National Core Maternity Indicators: PI 10–Small babies among births at or after 40 weeks gestation, 2019

Identifying and definitional attributes

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

Small babies among births at or after 40 weeks gestation

Short name:PI 10–Small babies among births at or after 40 weeks gestation, 2019
METeOR identifier:717546
Registration status:Health, Standard 19/06/2019
Description:

The proportion of babies born at or after 40 weeks gestation who weighed less than 2,750 grams at birth.

Rationale:

This indicator aims to identify intrauterine growth restriction for babies born at or after 40 weeks gestation. This indicator is used to benchmark practice.

Indicator set:National Core Maternity Indicators, 2019 Health, Standard 19/06/2019

Collection and usage attributes

Computation description:

The number of babies born at or after 40 weeks gestation who weighed less than 2,750 grams at birth, divided by the number of babies born at or after 40 weeks gestation, 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.

Births included are those for babies born at or after 40 weeks gestation. This includes stillborn babies and babies from a multiple birth.

Births excluded are those for babies born before 40 completed weeks gestational age, that is before 40 weeks and 0 (zero) days.

Gestational age is reported as completed weeks.

Computation:

100 × (Numerator ÷ Denominator)

Numerator:

The number of babies born at or after 40 weeks gestation who weighed less than 2,750 grams at birth.

Numerator data elements:
Data Element / Data SetBirth—birth weight, total grams NNNN
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 SetProduct of conception—gestational age, completed weeks 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


Denominator:

The number of babies born at or after 40 weeks gestation.

Denominator data elements:
Data Element / Data SetProduct of conception—gestational age, completed weeks 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


Disaggregation:
  • Year of birth
  • State or territory of birth
  • Mother's age at birth
  • Hospital annual number of births
  • Hospital sector
  • Mother's smoking status during pregnancy
  • Remoteness category (from mother's area of usual residence)
  • Disadvantage quintile (from mother's area of usual residence)
  • Mother's country of birth
  • Indigenous status of mother
  • Sex of baby
  • Primary Health Network (from mother's area of usual residence)
  • Statistical local area 3 (from mother's area of usual residence)
Disaggregation data elements:
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 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 SetPerson—sex, 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 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 SetData Element

Hospital sector


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

Data source type: Administrative by-product data


Data Element / Data SetData Element

Smoking status during pregnancy


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

 Data source type: Administrative by-product data


Data Element / Data SetPerson—country of birth, code (SACC 2016) NNNN
Data Source
Perinatal National Minimum Data Set (NMDS)
NMDS / DSS
Perinatal NMDS 2014-18
Guide for use

 Data source type: Administrative by-product data


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.

Modified from Australian Council on Healthcare Standards (ACHS) Indicator 8.1: Babies with severe intrauterine growth restriction. This ACHS indicator is based on the definition by Women's Healthcare Australasia Core Maternity Indicators Project (WHA 2007).

Representational attributes

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

N[NN.N]

Data source attributes

Data sources:
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:

Australian Institute of Health and Welfare

Reference documents:

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:

Supersedes National Core Maternity Indicators: PI 10–Small babies among births at or after 40 weeks gestation, 2018 Health, Superseded 19/06/2019