Table 4 The recognition rate of Lisfranc injury in conventional radiographs
From: Is the diagnostic validity of conventional radiography for Lisfranc injury acceptable?
| Â | Observer A | Observer B | Mean value | *P value | ||
|---|---|---|---|---|---|---|
First time | Three months later | First time | Three months later | |||
All ( n  = 307) | 227/307 (73.9%) | 248/307 (80.8%) | 263/307 (85.7%) | 267/307 (87.0%) | 81.8% | 0.004# |
Chiodo-Myerson’s three-column classification [18] | ||||||
 One column ( n  = 44) | 27/44 (61.4%) | 32/44 (72.7%) | 36/44 (81.8%) | 34/44 (77.3%) | 73.3% | 0.171 |
 A ( n  = 7) | 3/7 (42.9%) | 4/7 (57.1%) | 5/7 (71.4%) | 5/7 (71.4%) | 60.7% | 0.608 |
 B ( n  = 37) | 24/37 (64.9%) | 28/37 (75.7%) | 31/37 (83.8%) | 29/37 (78.4%) | 75.7% | 0.278 |
 Two columns ( n  = 136) | 90/136 (66.2%) | 99/136 (72.8%) | 106/136 (77.9%) | 113/136 (83.1%) | 75.0% | 0.037# |
 AB ( n  = 69) | 39/69 (56.5%) | 48/69 (69.6%) | 51/69 (73.9%) | 55/69 (79.7%) | 69.9% | 0.051 |
 AC ( n  = 2) | 0/2 (0.0%) | 1/2 (50.0%) | 1/2 (50.0%) | 1/2 (50.0%) | 37.5% | 1.000 |
 BC ( n  = 65) | 51/65 (78.5%) | 50/65 (76.9%) | 54/65 (83.1%) | 57/65 (87.7%) | 81.5% | 0.267 |
Three columns (ABC) ( n  = 127) | 110/127 (86.6%) | 117/127 (92.1%) | 121/127 (95.3%) | 120/127 (94.5%) | 92.1% | 0.111 |
Displacement classification | ||||||
 Displaced injury ( n  = 84) | 77/84 (91.7%) | 81/84 (96.4%) | 81/84 (96.4%) | 82/84 (97.6%) | 95.5% | 0.496 |
 Non-displaced injury ( n  = 223) | 150/223 (67.3%) | 167/223 (74.9%) | 182/223 (81.6%) | 185/223 (83.0%) | 76.7% | 0.005# |