TABLE 3: Mean DMFT according to age group and grades of fluorosis
| Grades of fluorosis | Group I | Group II | Group III | Group IV | Group V | Group VI | ||||||||||||||||||||||||||||||
| No. | DMFT | Mean | No. | DMFT | Mean | No. | DMFT | Mean | No. | DMFT | Mean | No. | DMFT | Mean | No. | DMFT | Mean | |||||||||||||||||||
| Grade 1 | 18 | 15 | 0.83 | 17 | 19 | 1.11 | 20 | 10 | 0.5 | 13 | 13 | 1 | 23 | 14 | 0.6 | 23 | 32 | 1.45 | ||||||||||||||||||
| Grade 2 | 27 | 30 | 1.11 | 31 | 47 | 1.11 | 25 | 31 | 1.24 | 20 | 35 | 1.75 | 75 | 128 | 1.70 | 49 | 116 | 2.36 | ||||||||||||||||||
| Grade 3 | 5 | 9 | 1.8 | 8 | 16 | 2 | 16 | 31 | 1.93 | 8 | 23 | 2.87 | 26 | 57 | 2.19 | 27 | 86 | 3.18 | ||||||||||||||||||
| Grade 4 | 1 | 4 | 4 | 2 | 7 | 3.5 | 4 | 13 | 3.25 | 3 | 7 | 2.33 | 5 | 26 | 5.2 | 5 | 21 | 4.2 | ||||||||||||||||||
| Grade 5 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||
| Total | 52 | 59 | 8.74 | 58 | 89 | 8.12 | 65 | 85 | 6.92 | 44 | 78 | 7.95 | 129 | 225 | 9.69 | 103 | 255 | 11.19 | ||||||||||||||||||
| Mean | 1.74 ± 1.31 | 1.62 ± 1.04 | 1.38 ± 1.16 | 1.59 ± 0.80 | 1.93 ± 1.96 | 2.23 ± 1.17 | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ± SD | ||||||||||||||||||||||||||||||||||||