Table 1.
Characteristics of patients with chronic periodontitis (CP) and controls.
| CP patients | Controls | P | OR (95% CI) | |
| n (%) | n (%) | |||
|
| ||||
| N = 140 | N = 173 | |||
|
| ||||
| Gender | ||||
| Male | 66 (47) | 56 (32) | ||
| Female | 74 (53) | 117 (68) | ||
| Age | ||||
| Mean ± SD (year) | 47.03 ± 9.21 | 45.61 ± 9.18 | ||
| Ethnic origin | ||||
| Caucasian | 84 (60) | 118 (68) | ||
| Mixed | 36 (26) | 40 (23) | ||
| Black | 18 (13) | 15 (9) | ||
| Not declared | 2 (1) | 0 | ||
| Smoking | ||||
| Nonsmokers | 56 (40) | 127 (73) | <0.001 | 0.24 (0.149–0.39) |
| Smokers | 33 (24) | 20 (12) | 0.008 | 2.78 (1.33–5.78) |
| Ex-smokers | 51 (36) | 26 (15) | <0.001 | 3.24 (1.89–5.56) |
|
| ||||
| Nonsmoker | N = 56 | N = 127 | ||
|
| ||||
| Gender | ||||
| Male | 20 (35.7) | 33 (26.0) | ||
| Female | 36 (64.28) | 94 (74.0) | ||
| Age | ||||
| Mean ± SD (year) | 46.5 ± 9.3 | 45.5 ± 9.9 | ||
| Ethnic origin | ||||
| Caucasian | 36 (64.28) | 86 (67.7) | ||
| Mixed | 16 (28.6) | 28 (22.0) | ||
| Black | 3 (5.4) | 13 (10.3) | ||
| Not declared | 1 (1.8) | 0 | ||
n: number; P = P value; OR: odds ratio; CI: confidence interval.