Table 3.
Relationship among cumulative dental expenditures, added dental check-up fees and cumulative medical expenditures in a 12-year period
| N | Mean | SD | P value* | Crude OR | 95% CI | P value† | Adjusted OR | 95% CI | P value‡ | |
| Overall (n=2691) | ||||||||||
| CDEs and dental CF, JPY | ||||||||||
| Irregular | 1017 | 241 103 | 204 466 | <0.001 | Ref. | |||||
| Subregular | 877 | 214 122 | 220 218 | 0.89 | 0.83 to 0.95 | <0.001 | 0.91 | 0.85 to 0.98 | 0.008 | |
| Regular | 797 | 202 281 | 190 324 | 0.84 | 0.78 to 0.90 | <0.001 | 0.87 | 0.81 to 0.93 | <0.001 | |
| CMEs, JPY | ||||||||||
| Irregular | 1017 | 937 854 | 1 541 429 | 0.749 | Ref. | |||||
| Subregular | 877 | 905 053 | 1 270 342 | 0.97 | 0.89 to 1.05 | 0.398 | 0.96 | 0.89 to 1.04 | 0.335 | |
| Regular | 797 | 907 259 | 1 487 887 | 0.97 | 0.89 to 1.05 | 0.443 | 0.96 | 0.88 to 1.04 | 0.280 | |
| Younger adults (n=1528) | ||||||||||
| CDEs and dental CF, JPY | ||||||||||
| Irregular | 515 | 206 925 | 179 252 | 0.014 | Ref. | |||||
| Subregular | 536 | 183 111 | 191 786 | 0.89 | 0.81 to 0.97 | 0.010 | 0.86 | 0.78 to 0.95 | 0.002 | |
| Regular | 477 | 180 974 | 158 222 | 0.88 | 0.79 to 0.96 | 0.007 | 0.86 | 0.78 to 0.95 | 0.003 | |
| CMEs, JPY | ||||||||||
| Irregular | 515 | 695 888 | 1 131 985 | 0.685 | Ref. | |||||
| Subregular | 536 | 650 923 | 1 018 878 | 0.94 | 0.84 to 1.04 | 0.232 | 0.85 | 0.76 to 0.94 | 0.003 | |
| Regular | 477 | 700 535 | 1 024 149 | 1.01 | 0.90 to 1.13 | 0.907 | 0.94 | 0.84 to 1.05 | 0.237 | |
| Middle-aged adults (n=1163) | ||||||||||
| CDEs and dental CF, JPY | ||||||||||
| Irregular | 502 | 276 167 | 222 223 | <0.001 | Ref. | |||||
| Subregular | 341 | 262 868 | 251 340 | 0.95 | 0.86 to 1.06 | 0.352 | 0.98 | 0.88 to 1.09 | 0.682 | |
| Regular | 320 | 234 041 | 226 587 | 0.85 | 0.76 to 0.94 | 0.003 | 0.88 | 0.79 to 0.98 | 0.023 | |
| CMEs, JPY | ||||||||||
| Irregular | 502 | 1 186 085 | 1 838 978 | 0.008 | Ref. | |||||
| Subregular | 341 | 1 304 509 | 1 504 154 | 1.10 | 0.97 to 1.24 | 0.126 | 1.08 | 0.96 to 1.22 | 0.196 | |
| Regular | 320 | 1 215 408 | 1 949 321 | 1.03 | 0.90 to 1.16 | 0.703 | 0.96 | 0.85 to 1.09 | 0.542 |
¥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 Kruskal‐Wallis test.
†cOR and 95% CI were calculated by generalised linear model with a Tweedie distribution of log link.
‡aOR and 95% CI were calculated by generalised linear model with a Tweedie distribution of log link after adjustment for sex, age, type of occupation and CMEs in 2002.
aOR, adjusted OR; CDEs, cumulative dental expenditures; CF, check-up fee; CMEs, cumulative medical expenditures; cOR, crude OR.