Incorrect coding by diagnosis group
| E-code | Diagnosis group | Total | % correct (95% CI) | % Correct to 4 digit level, 5th digit incorrect | % Correct to 3 digit level, 4th digit incorrect | % Correct to group level, 2nd or 3rd digit incorrect | % Incorrect at group level |
|---|---|---|---|---|---|---|---|
| 820–829 | Lower limb fracture | 263 | 97 (95–99) | 0 | 1 | 1 | 0 |
| 810–819 | Upper limb fracture | 228 | 96 (93–98) | 2 | 1 | 0 | 0 |
| 996–999 | Complications | 222 | 94 (90–96) | 0 | 1 | 2 | 3 |
| 850–854 | Intracranial | 175 | 93 (88–96) | 0 | 0 | 6 | 2 |
| 960–979 | Poisoning | 108 | 92 (85–96) | 0 | 2 | 4 | 3 |
| 870–897 | Open wounds | 204 | 93 (88–95) | 1 | 3 | 2 | 1 |
| 800–805 | Skull, neck/trunk fractures | 144 | 98 (94–99) | 0 | 1 | 0 | 1 |
| Other diagnoses | 326 | 93 (90–96) | 1 | 1 | 0 | 5 | |
| Total | 1670 | 95 (93–96) | 1 | 1 | 2 | 2 |