National Core Maternity Indicators: PI 10–Small babies among births at or after 40 weeks gestation, 2021

Collection and usage attributes

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 the complete expulsion or extraction from a female, of a product of conception of 20 or more completed weeks of gestation or of 400 grams or more birthweight.

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.

100 × (Numerator ÷ Denominator)

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

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

• 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)

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 a permissible value have been included in 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

N[NN.N]

Data source attributes

Source and reference attributes

Australian Institute of Health and Welfare

ACHS (The Australian Council on Healthcare Standards) 2020. The Australasian Clinical Indicator Report: 2012-2019. 21st edn. Sydney: ACHS. Viewed 11 November 2021, https://www.achs.org.au/our-services/pos/previous-acir-publications.

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