasian | 4 (22%) | 4 (21%) |
| Caucasian | 14 (78%) | 15 (79%) |
| Smoking | ||
| Non-smoker | 13 (72%) | 13 (68%) |
| Smoker | 5 (28%) | 6 (32%) |
| C-reactive protein (mg/l) | 2·2 ± 3·9 | 3·6 ± 5·1 |
| Leukocytes (×109/l) | 5·8 ± 1·6 | 6·5 ± 2·1 |
| Neutrophils (×109/l) | 3·3 ± 1·1 | 3·8 ± 1·5 |
| Monocytes (×109/l) | 0·4 ± 0·1 | 0·5 ± 0·2 |
| Lymphocytes (×109/l) | 2·0 ± 0·6 | 2·1 ± 0·5 |
| Subgingival colonization* | ||
| Aa-Pg- | 14 (78%) | 4 (21%) |
| Aa+Pg- | 3 (17%) | 6 (32%) |
| Aa-Pg+ | 1 (5%) | 6 (32%) |
| Aa+Pg+ | 0 | 3 (15%) |
| Number of teeth | ||
| Total | 28·7 ± 1·6 | 27·2 ± 2·5 |
| With bone loss | ||
| ≥ 30% | 0 | 17·1 ± 5·1 |
| ≥ 50% | 0 | 6·7 ± 4·2 |
*
P = 0·004 (χ2-test).
†
Values are means ± standard deviations or numbers (%) of subjects. Aa, A. actinomycetemcomitans; Pg, P. gingivalis.