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this article has evil twins, need to reconcile, search for LOS Ttenbergen 21:13, 2014 October 23 (CDT)

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See: Category: Length of stay

For our purposes, LOS (length of stay) is the combined number of days a patient spent on units on which we collect data. It is not the amount of time spent in the hospital as we don't have access to hospital admit/discharge data. Ward LOS and ICU LOS are included in our monthly, quarterly and annual reports.

  • LOS = Discharge Date/Time – Admit Date/Time.

For example:

  • Admit Date/Time: 20 May 2008 11:30
  • Discharge Date/Time: 21 May 2008 17:45
  • LOS = 1.260 (3 decimal digit accuracy is used for individual patients, 1 digit for averages)

different kinds of LOSs

  • Dr. Allan Garland and Julie met March 12, 2014 and identifed the different types of LOS currently calculated and reported as well as assigned a name to each one accordingly. There will be more to be added once when we receive the WRHA data on Hospital Admission and Discharge Dates in the near future.
  • Reminder for Julie - Need to revisit the other LOS related categories. JMojica 12:54, 2014 March 12 (CDT)


  • refers as the Length of Stay per record
    • simply calculated as the difference between the Discharge and Admit Dates of each record. A record can be either a Medicine Ward or ICU patient.
    • The summary reports include all patients.


  • refers as Within Hospital Medicine Ward Cumulative LOS
    • this is the sum of all Medicine wards' LOS_Record within one Hospital admission per hospital. It is important to determine correctly the different wards the patient stayed within a hospital admission and this is done by using the time gaps between records and/or the locations the patient came from and went to. If a patient stayed in more than one Medicine wards during his hospital admission until he left the hospital, then all his wards' LOS_Record were added.
    • The summary reports separate those who left the hospital or died and those who went to another service within the hospital.


  • refers to the length of stay from the FIRST ward admission until the last discharge date during one hospital admission per hospital.
    • First, identify the FIRST ward the patient stayed and the last ward or ICU unit the patient stayed during a given hospital admission per hospital.
    • Then calculate the difference between the LAST Discharge Date and the First Admit Date as the elapse LOS.
    • If the patient has prior stay in ICU before the first ward stay, the prior ICU stay is not included.
    • The summary reports separate those who left the hospital or died and those who went to another service within the hospital.


  • refers to the length of continuous stay in one or more ICU on same or different hospitals in the region
    • First, identify the patient who had tranferred to another ICU/OR/Recovery area on same of different hosp within 48 hours and consider their ICU stays as continuous ICU stay.
    • Then calculate the difference between the Discharge Date of the last ICU stay and the Admit Date of the First ICU stay.
    • The summary reports include all patients with continuous ICU stay.

See also


LOS Medicine per hospital admission and LOS Medicine per ward stay may duplicate content above. Do they? If we ever split these out into reporting documentation indicator pages we will need to make sure these are not duplicated.

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Short stay


  • LOS vs TISS LOS - TISS76-2 hour rule used to mean that # of TISS days might be different than LOS. This is no longer the case as of TISS28.

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