Average Length of Stay

What is Average Length of Stay?

Average Length of Stay is a key healthcare industry indicator useful in monitoring for potential changes in facility processes or environment and opportunities to improve efficiency. It can vary depending on the type of facility and treatments offered at the facility. It is typically measured in days where partial days are rounded up to the next full day.

How to calculate Average Length of Stay

ƒ Count(days stayed for all patients) / Count(patients)

Favourable trend

Between a range

Complexity level:
Beginner

Date created: Apr 09, 2019

Latest update: May 02, 2019

Tell me more about this metric

Average Length of Stay is calculated by summing the length in days of all the stays (where partial days, including non-overnight stays, are rounded up to the next full day) and dividing by the number of patients. This metric may be segmented according to condition, treatment or demographic to take into consideration factors that can affect length of stay.

Example

Example A, a healthcare facility has 4 patients in the month of April:

Patient A arrives April 2 and leaves April 4 = 3 day stay
Patient B arrives April 2 and leaves April 3 = 2 day stay
Patient C arrives April 15 and leaves the same day = 1 day stay
Patient D arrives April 16 and leaves April 23 = 8 day stay

The Average Length of Stay is

     (3 + 2 + 1 + 8 ) days / 4 patient stays = 14 / 4 = 3.5 days

Example B, a healthcare facility has 4 influenza patients in the month of February:

Patient A (age 70) arrives February 2 and leaves February 4 = 3 day stay
Patient B (age 63)  arrives February 2 and leaves February 3 = 2 day stay
Patient C (age 40) arrives February 15 and leaves the same day = 1 day stay
Patient D (age 74) arrives February 16 and leaves February 23 = 8 day stay

The Average Length of Stay for the <65 age group is

          (2 + 1) days / 2 patient stays = 3 / 2 = 1.5 days

The Average Length of Stay for the 65+ age group is

          (3 + 8) days / 2 patient stays = 11 / 2 = 5.5 days

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