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Reasons for failure to obtain paediatric bone index standard deviation score (n = 35)
| Reason for failure | Number | Percentage |
|---|---|---|
| Missing bone age | 2 | 5.7 |
| Contractures of the hand causing crossed projection of the metacarpals (Fig. 2) | 17 | 48.6 |
| Excessive sharpening giving lack of contrast between bone tissue and surrounding soft tissue | 8 | 22.9 |
| Anatomical deformities of the bones (not possible to determine exact margins of regions of interest) | 3 | 8.6 |
| Unclear | 5 | 14.3 |
