Length of stay is a term which is used to calculate a patient's day of admission in the hospital till the day of discharge i.e. the number of days a patient stayed in a hospital for treatment.ALOS is calculated by dividing total inpatient days by total discharges.

Four patients admitted on a hospital named Sheela, Priya, Kumar, Mani. Sheela is admitted on 4th april 2013 and discharged on 10th april 2013. Priya is admitted on 2nd april 2013 and discharged on 13th april 2013. Kumar is admitted on 15th april 2013 and discharged on 20th april 2013. Mani is admiited on 22nd april 2013 and discharged on 30th april 2013.

Number of patients = 4

Length of stay

Length of stay = date of discharge - date of admission LOS of Sheela = [(4-4-2013) - (10-4-2013)] = 6 LOS of Priya = [(2-4-2013) - (13-4-2013)] = 11 LOS of Kumar = [(15-4-2013) - (20-4-2013)] = 5 LOS of Mani = [(22-4-2013) - (30-4-2013)] = 8

Total Length of stay | = 6 + 11 + 5 + 8 |

= 30 days |

Average Length of Stay | = Total length of stay / Total number of discharges |

= 30 / 4 | |

= 7.5 days |

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