| Smoking Habit | Daily Brushing Habit | N of Tooth | N of DMFT | % of DMFT out of Total | % of DMFT within Region | Amount of Decrease Rate |
| Non-smoker | 1 or 2 | 3136 | 717 | 59.7 | 88.2 | 7.5 |
| 3 or more | 560 | 96 | 8.0 | 11.8 | ||
| Total | 3696 | 813 | 67.7 | 100 | ||
| 1 - 10 cigarettes/day | 1 or 2 | 1036 | 219 | 18.2 | 82.3 | 4.7 |
| 3 or more | 196 | 47 | 3.9 | 17.7 | ||
| Total | 1232 | 266 | 22.1 | 100 | ||
| More than 11 cigarettes/day | 1 or 2 | 700 | 117 | 9.7 | 95.9 | 23.4 |
| 3 or more | 28 | 5 | 0.4 | 4.1 | ||
| Total | 728 | 122 | 10.2 | 100 | ||
| Total | 1 or 2 | 4872 | 1053 | 87.7 | 87.7 | 7.1 |
| 3 or more | 784 | 148 | 12.3 | 12.3 | ||
| Total | 5656 | 1201 | 100.0 | 100 |