Percentages of errors at each stage
| Error description | Stage | Median (95% credible interval) |
| Error in obtaining drug | Stage 1 | 5.34 (2.59 to 10.3) |
| Error in obtaining diluent | Stage 2 | 6.78 (3.02 to 14.1) |
| Error in reconstituting drug and diluent | Stage 3 | 31.0 (11.8 to 49.6) |
| Error in checking patient's identity | Stage 4 | 0.07 (0.01 to 1.00) |
| Error in checking for patient allergies | Stage 5 | 15.1 (0.09 to 57.5) |
| Error in checking route of drug administration | Stage 6 | 0.50 (0.12 to 1.19) |
| Error in checking drug dose | Stage 7 | 4.11 (1.81 to 8.50) |
| Error in checking patency of cannula | Stage 8 | 4.51 (0.62 to 40.3) |
| Error in expelling air from syringe | Stage 9 | 1.00 (0.13 to 7.58) |
| Error in administering drug | Stage 10 | 21.7 (6.51 to 48.8) |
| Error in flushing cannula | Stage 11 | 5.50 (0.54 to 20.5) |
| Error in signing prescription chart | Stage 12 | 5.34 (0.55 to 20.2) |
| Omission error | 3.45 (0.84 to 10.1) |