Table 1.
Characteristics of the study subjects.
| No—mild periodontitis (n = 340) | Moderate—severe periodontitis (n = 124) | ||||
|---|---|---|---|---|---|
| N (%) | pd | ||||
| Positive for saliva | Pg | 177 (52.1) | 79 (63.7) | 0.03 | |
| Tf | 215 (63.6) | 90 (72.6) | 0.07 | ||
| Pi | 75 (22.1) | 37 (29.8) | 0.08 | ||
| Aa | 35 (10.3) | 15 (12.1) | 0.58 | ||
| n of species | 0 | 81 (23.8) | 24 (19.4) | 0.07 | |
| 1 | 90 (26.5) | 22 (17.7) | |||
| 2 | 104 (30.6) | 42 (33.9) | |||
| 3 | 56 (16.5) | 29 (23.4) | |||
| 4 | 9 (2.6) | 7 (5.6) | |||
| Gender (men) | 210 (61.8) | 92 (74.2) | 0.01 | ||
| Smokers | Current | 27 (7.9) | 28 (22.6) | <0.001 | |
| Former | 127 (37.4) | 59 (47.6) | <0.001 | ||
| Diabetes | 69 (20.7) | 36 (29.0) | 0.06 | ||
| Antibiotic treatmenta | 136 (41.3) | 46 (38.7) | 0.66 | ||
| Periodontal treatmentb | 33 (10.3) | 22 (20.4) | 0.01 | ||
| MEDIAN (IQR) | pe | ||||
| Salivary concentration (GE/ml)c | Pg | 679 (21,300) | 31,500 (311,000) | <0.001 | |
| Tf | 33,100 (297,000) | 265,000 (1,280,000) | <0.001 | ||
| Pi | 4040 (70,900) | 55,900 (824,000) | <0.01 | ||
| Aa | 1100 (5780) | 539 (3510) | 0.43 | ||
| Sum of bacteria | 38,900 (372,000) | 518,000 (1,950,000) | <0.001 | ||
| Number of teeth and implants | 25.0 (7) | 21.0 (12) | <0.001 | ||
| MEAN (SD) | pf | ||||
| Age | 62.1 (9.6) | 65.3 (7.5) | <0.001 | ||
a
Self-reported intake of antibiotics during past 6 months;
b
Self-reported periodontal treatment in the past;
c
In pathogen-positive subjects;
d
Chi-squared test;
e
Mann-Whitney test;
f
t-test; Significant p-values are presented in bold face.