Table 4.
Sensitivity analysis of 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=2586) | ||||||||||
| CDEs and dental CF, JYP | ||||||||||
| Irregular | 912 | 240 461 | 203 601 | <0.001 | Ref. | |||||
| Subregular | 877 | 214 122 | 220 218 | 0.89 | 0.83 to 0.96 | 0.001 | 0.93 | 0.87 to 0.99 | 0.046 | |
| Regular | 797 | 202 281 | 190 324 | 0.84 | 0.78 to 0.91 | <0.001 | 0.89 | 0.83 to 0.96 | 0.003 | |
| CMEs, JPY | ||||||||||
| Irregular | 912 | 929 481 | 1 563 702 | 0.731 | Ref. | |||||
| Subregular | 877 | 905 054 | 1 270 342 | 0.97 | 0.90 to 1.06 | 0.537 | 0.97 | 0.89 to 1.05 | 0.967 | |
| Regular | 797 | 907 259 | 1 487 887 | 0.98 | 0.90 to 1.07 | 0.585 | 0.99 | 0.91 to 1.08 | 0.989 | |
| Younger adults (n=1488) | ||||||||||
| CDEs and dental CF, JPY | ||||||||||
| Irregular | 475 | 205 917 | 176 061 | 0.014 | Ref. | |||||
| Subregular | 536 | 183 111 | 191 786 | 0.89 | 0.81 to 0.98 | 0.016 | 0.88 | 0.80 to 0.97 | 0.009 | |
| Regular | 477 | 180 974 | 158 222 | 0.88 | 0.80 to 0.97 | 0.010 | 0.87 | 0.79 to 0.96 | 0.006 | |
| CMEs, JPY | ||||||||||
| Irregular | 475 | 717 706 | 1 169 612 | 0.765 | Ref. | |||||
| Subregular | 536 | 650 923 | 1 018 878 | 0.91 | 0.89 to 1.05 | 0.087 | 0.85 | 0.76 to 0.95 | 0.005 | |
| Regular | 477 | 700 535 | 1 024 149 | 0.98 | 0.81 to 1.01 | 0.677 | 0.95 | 0.85 to 1.06 | 0.365 | |
| Middle-aged adults (n=1098) | ||||||||||
| CDEs and dental CF, JPY | ||||||||||
| Irregular | 437 | 278 009 | 224 058 | <0.001 | Ref. | |||||
| Subregular | 341 | 262 868 | 251 340 | 0.95 | 0.86 to 1.05 | 0.352 | 1.00 | 0.90 to 1.11 | 0.983 | |
| Regular | 320 | 234 041 | 226 587 | 0.84 | 0.75 to 0.94 | 0.002 | 0.92 | 0.82 to 1.02 | 0.122 | |
| CMEs, JPY | ||||||||||
| Irregular | 437 | 1 159 672 | 1 876 128 | 0.004 | Ref. | |||||
| Subregular | 341 | 1 304 509 | 1 504 154 | 1.13 | 0.99 to 1.28 | 0.066 | 1.08 | 0.95 to 1.22 | 0.255 | |
| Regular | 320 | 1 215 408 | 1 949 321 | 1.05 | 0.92 to 1.19 | 0.476 | 1.00 | 0.88 to 1.13 | 0.953 | |
¥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 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, decayed teeth, missing teeth, CPI and total MEs in 2002.
aOR, adjusted OR; CDEs, cumulative dental expenditures; CF, check-up fee; CMEs, cumulative medical expenditures; cOR, crude OR; CPI, Community Periodontal Index.