Table 1 Frequency of errors per severity category
NCC MERP category*No pADEspADEs
B (%)C (%)D (%)E (%)F (%)G (%)H (%)I (%)
Prescribing
    Administrative (n = 2522)2516 (99.8)6 (0.2)
    Dosing (n = 1658)1396 (84.2)220 (13.3)8 (0.5)30 (1.8)1 (0.1)2 (0.1)1 (0.1)
    Therapeutic (n = 340)25 (7.4)255 (75)4 (1.2)50 (14.7)6 (1.8)
Transcribing (n = 1205)1020 (84.6)167 (13.9)5 (0.4)12 (1.0)1 (0.1)
Total (n = 5725)4957 (86.6)648 (11.3)17 (0.3)92 (1.6)8 (0.1)2 (0.0)1 (0.0)
  • *National Coordinating Council for Medication Error Reporting and Prevention (NCC MERP) Index for categorising medication errors: B, an error occurred but the error did not reach the patient; C, an error occurred that reached the patient but did not cause patient harm; D, an error occurred that reached the patient and required monitoring to confirm that it resulted in no harm to the patient and/or required intervention to preclude harm; E, an error occurred that may have contributed to or resulted in temporary harm to the patient and required intervention; F, an error occurred that may have contributed to or resulted in temporary harm to the patient and required initial or prolonged hospitalisation; G, an error occurred that may have contributed to or resulted in permanent patient harm; H, an error occurred that required intervention necessary to sustain life; I, an error occurred that may have contributed to or resulted in the patient’s death.

  • pADE, preventable adverse drug event.