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See: [[:Category: Length of stay | Length of stay]] under [[:Category: Indicator Definitions | Indicator Definitions]].  
Calculated by [[Function LOS()]] / [[Function LOS_int()]].
{{Todo
| who = Tina 
| question = _wiki_housekeeping
* need to integrate this better and clean things out; also should make sure that queries that deal with LOS use [[Function LOS()]]
| todo_added = 2022-02-10
| todo_action = 2022-03-01
  }}
 


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.  
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 report|monthly]], [[quarterly report|quarterly]] and [[annual report|annual]] reports.


* LOS = Discharge Date/Time – Admit Date/Time.
Depending on the type of LOS, the summary statistics namely, Mean, Median, Sum or Total are included in our various [[Reports]]; see the reports pages or the various LOS pages for details.
 
See also: [[:Category: Length of stay]]
 
== 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.
 
=== [[LOS Per Service]] ===
 
=== [[LOS Per Record]] ===
 
=== [[LOS per Location]] ===
 
=== [[LOS Medicine per hospital admission]] ===
* refers as Within Hospital Medicine Ward Cumulative LOS
** this is the sum of all Medicine wards' [[LOS Per 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 Per Record]] were added.
**The summary reports  separate those who left the hospital or died  and those who went to another service  within the hospital.
 
* This can be redefined as the sum of all Medicine [[LOS Per Record]] per [[Visit Admit DtTm]] and [[Person ID]].
 
===LOS_Elapse_Ward1_Hosp===
This is not currently being reported anywhere.
 
*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.
 
* This can be redefined as as "first MEDICINE [[Service tmp entry]] until last [[Dispo DtTm]] per [[Visit Admit DtTm]]" ?
 
===LOS_ICU_Region===
This is not currently being reported anywhere.
*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 transferred 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.


''For example'':
Can be defined as the sum of all ICU [[LOS Per Record]] that have less than 48hrs between the previous [[Dispo DtTm]] and the next admit dttm, per [[Person_ID]].
* 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)


== Legacy ==
===Short stay===
* '''resuscitated''' patients with a short LOS used to be ignored, see https://ccmdb.kuality.ca/index.php?title=Definition_of_a_Critical_Care_Laptop_Admission&direction=next&oldid=48590


'''Note:''' The number of days for [[:Category:TISS| TISS]] (ICU) and [[ITISS]] (Medicine) can be different than the LOS because the '''[[TISS - General Information#The 2 Hour rule for TISS|2 hour rule]]''' applies.
===LOS vs TISS LOS ===
* '''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]].


'''Note:''' As of October 24, 2011 all patients that arrive in the ICU in the process of [[:Category: Arrest | resuscitation]] should be included in the database, even if they are there for a [[LOS | short lenght of time]] and subsequently pass away.  This has been recommended by the [[ICU Database Task Group]] and approved by [[Dr. Dan Roberts]] from the [[:Category:Steering Committee | Steering Committee]]. Do the best you can to formulate an apache score either with vital signs & labs during the resuscitation, if available, or the vital signs & labs just before the arrest if available. --[[User:LKolesar|LKolesar]] 08:41, 25 October 2011 (CDT
== Related Articles ==
{{Related Articles}}


[[Category:Standards and Conventions]]
[[Category:Statistical Analysis]]
[[Category:Statistical Analysis]]
[[Category: Length of stay]]
[[Category:Length of stay]]
[[Category:Multiple Encounter linking]]
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