Table 4.
Comparison of self-reported and clinically-examined numbers of teeth by oral condition and oral hygiene
| Male (n = 889) | Female (n = 612) | |||||
|---|---|---|---|---|---|---|
| n | ρ a | p-value | n | ρ a | p-value | |
| Oral condition | ||||||
| Clinically-examined number of teeth | ||||||
| 0 ~ 19 | 70 | 0.72 | <0.01 | 31 | 0.65 | <0.01 |
| 20 ~ 32 | 819 | 0.63 | <0.01 | 581 | 0.64 | <0.01 |
| CPI | ||||||
| 0 | 54 | 0.62 | <0.01 | 91 | 0.62 | <0.01 |
| 1,2 | 608 | 0.68 | <0.01 | 439 | 0.65 | <0.01 |
| 3,4 | 227 | 0.78 | <0.01 | 79 | 0.75 | <0.01 |
| Oral hygiene | ||||||
| Frequency of tooth brushing | ||||||
| Once a day | 249 | 0.71 | <0.01 | 55 | 0.69 | <0.01 |
| Twice a day | 480 | 0.69 | <0.01 | 312 | 0.69 | <0.01 |
| 3 or more times a day | 160 | 0.74 | <0.01 | 245 | 0.65 | <0.01 |
| Frequency of dental scaling visit | ||||||
| None | 453 | 0.69 | <0.01 | 259 | 0.74 | <0.01 |
| Once or twice a year | 326 | 0.66 | <0.01 | 265 | 0.58 | <0.01 |
| 3 or more times a year | 110 | 0.80 | <0.01 | 88 | 0.65 | <0.01 |
aSpearman’s rank correlation coefficient
CPI community periodontal index