National Core Maternity Indicators: PI 07—Normal (non-instrumental) vaginal birth for selected women giving birth for the first time (2016)

Identifying and definitional attributes

Metadata item type:Indicator
Indicator type:Indicator
Common name:

Normal (non-instrumental) vaginal birth for selected women giving birth for the first time.

Short name:PI 07—Normal (non-instrumental) vaginal birth for selected women giving birth for the first time (2016)
METeOR identifier:613186
Registration status:Health, Superseded 06/09/2018
Description:

The proportion of women who gave birth for the first time and who met the selection criteria*, who gave birth vaginally without instrumental assistance.

Rationale:

This indicator is used to benchmark practice.

Indicator set:National Core Maternity Indicators (2016) Health, Superseded 06/09/2018

Collection and usage attributes

Population group age from:

20 years

Population group age to:

34 years

Computation description:

The proportion of women who gave birth for the first time and who met the selection criteria*, who gave birth vaginally without instrumental assistance.

* Selection criteria: Women included are those who gave birth for the first time and met all of the following criteria:

  • aged between 20 and 34 years
  • gestational age at birth between 37 and 41 completed weeks
  • pregnancy has one baby only (singleton)
  • the presentation of the baby is vertex (baby's head was at the cervix).

Excluded are those women who have given birth prior to the current birth or who did not meet the selection criteria.

Computation:

100 × (Numerator ÷ Denominator)

Numerator:

Number of selected women who had a non-instrumental vaginal birth.

Numerator data elements:
Data Element / Data SetBirth event—birth method, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetBirth event—birth plurality, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetProduct of conception—gestational age, completed weeks N[N]
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetFemale—parity, total pregnancies N[N]
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


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

Data source type: Administrative by-product data


Data Element / Data SetBirth event—birth presentation, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Denominator:

All selected women.

Denominator data elements:
Data Element / Data SetPerson—date of birth, DDMMYYYY
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetBirth event—birth plurality, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetProduct of conception—gestational age, completed weeks N[N]
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetBirth event—birth presentation, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetFemale—parity, total pregnancies N[N]
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Disaggregation:
  • Year of birth
  • State or territory of birth
  • Hospital annual number of births
  • Remoteness category (from mother's area of usual residence)
  • Indigenous status of mother
  • Hospital sector
  • Patient elected accommodation status
Disaggregation data elements:
Data Element / Data SetBirth event—state/territory of birth, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetPerson—Indigenous status, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Guide for use

Data source type: Administrative by-product data


Data Element / Data SetEpisode of admitted patient care—patient election status, code N
Data Source
AIHW National Perinatal Data Collection (NPDC)
Data Element / Data SetPerson—date of birth, DDMMYYYY
Data Source
AIHW National Perinatal Data Collection (NPDC)
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, geographical location code (ASGC 2011) NNNNN
Data Source
AIHW National Perinatal Data Collection (NPDC)
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)
Comments:

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 gestational age or weighing 400 grams or more.

A non-instrumental vaginal birth is one in which the baby is born through the vagina without the assistance of instruments.

Patient elected accommodation status is available for all jurisdictions from 2006.

Source of definition: Australian Council of Healthcare Standards (ACHS) Indicator 1.1: Selected women giving birth for the first time who have a spontaneous vaginal birth. The ACHS defines a spontaneous vaginal birth as a vaginal birth, regardless of onset of labour, which is not assisted by forceps or vacuum and is not a vaginal breech delivery. This ACHS indicator is based on the definition by Women's Healthcare Australasia (WHA) Core Maternity Indicators Project (CMIP).

Representational attributes

Representation class:Percentage
Data type:Real
Unit of measure:Person
Format:

N[NN.N]

Data source attributes

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

Australian Institute of Health and Welfare


Relational attributes

Related metadata references:

Supersedes National Core Maternity Indicators: PI 07-Normal (non-instrumental) vaginal birth for selected women giving birth for the first time (2013) Health, Superseded 02/02/2016

Has been superseded by National Core Maternity Indicators: PI 07–Non-instrumental vaginal birth for selected females giving birth for the first time, 2018 Health, Superseded 19/06/2019