Night Time Discharges

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The proportion of patients where Dispo is a ward or step-down and where where Dispo DtTm is between 22:00 and 06:59

Indicator: Night Time Discharge Rate
Created/Raw: Created
Program: Critical Care
Start Date: April 1, 2007
End Date:
Reports: Critical Care Program Quality Indicator Report

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Used in aggregate form as "per location" and/or "per timeframe", e.g. by month/quarter/year x Ward/Unit x Hospital.

QI domain

  • Timely
  • Efficient
  • Safe

Reported as

Percent of discharges to ward per period of time.


Discharge from ICU at night occurs because of either the delay of an elective discharge, an unplanned discharge is forced due to inadequate ICU capacity. Night time discharges have been associated with adverse outcomes.

Sampling Plan / Procedure

Inclusion Criteria

100% of all survived ICU patients discharged to ward

Exclusion Criteria

Survived ICU patients who are not discharged to ward (e.g. OR, Home/PCH, other ICU)


Month, quarterly or yearly with time reference based on ICU discharge dates.

Definition and Derivation

The proportion of patients discharged to the ward or step-down where discharge occurred between 22:00 and 06:59


Num = Number of survived discharges to ward that occurred between 22:00 and 06:59


Denom = Number of survived discharges to ward


Night Time Discharge Rate (%) = Num / Denom * 100


  • Time Reference: Discharge Dates from Jan 1, 2017 to March 31, 2017
  • Total survived discharges to ward that occurred between 22:00 and 06:59 = 21
  • Total survived discharges to ward = 102
  • Night Time Discharge Rate(%) = 21 / 102 * 100= 20.6 %

Data Sources

The following fields from L_Log table are used :

SAS Program


Report Users

  • Critical Care Directors and Site Managers
  • Critical Care Quality Improvement Team

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