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2 × 2 contingency table in 13 surgical patients where dopt was applied to predict the finger motor deficit
| d ≥ dopt | d < dopt | Total (n) | |
|---|---|---|---|
| No deficit | 6 | 1 | 7 |
| Deficit | 0 | 6 | 6 |
| Total (n) | 6 | 7 | 13 |
Fisher’s exact probability test [Agresti, 1992] was performed for 2 × 2 contingency table (P-value of Fisher’s exact test = 0.004). True positive rate (0.86), false positive rate (0) and accuracy (0.92) were obtained to predict an optimal margin, dopt ensuring no motor deficit.
