| 365 (69.5) | 1 Errors related to the processes of healthcare |
| 112 (21.3) | 1.1 Errors in practice and healthcare systems |
| 12 (2.3) | 1.1.1 Errors relating to incorrect patient identification |
| 15 (2.9) | 1.1.2 Appointments and message handling errors |
| 28 (5.3) | 1.1.3 Patient record and filing system errors |
| 25 (4.8) | 1.1.4 Recall event and recall systems errors |
| 6 (1.1) | 1.1.5 Computer systems errors |
| 6 (1.1) | 1.1.6 Errors in the maintenance of a safe physical environment |
| 7 (1.3) | 1.1.7 Errors in provision of care after hours or inadequate staff coverage |
| 3 (0.6) | 1.1.8 Errors relating to patient confidentiality issues |
| 10 (1.9) | 1.1.9 Practice and healthcare systems errors not otherwise specified |
| 65 (12.4) | 1.2 Investigation errors |
| 7 (1.3) | 1.2.1 Errors relating to incorrect patient identification |
| 12 (2.3) | 1.2.2 Errors in the process of requesting investigations |
| 9 (1.7) | 1.2.3 Errors in the process of undertaking investigations |
| 35 (6.7) | 1.2.4 Errors in reporting processes or managing investigation reports |
| 2 (0.4) | 1.2.5 Investigation errors not otherwise specified |
| 107 (20.4) | 1.3 Medication errors |
| 31 (5.9) | 1.3.1 Electronic prescription writing or medication charting errors |
| 16 (3.1) | 1.3.2 Other prescription or medication charting errors |
| 38 (7.2) | 1.3.3 Medication dispensing and delivery errors |
| 11 (2.1) | 1.3.4 Patient self-administration of medication errors |
| 11 (2.1) | 1.3.5 Medication errors not otherwise specified |
| 13 (2.5) | 1.4 Treatment errors (non-medication) |
| 11 (2.1) | 1.4.1 Errors in the process of providing immunisations |
| 1 (0.2) | 1.4.2 Errors in the process of undertaking procedures |
| 1 (0.2) | 1.4.3 Non-medication treatment errors not otherwise specified |
| 68 (12.9) | 1.5 Communication errors and process errors not otherwise specified |
| 17 (3.2) | 1.5.1 Errors in general communication with patients |
| 31 (5.9) | 1.5.2 Hospital discharge and other hospital-based communication errors |
| 9 (1.7) | 1.5.3 Errors in referral to other healthcare providers |
| 8 (1.5) | 1.5.4 Errors in general communication with other healthcare providers |
| 3 (0.6) | 1.5.5 Communication and process errors not otherwise specified |
| 160 (30.5) | 2 Errors related to the knowledge and skills of health professionals |
| 62 (11.8) | 2.1 Errors in diagnosis |
| 2 (0.4) | 2.1.1 Errors in patient history taking |
| 11 (2.1) | 2.1.2 Errors in patient physical examination |
| 27 (5.1) | 2.1.3 Errors in investigations requested or their interpretation |
| 22 (4.2) | 2.1.4 Diagnosis-related errors not otherwise specified |
| 98 (18.7) | 2.2 Errors in managing patient care |
| 57 (10.9) | 2.2.1 Medication management errors |
| 9 (1.7) | 2.2.2 Knowledge or skills errors in undertaking immunisations |
| 13 (2.5) | 2.2.3 Knowledge or skills errors in undertaking procedures |
| 19 (3.6) | 2.2.4 Errors managing care not otherwise specified |