TABLE II.
Fracture Characteristics*
| Feature | No Fracture (N = 127) | Fracture (N = 61) | P Value† |
|---|---|---|---|
| Pain | <0.01 | ||
| Mild | 53 (43.1%) | 11 (18.0%) | |
| Moderate | 44 (35.8%) | 26 (42.6%) | |
| Severe | 26 (21.1%) | 24 (39.3%) | |
| Lesion type | <0.01 | ||
| Blastic | 56 (44.4%) | 1 (1.6%) | |
| Mixed | 22 (17.5%) | 6 (9.8%) | |
| Lytic | 48 (38.1%) | 54 (88.5%) | |
| Size relative to bone diameter | <0.01 | ||
| <1/3 | 51 (42.9%) | 5 (8.5%) | |
| 1/3 to 2/3 | 34 (28.6%) | 12 (20.3%) | |
| >2/3 | 34 (28.6%) | 42 (71.2%) | |
| Location | 0.08 | ||
| Epiphysis | 22 (17.6%) | 4 (6.6%) | |
| Metaphysis | 29 (23.2%) | 11 (18.0%) | |
| Diaphysis | 74 (59.2%) | 46 (75.4%) | |
| Diaphysis location | 0.053 | ||
| Proximal 1/3 | 39 (53.4%) | 28 (59.6%) | |
| Middle 1/3 | 29 (39.7%) | 15 (31.9%) | |
| Distal 1/3 | 5 (6.9%) | 4 (8.5%) | |
| Mediolateral location | 0.25 | ||
| Central | 57 (47.1%) | 33 (54.1%) | |
| Lateral | 28 (23.1%) | 14 (23.0%) | |
| Medial | 36 (29.8%) | 14 (23.0%) | |
| Breach | <0.01 | ||
| Yes | 28 (22.4%) | 56 (91.8%) | |
| No | 97 (76.6%) | 5 (8.2%) | |
| No. of lesions | 1.8 ± 2.7 | 1.3 ± 0.9 | 0.19 |
*
The Mirels score includes pain, lesion type, and lesion size. We also assessed other radiographic features including location within the long bone, diaphyseal location, mediolateral location, breaching, and number of lesions. The values are given as the number with the percentage in parentheses or as the mean ± standard deviation.
†
The independent-samples t test was used for ordinal data, and the chi-square test was used for categorical data. Significant p values are boldfaced.