Table 3 Overall results of the two observers’ two evaluations
From: Is the diagnostic validity of conventional radiography for Lisfranc injury acceptable?
| Â | Observer A | Observer B | Mean value | ||
|---|---|---|---|---|---|
First time | Three months later | First time | Three months later | ||
TPR | 227/307 (73.9%) | 248/307 (80.8%) | 263/307 (85.7%) | 267/307 (87.0%) | 81.8% |
TNR | 85/100 (85.0%) | 89/100 (89.0%) | 94/100 (94.0%) | 92/100 (92.0%) | 90.0% |
FPR | 15/100 (15.0%) | 11/100 (11.0%) | 6/100 (6.0%) | 8/100 (8.0%) | 10.0% |
FNR | 80/307 (26.1%) | 59/307 (19.2%) | 44/307 (14.3%) | 40/307 (13.0%) | 18.2% |
PPV | 227/242 (93.8%) | 248/259 (95.8%) | 263/269 (97.8%) | 267/275 (97.1%) | 96.1% |
NPV | 85/165 (51.5%) | 89/148 (60.1%) | 94/138 (68.1%) | 92/132 (69.7%) | 62.4% |
ACC | 312/407 (76.7%) | 337/407 (82.8%) | 357/407 (87.7%) | 359/407 (88.2%) | 83.8% |
BER | 20.5% | 15.1% | 10.2% | 10.5% | 14.1% |
Agreementa | Lisfranc (n = 307) | κ = 0.419, P < 0.001 | |||
All (n = 407) | κ = 0.601, P < 0.001 | ||||