Table 2.
Reference values for dental age estimation among 520 young Ugandans using Demirjian’s classification
| Demirjian stage | Tooth 48 (n = 510) | Tooth 38 (n = 501) | ||||||
|---|---|---|---|---|---|---|---|---|
| No. | Median | LQ, UQ | Mean (SD) | No. | Median | LQ, UQ | Mean (SD) | |
| A | 2 | 10 | 10, 10 | 10 (0.0) | 1 | 10 | – | 10 (0.0) |
| B | 16 | 10 | 10, 11.5 | 10.9 (1.4) | 13 | 10 | 10, 11.5 | 10.8 (1.2) |
| C | 83 | 11 | 11, 12 | 11.7 (1.5) | 85 | 11 | 11, 12 | 11.7 (1.5) |
| D | 61 | 12 | 11, 14 | 12.6 (1.6) | 62 | 13 | 11, 14 | 12.6 (1.5) |
| E | 68 | 14 | 13, 15 | 13.9 (1.5) | 62 | 14 | 13, 15 | 13.9 (1.6) |
| F | 59 | 15 | 14, 16 | 15.4 (1.6) | 63 | 15 | 14, 17 | 15.4 (1.7) |
| G | 96 | 18.5 | 17, 20 | 18.4 (1.6) | 93 | 19 | 17, 20 | 18.5 (1.6) |
| H | 125 | 21 | 19, 22 | 20.1 (1.8) | 122 | 21 | 19, 22 | 20.3 (1.7) |
LQ and UQ represent lower quartile and upper quartile respectively. A–H are the eight stages of Demirjian’s classification. The difference between the sample number, 520 and number of teeth on each side (Right—510 and left—501) is accounted for by missing teeth or those that had not yet commenced mineralisation