Probability of base events (en refers to error class in figure 2)
| Base events | Probability (95% CI) |
| Patient is infectious (e0) | 0.27 (0.17 to 0.35) |
| Verbal handover at Radiology did not occur (e1) | 0.93 (0.88 to 0.98) |
| Verbal handover at Radiology occurred, but failed to prevent error (e2) | 0 |
| Transfer form was not completed by Radiology coordinator (e3) | 0.52 (0.42 to 0.62) |
| Transfer form was completed by Radiology coordinator, but failed to prevent error (e4) | 0.22 (0.14 to 0.30) |
| Verbal handover at ward did not occur (e5) | 0.74 (0.65 to 0.83) |
| Verbal handover at ward occurred, but failed to prevent error (e6) | 0 |
| Transfer form was not signed off by ward nurse (e7) | 0.56 (0.46 to 0.66) |
| Transfer form was signed off by ward nurse, but failed to prevent error (e8) | 0.30 (0.21 to 0.39) |