Diagnosis | Total | Age (mean years ± SD) | Male (%) | Smokers (%) | Probing depth (mm) (mean ± SD) | Recession (mean ± SD) | Clinical attachment level (mm) (mean ± SD) | Bleeding on probing (%) |
---|---|---|---|---|---|---|---|---|

Periodontal health |
50 | 46 ± 8 | 52 (a) |
24 | 1.54 ± 0.2 (a) |
0.04 ± 0.06 (a) | 1.38 ± 0.24 (a) | 6% ± 5% (a, b) |

Gingivitis | 52 | 49 ± 9 | 42 (b) |
35 | 1.89 ± 0.3 (b) |
0.06 ± 0.16 (b) | 1.61 ± 0.4 (b) |
34% ± 15% (a) |

Chronic periodontitis |
52 | 50 ± 10 | 79 (a, b) |
38 | 3.05 ± 0.6 (a, b) |
0.31 ± 0.42 (a, b) | 2.81 ± 0.6 (a, b) |
32% ± 21% (b) |

Statistically significant differences between groups are indicated by the same letter (Kruskal Wallis test and z-test with Bonferroni corrections, *P* < 0.05)