Table 1

Definitions and selected examples of events

Adverse event
 Definition: An injury, with varying possible levels of harm, which may result from medical management or patient self-management
 Examples
  Polyuria and polydipsia from severe hyperglycaemia. Patient ran out of insulin because he was told to increase dose at prior visit but was not given a new prescription.
  Periodic hypoglycaemia; patient gets sweaty and shaky with midday exercise
Potential adverse event
 Definition: An unsafe state, not currently an event, but likely to lead to an event if it persists without intervention
 Examples
  Despite physician prescription, pharmacy does not dispense correct glucometre strips because of formulary change. Patient unable to check glucose and continues to administer insulin in the absence of any monitoring.
  Patient with chronic kidney disease (asymptomatic) taking non-steroidal anti-inflammatory drugs despite instruction to discontinue.