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Australian Atlas of Healthcare Variation: Third- and fourth-degree perineal tears for all vaginal births, 2012-2014

Identifying and definitional attributes

Metadata item type:Help on this termIndicator
Indicator type:Help on this termIndicator
Short name:Help on this termThird and fourth degree perineal tears for all vaginal births, 2012-2014
METeOR identifier:Help on this term639086
Registration status:Help on this termAustralian Commission on Safety and Quality in Health Care, Standard 07/06/2017
Description:Help on this term

Number of women who have a third or fourth degree perineal laceration after giving birth vaginally, age standardised. Data are disaggregated by the area in which the mother lives.

Rationale:Help on this term

Third and fourth degree perineal lacerations cause significant ongoing maternal morbidity. This is an outcome indicator that measures their occurrence.

Indicator set:Help on this termAustralian Atlas of Healthcare Variation Australian Commission on Safety and Quality in Health Care, Standard 07/06/2017

Collection and usage attributes

Population group age from:Help on this term

Females 15-44 years of age

Computation description:Help on this term

Number of women who had a third or fourth degree perineal laceration after giving birth vaginally.

Inclusion codes and descriptions:
Birth Method

Code Description
1 Vaginal - non-instrumental
2 Vaginal - forceps
5 Vaginal - vacuum extraction

 

Postpartum perineal status

Code Description
4 3rd degree laceration
7 4th degree laceration

 

Presented as a number per 1,000 women.

Rates are directly age standardised to the 2001 Australian female population aged 15–44, using the age groups: 15-19, 20-24, 25-29, 30-34 and 35-44.

For more information about age-standardisation in general see http://meteor.aihw.gov.au/content/index.phtml/itemId/327276

 

Analysis by Statistical Area Level 3 (SA3) is based on usual residence of the mother.

 

Computation:Help on this term

1,000 × (Numerator ÷ Denominator)

Numerator:Help on this term

The number of women who had a third or fourth degree perineal laceration after giving birth vaginally.

Numerator data elements:Help on this term
Data Element / Data SetFemale (mother)—postpartum perineal status, code N[N]
Data Source
AIHW National Perinatal Data Collection (NPDC)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Perinatal NMDS 2012-13

Perinatal NMDS 2013-14


Data Element / Data SetBirth event—birth method, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Perinatal NMDS 2012-13

Perinatal NMDS 2013-14


Data Element / Data SetPerson—date of birth, DDMMYYYY
Data Source
AIHW National Perinatal Data Collection (NPDC)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Perinatal NMDS 2012-13

Perinatal NMDS 2013-14


Denominator:Help on this term

The number of women who gave birth vaginally 2012-2014.

Denominator data elements:Help on this term
Data Element / Data SetBirth event—birth method, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Perinatal NMDS 2012-13

Perinatal NMDS 2013-14


Disaggregation:Help on this term

SA3 by :

  • Remoteness (ASGC Remoteness structure) and Socio-Economic Indexes for Areas (SEIFA) Index of Relative Socioeconomic Disadvantage (IRSD)

State and territory by:

  • Indigenous status

  • Patient elected accommodation status 

Cells of less than 5 have been suppressed. This is the lowest level of suppression that all states and territories have agreed to for the release of data from the National Perinatal Data Collection.            

Crude rates have been suppressed where the denominator is less than 100, for reliability purposes. The corresponding age standardised rate has also been suppressed in these cases.             

In addition, age standardised rates have been suppressed where the denominator for any age-stratified groups have fewer than 10 individuals.            

Disaggregation data elements:Help on this term
Data Element / Data SetPerson—area of usual residence, statistical area level 2 (SA2) code (ASGS 2016) N(9)
Data Source
AIHW National Perinatal Data Collection (NPDC)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Perinatal NMDS 2012-13

Perinatal NMDS 2013-14


Comments:Help on this term

Data elements are from the Perinatal national minimum data set (NMDS) or have been provided as voluntary non-standardised items by the states and territories. Records with data that are missing, not stated or not interpretable have been excluded from the denominator.

 

A birth is defined as the event in which a baby comes out of the uterus after a pregnancy of at least 20 weeks gestation or weighing 400 grams or more.

 

Births included are vaginal births, including non-instrumental and instrumental births. A non-instrumental vaginal birth is one in which the baby is born through the vagina without the assistance of instruments. An instrumental birth is a procedure that uses instruments (forceps or vacuum extraction) to assist the baby to come out through the vagina.

 

Births excluded are caesarean sections.

Postpartum perineal status is defined as:

1st degree laceration/vaginal graze (Code 2)—Graze, laceration, rupture or tear of the perineal skin during delivery that may be considered to be slight or that involves one or more of the following structures:

  • fourchette

  • labia

  • periurethral tissue (excluding involvement of urethra)

  • vagina

  • low vulva.

2nd degree laceration (Code 3)—Perineal laceration, rupture or tear as in Code 2 occurring during delivery, also involving:

  • pelvic floor

  • perineal muscles

  • vaginal muscles.

    Excludes laceration involving the anal sphincter.

3rd degree laceration (Code 4)—Perineal laceration, rupture or tear as in Code 3 occurring during delivery, also involving:

  • anal sphincter (excluding involvement of anal or rectal mucosa)

  • rectovaginal septum

  • sphincter not otherwise specified (NOS).

           Excludes laceration involving the anal or rectal mucosa.

 

4th degree laceration (Code 7)—Perineal laceration, rupture or tear as in Code 4 occurring during delivery, also involving:

  • anal mucosa

  • rectal mucosa

 

Representational attributes

Representation class:Help on this termRate
Data type:Help on this termInteger
Unit of measure:Help on this termPerson
Format:Help on this term

N[NNNN]

Data source attributes

Data sources:Help on this term
Data SourceAIHW National Perinatal Data Collection (NPDC)
Frequency
Calendar years ending 31 December each year
Data custodian

Australian Institute of Health and Welfare


Accountability attributes

Reporting requirements:Help on this term

Australian Commission on Safety and Quality in Health Care

Organisation responsible for providing data:Help on this term

Australian Institute of Health and Welfare

Accountability:Help on this term

Australian Commission on Safety and Quality in Health Care

Release date:Help on this term07/06/2017

Source and reference attributes

Submitting organisation:Help on this term

Australian Commission on Safety and Quality in Health Care

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