Table 1.
Effects of changing the levels of accepted and unaccepted failure rate on the frequency distributions of the trainees who recorded an improvement in performance with CUSUM and on the mean number (±SD) of epidurals carried out to achieve the improvement.
| Failure rate | Number of trainees | Number of epidurals | ||||||
|---|---|---|---|---|---|---|---|---|
| Accepted | Not accepted | Study (21) | Control (21) | OR (CI 95%) | p.value | Study | Control | p.value |
| 10 | 30 | 14 (67%) | 8 (38%) | 3.25 (1.02; 12.1) | <.05 | 18 (±13) | 17 (±11) | >.05 |
| 10 | 40 | 16 (76%) | 16 (76%) | 1 (0.23; 4.26) | >.05 | 12 (±8) | 12 (±9) | >.05 |
| 20 | 30 | 9 (42%) | 7 (33%) | 1.5 (0.43; 5.4) | >.05 | 28 (±10) | 31 (±10) | >.05 |
| 20 | 35 | 13 (61%) | 7 (33%) | 3.15 (1.01; 11.3) | <.05 | 17 (±7) | 19 (±10) | >.05 |
| 20 | 40 | 16 (76%) | 14 (67%) | 1.6 (0.42; 6.51) | >.05 | 13 (±6) | 18 (±13) | >.05 |