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3.9 Average length of stay for hip fracture patients aged 65 years and over, major and large public hospitals, 2012–13

Indicator Attributes

Identifying and definitional attributes

Metadata item type:Help on this termIndicator
Indicator type:Help on this termIndicator
Short name:Help on this termHip fracture average length of stay in hospital by peer group, 65 years and over, 2012-13
Synonymous names:Help on this termALOS fractured hip
METEOR identifier:Help on this term601268
Registration status:Help on this term
  • Australian Commission on Safety and Quality in Health Care, Standard 23/11/2016
  • National Health Performance Authority (retired), Retired 01/07/2016
Description:Help on this term

Average (mean) length of stay (number of days) for multi-day stay hip fracture patients aged 65 years and over, major and large public hospitals, 2012–13

Indicator set:Help on this term

Australian Atlas of Healthcare Variation
Australian Commission on Safety and Quality in Health Care, Standard 23/11/2016
National Health Performance Authority (retired), Retired 01/07/2016

Collection and usage attributes

Population group age from:Help on this term

65 years and over

Computation description:Help on this term

Presented as the average number of days, by hospital

Only hospitals in the major and large peer groups and which had at least 10 separations were included in the analysis. For more information about these peer groups see /content/index.phtml/itemId/584666

To calculate the average length of stay the key unit that records information about a patient's stay in hospital is called an 'episode of admitted patient care'. This records information about the patient and the care they received in hospital, including:

  • Sex
  • Diagnosis
  • Procedure type
  • Date of admission and
  • Date of separation/discharge.

Exclusions:

The average length of stay indicator relates only to acute patients with a multi-day, or overnight, stay. The following episodes of care are excluded from all reported measures:

  • Same day episodes, i.e. patients admitted and discharged on the same day
  • Episodes for non-acute care
  • Episodes where the patient died
  • Episodes where the patient transferred to another facility within 2 days.

Outlier removal: 

Episodes determined to be extreme long stay outliers were removed. Outlier bounds are derived for each AR-DRG. The method selected for deriving national level outlier bounds uses the inter-quartile ranges as the guide for outlier exclusion. The method of detecting extreme outliers (mEO) is as follows:

mEO = Q3 + k*(Q3-Q1)

Where

Q1 equals the 25th percentile value

Q3 equals the 75th percentile value

k equals non-negative values of a constant.

Sensitivity analysis was conducted to identify k and resulted in k=10 being selected.

Computation:Help on this term

Numerator ÷ denominator

Numerator:Help on this term

Number of overnight bed days at major and large public hospitals attributable to hip fracture in patients aged 65 years and over.

Numerator data elements:Help on this term
Data Element / Data Set

Data ElementHelp on this term

Episode of admitted patient care—length of stay (excluding leave days), total N[NN]

Data SourceHelp on this term

National Hospital Morbidity Database (NHMD)

NMDS / DSSHelp on this term

Admitted patient care NMDS 2012-13

Guide for useHelp on this term

Data source type: Administrative by-product data

Data Element / Data Set

Data ElementHelp on this term

Person—date of birth, DDMMYYYY

Data SourceHelp on this term

National Hospital Morbidity Database (NHMD)

NMDS / DSSHelp on this term

Admitted patient care NMDS 2012-13

Guide for useHelp on this term

Data source type: Administrative by-product data

Used to calculate 65 years and over age group.

Data Element / Data Set

Data ElementHelp on this term

Episode of care—additional diagnosis, code (ICD-10-AM 7th edn) ANN{.N[N]}

Data SourceHelp on this term

National Hospital Morbidity Database (NHMD)

NMDS / DSSHelp on this term

Admitted patient care NMDS 2012-13

Guide for useHelp on this term

Inclusion codes for Principal and Additional diagnosis:

ICD-10-AM (7th edn) codeDescription
S72.00Fracture of neck of femur, part unspecified 
S72.01Fracture of intracapsular section of femur.
S72.02Fracture of upper epiphysis (separation) of femur
S72.03Fracture of subcapital section of femur
S72.04Fracture of midcervical section of femur
S72.05Fracture of base of neck of femur
S72.08Fracture of other parts of neck of femur
S72.10Fracture of trochanteric section of femur, unspecified
S72.11Fracture of intertrochanteric section of femur
S72.2Subtrochanteric fracture

Data source type: Administrative by-product data

Data Element / Data Set

Data ElementHelp on this term

Episode of care—principal diagnosis, code (ICD-10-AM 7th edn) ANN{.N[N]}

Data SourceHelp on this term

National Hospital Morbidity Database (NHMD)

NMDS / DSSHelp on this term

Admitted patient care NMDS 2012-13

Denominator:Help on this term

Number of multi-day stays in hospital for people aged 65 years and over attributable to a fractured hip for a major or large public hospital.

Denominator data elements:Help on this term
Data Element / Data Set

Data ElementHelp on this term

Episode of care—additional diagnosis, code (ICD-10-AM 7th edn) ANN{.N[N]}

Guide for useHelp on this term

Inclusion codes for Principal and Additional diagnosis:

ICD-10-AM (7th edn) codeDescription
S72.00Fracture of neck of femur, part unspecified 
S72.01Fracture of intracapsular section of femur.
S72.02Fracture of upper epiphysis (separation) of femur
S72.03Fracture of subcapital section of femur
S72.04Fracture of midcervical section of femur
S72.05Fracture of base of neck of femur
S72.08Fracture of other parts of neck of femur
S72.10Fracture of trochanteric section of femur, unspecified
S72.11Fracture of intertrochanteric section of femur
S72.2Subtrochanteric fracture

Data source type: Administrative by-product data

Data Element / Data Set

Data ElementHelp on this term

Episode of care—principal diagnosis, code (ICD-10-AM 7th edn) ANN{.N[N]}

NMDS / DSSHelp on this term

Admitted patient care NMDS 2012-13

Disaggregation:Help on this term

Disaggregation is by:

  • Australian public hospital
  • Hospital peer group (major and large only). For more information about the hospital peer groups used see /content/index.phtml/itemId/584666
Disaggregation data elements:Help on this term
Data Element / Data Set

Data ElementHelp on this term

Establishment—organisation identifier (state/territory), NNNNN

Data SourceHelp on this term

National Hospital Morbidity Database (NHMD)

NMDS / DSSHelp on this term

Admitted patient care NMDS 2012-13

Guide for useHelp on this term

Data source type: Administrative by-product data

Used for disaggregation by public hospital

Data Element / Data Set

Data ElementHelp on this term

Hospital—hospital peer group, modified code N

Representational attributes

Representation class:Help on this termMean (average)
Data type:Help on this termTime period
Unit of measure:Help on this termTime (e.g. days, hours)
Format:Help on this term

Days, rounded to 1dp

Data source attributes

Data sources:Help on this term
Data Source

National Hospital Morbidity Database (NHMD)

Frequency

Annual

Data custodian

Australian Institute of Health and Welfare

Accountability attributes

Reporting requirements:Help on this term

Australian Commission of Safety and Quality in Health Care's Atlas of Healthcare Variation, released November 2015 

Organisation responsible for providing data:Help on this term

Australian Institute of Health and Welfare

Accountability:Help on this term

Australian Commission of Safety and Quality in Health Care

Source and reference attributes

Submitting organisation:Help on this term

National Health Performance Authority

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