Table 2.
Demographic characteristics of the study subjects.
| Cases | Controls | X 2 | p value | |
|---|---|---|---|---|
| (n = 200) | (n = 200) | |||
| Mean age | 12.20 ± 0.40 | 12.24 ± 0.30 | ||
| Gender (%) | 0.640 | 0.424 | ||
| Female | 98 (49) | 106 (53) | ||
| Male | 102 (51) | 94 (47) | ||
| BOP (+) | 28 (14.0) | 23 (11.5) | 0.562 | 0.454 |
| VM-value (+) | 41 (20.5) | 36 (18.0) | 0.402 | 0.526 |
| Brushing time | ||||
| <3 min | 171 (85.5) | 165 (82.5) | 0.700 | 0.413 |
| ≥3 min | 29 (14.5) | 35 (17.5) | ||
| Brushing frequency | ||||
| <2 times a day | 95 (47.5) | 91 (45.5) | 0.161 | 0.688 |
| ≥2 times a day | 105 (52.5) | 109 (54.5) |
Note. BOP: bleeding on probing; VM-value: Volpe Manhold Index scores.