Table 2.
Comparison of each variable by frequency of dental check-ups
| Frequency of dental check-up | |||||||
| Irregular | Subregular | Regular | P value* | ||||
| Mean | SD | Mean | SD | Mean | SD | ||
| Overall | n=1017 | n=877 | n=797 | ||||
| Sex, men, n, % | 806 | 79.3 | 668 | 76.2 | 625 | 78.4 | 0.256 |
| Age, year | 39.1 | 8.7 | 38.0 | 7.5 | 38.0 | 7.6 | 0.002 |
| Type of occupation, n, % | |||||||
| Clerical | 243 | 23.9 | 312 | 35.6 | 344 | 43.2 | <0.001 |
| Sales | 165 | 16.2 | 195 | 22.2 | 135 | 16.9 | |
| Research | 78 | 7.7 | 118 | 13.5 | 126 | 15.8 | |
| Manufacturing | 561 | 52.2 | 252 | 28.7 | 192 | 24.1 | |
| Dental CF, JPY | 15 719 | 9399 | 30 612 | 1839 | 34 515 | 0 | <0.001 |
| CDEs, JPY | 236 663 | 202 118 | 207 742 | 198 987 | 197 527 | 185 427 | <0.001 |
| CDEs and dental CF, JPY | 241 104 | 204 466 | 214 122 | 220 218 | 202 281 | 190 324 | <0.001 |
| CMEs, JPY | 320 741 | 889 423 | 265 844 | 768 248 | 261 605 | 935 216 | 0.023 |
| Younger adults | n=515 | n=536 | n=477 | ||||
| Sex, men, n, % | 386 | 75.0 | 383 | 71.5 | 354 | 74.2 | 0.400 |
| Age, year | 31.8 | 4.6 | 33.1 | 4.4 | 32.9 | 4.6 | <0.001 |
| Type of occupation, n, % | |||||||
| Clerical | 110 | 21.4 | 179 | 33.4 | 187 | 39.2 | <0.001 |
| Sales | 72 | 14.0 | 124 | 23.1 | 92 | 19.3 | |
| Research | 44 | 8.5 | 90 | 16.8 | 84 | 17.6 | |
| Manufacturing | 289 | 56.1 | 143 | 26.7 | 114 | 23.9 | |
| Dental CF, JPY | 16 286 | 9101 | 30 597 | 1871 | 34 515 | 0 | <0.001 |
| CDEs, JPY | 201 045 | 173 377 | 178 318 | 189 497 | 177 780 | 157 341 | 0.013 |
| CDEs and dental CF, JPY | 206 925 | 179 251 | 183 111 | 191 786 | 180 974 | 158 222 | 0.014 |
| CMEs, JPY | 231 638 | 676 227 | 174 732 | 601 841 | 184 406 | 484 966 | 0.017 |
| Middle-aged adults | n=502 | n=341 | n=320 | ||||
| Sex, men, n, % | 420 | 83.7 | 285 | 83.6 | 271 | 84.7 | 0.908 |
| Age, year | 46.6 | 4.4 | 45.7 | 4.4 | 45.5 | 4.3 | <0.001 |
| Type of occupation, n, % | |||||||
| Clerical | 133 | 26.5 | 133 | 39.0 | 157 | 49.1 | <0.001 |
| Sales | 93 | 18.5 | 71 | 20.8 | 43 | 13.4 | |
| Research | 34 | 6.8 | 28 | 8.2 | 42 | 13.1 | |
| Manufacturing | 242 | 48.2 | 109 | 32.0 | 78 | 24.4 | |
| Dental CF, JPY | 15 131 | 9670 | 30 637 | 1791 | 34 515 | 0 | <0.001 |
| CDEs, JPY | 273 204 | 222 180 | 253 992 | 204 947 | 226 962 | 217 723 | <0.001 |
| CDEs and dental CF, JPY | 276 167 | 222 222 | 262 868 | 251 340 | 234 041 | 226 587 | <0.001 |
| CMEs, JPY | 412 151 | 1 057 625 | 409 058 | 957 620 | 376 680 | 1 345 110 | 0.043 |
¥100≈US$1. Dental CF, CDEs and CMEs were used for a pooled 12-year period. Younger adults: 20–39 years, middle-aged adults: 40–59 years. Regular: once per year, subregular: at least once per 2 years, irregular: others
*Using the χ2 test, analysis of variance and Kruskal‐Wallis test.
CDEs, cumulative dental expenditures; CF, check-up fee; CMEs, cumulative medical expenditures.