| Proven intervention | An intervention that is (1) generally accepted as being effective (2) with benefits that generally outweigh the risk and (3) supported by high-quality evidence and/or reputable practice guidelines recommending its use |
| Reasons for non-use | Generally accepted patient-specific reasons that would render an intervention not suitable for a patient—for example, absolute or relative contraindications and patient refusal |
| Ideal intervention opportunity | An instance where a patient has an indication for an intervention and no generally accepted reason for non-use of the intervention |
| Ideal Intervention Index | At or near time of discharge, the proportion of ideal intervention opportunities implemented |
| Justified Non-Use Index | Proportion of interventions not implemented where generally accepted reasons for non-use were present |