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National Core Maternity Indicators: PI 15–Females having their second birth vaginally whose first birth was by caesarean section, 2018

Identifying and definitional attributes

Metadata item type:Help on this termIndicator
Indicator type:Help on this termIndicator
Common name:Help on this term

Females having their second birth vaginally whose first birth was by caesarean section

Short name:Help on this termPI 15–Females having their second birth vaginally whose first birth was by caesarean section, 2018
METeOR identifier:Help on this term690174
Registration status:Help on this termHealth, Standard 06/09/2018
Description:Help on this term

The proportion of all females having their second birth vaginally whose first birth was by caesarean section.

Rationale:Help on this term

The indicator is used to benchmark practice for vaginal birth following caesarean section.

Indicator set:Help on this termNational Core Maternity Indicators, 2018 Health, Standard 06/09/2018

Collection and usage attributes

Computation description:Help on this term

The number of females having their second birth vaginally whose first birth was by caesarean section, divided by the number of females having their second birth whose first birth was by caesarean section, and multiplied by 100.

A birth is defined as an 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.

Included are those females who are having a singleton for their second birth and whose first birth was by caesarean section.

Excluded are those females whose second birth is a multiple birth, those who are not having their second birth, and those who are having their second birth and whose first birth was a vaginal birth.

Computation:Help on this term

100 × (Numerator ÷ Denominator)

Numerator:Help on this term

The number of females having their second birth vaginally whose first birth was by caesarean section.

Numerator data elements:Help on this term
Data Element / Data SetFemale—parity, total pregnancies N[N]
Data Source
Perinatal National Minimum Data Set (NMDS)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Data source type: Administrative by-product data


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

Data source type: Administrative by-product data


Data Element / Data SetFemale—caesarean section at most recent previous birth indicator, code N
Data Source
Perinatal National Minimum Data Set (NMDS)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

This data item was used for 2014 onwards analysis.

Data source type: Administrative by-product data.


Data Element / Data SetFemale—caesarean section indicator (last previous birth) code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

This data item was used for 2007-2013 analysis.

Data source type: Administrative by-product data.


Denominator:Help on this term

The number of females having their second birth whose first birth was by caesarean section.

Denominator data elements:Help on this term
Data Element / Data SetFemale—parity, total pregnancies N[N]
Data Source
Perinatal National Minimum Data Set (NMDS)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetFemale—caesarean section at most recent previous birth indicator, code N
Data Source
Perinatal National Minimum Data Set (NMDS)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

This data item was used for 2014 onwards analysis.

Data source type: Administrative by-product data.


Data Element / Data SetFemale—caesarean section indicator (last previous birth) code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

This data item was used for 2007-2013 analysis.

Data source type: Administrative by-product data.


Disaggregation:Help on this term
  • Year of birth
  • State or territory of birth
  • Mother's age at birth
  • Hospital annual number of births
  • Hospital sector
  • Remoteness category (from mother's area of usual residence)
  • Indigenous status of mother
  • Primary Health Network (from mother's area of usual residence)
  • Statistical local area 3 (from mother's area of usual residence)
Disaggregation data elements:Help on this term
Data Element / Data SetPerson—Indigenous status, code N
Data Source
Perinatal National Minimum Data Set (NMDS)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Data source type: Administrative by-product data


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

Data source type: Administrative by-product data


Data Element / Data SetData Element

Hospital annual number of births


Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetPerson—area of usual residence, statistical area level 2 (SA2) code (ASGS 2016) N(9)
Data Source
Perinatal National Minimum Data Set (NMDS)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetBirth event—state/territory of birth, code N
Data Source
Perinatal National Minimum Data Set (NMDS)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetData Element

Hospital sector


Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


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.

From 2014, Female—caesarean section at most recent previous birth indicator, code N data item was introduced into the Perinatal NMDS. Although not an NMDS/DSS item prior to 2014, data items appear to match the data element developed by NPDDC, Female—caesarean section indicator (last previous birth) code N. As a result, data from Victoria were not available in 2007 to 2009, and Western Australia in 2013.  

Modified from Australian Council on Healthcare Standards (ACHS) Indicator 2.1: Vaginal birth following caesarean section. This ACHS indicator is based on the definition by Women's Healthcare Australasia Core Maternity Indicators Project (WHA 2007).

Representational attributes

Representation class:Help on this termPercentage
Data type:Help on this termReal
Unit of measure:Help on this termPerson
Format:Help on this term

N[NN.N]

Data source attributes

Data sources:Help on this term
Data SourcePerinatal National Minimum Data Set (NMDS)
Frequency
Annual
Data custodian

Australian Institute of Health and Welfare



Data SourceAIHW National Perinatal Data Collection (NPDC)
Frequency
Calendar years ending 31 December each year
Data custodian

Australian Institute of Health and Welfare


Source and reference attributes

Submitting organisation:Help on this term

Australian Institute of Health and Welfare

Reference documents:Help on this term

ACHS (The Australian Council on Healthcare Standards, Health Services Research Group, University of Newcastle) 2014. The Australasian Clinical Indicator Report: 2006-2013. 15th edn. Sydney: ACHS. Viewed 9 April 2018, https://www.achs.org.au/media/88679/clinical_indicator_report_2006_2013.pdf.

WHA (Women's Healthcare Australasia) 2007. Supporting excellence in maternity care: the core maternity indicators project: findings from the core maternity indicators project. Canberra: WHA.

Relational attributes

Related metadata references:Help on this term

Supersedes National Core Maternity Indicators: PI 15—Women having their second birth vaginally whose first birth was by caesarean section (2016) Health, Superseded 06/09/2018

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