Table 1.
Subject characteristics
| Male (n = 899) | Female (n = 612) | Total (n = 1501) | |
|---|---|---|---|
| Age (mean) | 57.7 ± 10.2 | 55.1 ± 9.6 | 56.7 ± 10.0 |
| 35 ~ 49 years old | 224 (25.2 %) | 200 (32.7 %) | 424 (28.2 %) |
| 50 ~ 59 years old | 255 (28.7 %) | 208 (34.0 %) | 463 (30.8 %) |
| 60 ~ 69 years old | 284 (31.9 %) | 158 (25.8 %) | 442 (29.5 %) |
| 70 ~ 89 years old | 126 (14.2 %) | 46 (7.5 %) | 172 (11.5 %) |
| Clinically-examined number of teeth | 26.5 ± 4.4 | 26.4 ± 4.1 | 26.5 ± 4.3 |
| Self-reported number of teeth | 24.8 ± 5.3 | 25.5 ± 4.8 | 25.1 ± 5.1 |
| Mean of tooth brushing per day | 1.9 ± 0.7 | 2.3 ± 0.7 | 2.1 ± 0.7 |
| Mean of interdental cleaning instrument use per week | 2.5 ± 4.9 | 3.3 ± 5.0 | 2.9 ± 4.9 |
| CPI | |||
| 0 | 54 (6.1 %) | 91 (14.9 %) | 145 (9.7 %) |
| 1,2 | 608 (68.4 %) | 439 (71.7 %) | 1047 (69.7 %) |
| 3,4 | 227 (25.5 %) | 79 (12.9 %) | 306 (20.4 %) |
| Not measurable | 0 | 3 (0.5 %) | 3 (0.2 %) |
| Recent visit to dental clinics | |||
| Yes | 89 (10.0 %) | 64 (10.5 %) | 153 (10.2 %) |
| No | 800 (90.0 %) | 548 (89.5 %) | 1348 (89.8 %) |
| Frequency of dental scaling visit | |||
| None | 453 (51.0 %) | 259 (42.3 %) | 712 (47.4 %) |
| Once or twice a year | 326 (36.7 %) | 265 (43.3 %) | 591 (39.4 %) |
| 3 ~ 5 times a year | 75 (8.4 %) | 72 (11.8 %) | 147 (9.8 %) |
| 6 or more times a year | 35 (3.9 %) | 16 (2.6 %) | 51 (3.4 %) |
CPI community periodontal index