Table 1.
Correct fracture classification by filter and fracture type
| Fracture type | DICOM | Retinex | GgG | Heq | BF | p value |
|---|---|---|---|---|---|---|
| Subcapital (n = 319) | 182 (57%) | 185 (58%) | 163 (51%) | 188 (59%) | 178 (56%) | 0.3 |
| Intertrochanteric (n = 261) | 113 (43%)* | 132 (50%)* | 77 (29%) | 121 (46%) | 119 (45%) | 0.001 |
| Base of neck (n = 145) | 40 (27%) | 37 (25%) | 39 (27%) | 38 (26%) | 43 (30%) | 0.94 |
| Interobserver agreement† | 48% (± 11%)‡ | 54% (± 10%)‡ | 51.6% (± 10.5%)‡ | 47 % (± 12%)‡ | 48% (± 10%)‡ | 0.001§ |
* p = 0.114; †interobserver agreement was calculated only for frames in which at least one of the testers was correct in diagnosis of fracture type; values are expressed as mean (± standard deviation); ‡adjusted p < 0.05 (pair-wise comparisons with the best, ie, Retinex); §using analysis of variance; GgG = triple gray filter; Heq = adaptive histogram equalization filter; BF = bone filter.