National Core Maternity Indicators: PI 08–Instrumental vaginal birth for selected females giving birth for the first time, 2019
Identifying and definitional attributes
|Metadata item type:||Indicator|
Instrumental vaginal birth for selected females giving birth for the first time
|Short name:||PI 08–Instrumental vaginal birth for selected females giving birth for the first time, 2019|
|Registration status:||Health, Standard 19/06/2019|
The proportion of selected females giving birth for the first time who gave birth by instrumental vaginal birth.
This indicator is used to benchmark practice.
|Indicator set:||National Core Maternity Indicators, 2019 Health, Standard 19/06/2019|
Collection and usage attributes
|Population group age from:|
|Population group age to:|
The number of selected females giving birth for the first time who gave birth by instrumental vaginal birth, divided by all selected females, and multiplied by 100.
Selected females criteria: Females included are those who gave birth for the first time and met all of the following criteria:
Excluded are those females who have given birth prior to the current birth or did not meet the selected females criteria.
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.
Gestational age is a clinical measure of the duration of the pregnancy. For the National Perinatal Data Collection gestational age is reported as completed weeks.
An instrumental birth is a procedure that uses instruments (forceps or vacuum extraction) to assist the baby to come out through the vagina.
100 × (Numerator ÷ Denominator)
The number of selected females giving birth for the first time who gave birth by instrumental vaginal birth.
|Numerator data elements:|
All selected females.
|Denominator data elements:|
|Disaggregation data elements:|
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.
For Tasmania from 2005 to 2012, presentations via caesarean births were not reported by hospital still using paper-based form. Where a caesarean section occurred the presentation was recorded as 'Not stated'. Presentations via caesarean births was included in the paper-based form from 1 January 2013. As a result, Tasmania can only be reported 2013 onwards for selected females. The year 2004 was not included in this analysis as trend for after this year could not be undertaken due to the above issue.
Data for parity, a criteria to selected females, were not available from Victoria in 2009.
Patient election status is available for all jurisdictions from 2006.
Source of definition: Australian Council on Healthcare Standards (ACHS) Indicator 1.3: Selected women giving birth for the first time who undergo an instrumental birth. The ACHS define an instrumental birth as the use of forceps or vacuum. This ACHS indicator is based on the definition by Women's Healthcare Australasia Core Maternity Indicators Project (WHA 2007).
|Unit of measure:||Person|
Data source attributes
Source and reference attributes
Australian Institute of Health and Welfare
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.
|Related metadata references:|
Supersedes National Core Maternity Indicators: PI 08–Instrumental vaginal birth for selected females giving birth for the first time, 2018 Health, Superseded 19/06/2019
Has been superseded by National Core Maternity Indicators: PI 08–Instrumental vaginal birth for selected females giving birth for the first time, 2020 Health, Standard 16/09/2020