| Region | Diet Habit | N of Tooth | N of DMFT | % of DMFT out of Total | % of DMFT within Region | Amount of Decrease Rate |
| West | Carbohydrate RF* | 952 | 199 | 16.6 | 95.2 | 19.8 |
| Protein and fiber RF | 56 | 10 | 0.8 | 4.8 | ||
| Total | 1008 | 209 | 17.4 | 100 | ||
| East | Carbohydrate RF | 392 | 77 | 6.4 | 85.6 | 5.9 |
| Protein and fiber RF | 84 | 13 | 1.1 | 14.4 | ||
| Total | 476 | 90 | 7.5 | 100 | ||
| North | Carbohydrate RF | 952 | 214 | 17.8 | 84.3 | 5.4 |
| Protein and fiber RF | 140 | 40 | 3.3 | 15.7 | ||
| Total | 1092 | 254 | 21.1 | 100 | ||
| South | Carbohydrate RF | 868 | 178 | 14.8 | 96.7 | 29.3 |
| Protein and fiber RF | 56 | 6 | 0.5 | 3.3 | ||
| Total | 924 | 184 | 15.3 | 100 | ||
| Center | Carbohydrate RF | 1988 | 420 | 35.0 | 90.5 | 9.5 |
| Protein and fiber RF | 168 | 44 | 3.7 | 9.5 | ||
| Total | 2156 | 464 | 38.6 | 100 | ||
| Total | Carbohydrate RF | 5152 | 1088 | 90.6 | 90.6 | 9.6 |
| Protein and fiber RF | 504 | 113 | 9.4 | 9.4 | ||
| Total | 5656 | 1201 | 100.0 | 100.0 |