Table 3. Definitions and data sources for Trust-wide outcome metrics.

Metric	Definition	Source of data
Referrals to critical care nursing team	Number of patients referred for review by critical care outreach nurses per 1000 bed days	Trust critical care nursing team logs
Unplanned admissions to ITU	Number of unplanned admission episodes in intensive care per 1000 bed days	Trust submissions to Intensive Care National Audit & Research Centre
Cardiac arrest rate	Number of cardiac arrests per 1000 bed days	Trust critical care nursing team logs