Table 1.
Characteristics of the study population
| Sillence classification | ||||
|---|---|---|---|---|
| I | III | IV | Total | |
| Sex | ||||
| Male/female | 19/15 | 4/5 | 5/5 | 28/25 |
| Family history | ||||
| Positive/total | 22/32 (68.8%) | 2/7 (28.6%) | 5/9 (55.6%) | 29/48 (60.4%) |
| Age | ||||
| Years, mean ± SD |
10.8 ± 12.4 (N = 34) |
1.17 ± 1.62a (N = 8) |
3.61 ± 4.19 (N = 9) |
8.00 ± 11.0 (N = 51) |
| Height SDS | ||||
| Mean ± SD |
− 0.96 ± 1.41 (N = 31) |
− 5.53 ± 1.57⁎⁎ (N = 7) |
− 2.43 ± 1.78⁎ †† (N = 9) |
− 1.92 ± 2.20 (N = 47) |
| L1–L4 BMD SDS | ||||
| Mean ± SD |
− 2.33 ± 1.47 (N = 28) |
− 3.51 ± 2.06 (N = 3) |
− 3.42 ± 1.43 (N = 8) |
− 2.64 ± 1.55 (N = 39) |
| Annual fracture rate | ||||
| /Year, mean ± SD |
0.54 ± 0.36 (N = 29) |
10.78 ± 10.4⁎⁎ (N = 8) |
2.88 ± 5.10† (N = 9) |
2.78 ± 6.00 (N = 46) |
| Blue sclerae | ||||
| Positive/total | 30/34 (88.2%) | 8/8 (100%) | 4/9 (44.4%) | 42/51 (82.4%) |
| DI | ||||
| Positive/total | 4/33 (12.1%) | 7/8 (87.5%) | 4/9 (44.4%) | 15/50 (30.0%) |
DI dentinogenesis imperfecta, SD standard deviation, SDS standard deviation score
ap = 0.060 vs. type I, ⁎p < 0.05 vs. type I, ⁎⁎p < 0.0001 vs. type I, †p < 0.01 vs. type III, ††p < 0.001 vs. type III