AIHW - Maternity Indicators - Non-instrumental Vaginal Birth for Selected Women Giving Birth for the First Time (%) (SA3) 2014-2016

This dataset presents the footprint of the percentage of selected women giving birth for the first time who gave birth by non-instrumental vaginal birth, by the mother's usual residence. This has been calculated with the number of selected females giving birth for the first time who gave birth by non-instrumental vaginal birth, divided by all selected females, and multiplied by 100. The data spans the years of 2014-2016 and is aggregated to Statistical Area Level 3 (SA3) geographic areas from the 2011 Australian Statistical Geography Standard (ASGS).\n\nWomen included are those who gave birth for the first time and met all of the following criteria:\n\n * Aged between 20 and 34.\n\n * Gestational age at birth between 37 and 41 completed weeks.\n\n * Pregnancy has one baby only (singleton).\n\n * The presentation of the baby is vertex (baby's head was at the cervix).\n\nThe data is sourced from the National Perinatal Data Collection (NPDC), which is a national population-based cross-sectional collection of data on pregnancy and childbirth. The data are based on births reported to the perinatal data collection in each state and territory in Australia. Midwives and other birth attendants, using information obtained from mothers and from hospital or other records, complete notification forms for each birth. A standard de-identified extract is provided to the Australian Institute of Health and Welfare (AIHW) on an annual basis to form the NPDC.\n\nFor further information about this dataset, please visit:\n\n * [Australian Institute of Health and Welfare - National Core Maternity Indicators Data Tables.](https://www.aihw.gov.au/reports/mothers-babies/ncmi-data-visualisations/data)\n\n * [Metadata Online Registry Entry.](https://meteor.aihw.gov.au/content/index.phtml/itemId/690125)\n\nPlease note:\n\n * AURIN has spatially enabled the original data.\n\n * 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.\n\n * A non-instrumental vaginal birth is one in which the baby is born through the vagina without the assistance of instruments (vacuum or forceps).\n\n * Non-instrumental vaginal births include spontaneous vaginal and vaginal breech.\n\n * Data for selected women criteria, parity, were not available from Victoria for 2009.\n\n * Data for Tasmania from 2004 to 2012 were not available. For Tasmania from 2005 to 2012, presentations via caesarean births were not reported by hospitals still using paper-based form. Where a caesarean section occurred the presentation was recorded as ‘Not stated’. Presentations via caesarean births were included in the paper-based form from 1 January 2013. The year 2004 was not included in this analysis.\n\n * Data for Statistical Local Area Level 3 (SA3) of mother's usual residence reported using a 3-year aggregate, 2014-2016.\n\n * The sum of the reported 'Grouped by' values may not equal the Australia total.\n

本数据集呈现了按产妇常住地划分的、首次分娩且采用非器械阴道分娩的女性占比情况。该占比通过「首次分娩且采用非器械阴道分娩的目标女性人数」除以所有目标女性人数，再乘以100计算得到。数据覆盖2014-2016年，聚合自2011年澳大利亚统计地理标准（Australian Statistical Geography Standard, ASGS）下的统计区域三级（Statistical Area Level 3, SA3）地理单元。

纳入研究的女性需满足以下全部标准：

* 年龄介于20至34岁之间。

* 分娩时孕周为37至41整周。

* 为单胎妊娠。

* 胎儿胎位为头位（胎儿头部朝向宫颈口）。

本数据集源自全国围产期数据收集计划（National Perinatal Data Collection, NPDC），该计划是一项基于全国人口的妊娠与分娩横断面数据收集项目。数据基于澳大利亚各州及领地上报至围产期数据收集系统的分娩记录。助产士及其他接生人员会依据产妇提供的信息以及医院或其他医疗记录，填写每份分娩的通知表格。每年会将标准化的去标识化数据提取后提交至澳大利亚卫生与福利研究所（Australian Institute of Health and Welfare, AIHW），以此组成NPDC数据集。

如需了解本数据集的更多信息，请访问：

* [澳大利亚卫生与福利研究所——全国核心产科指标数据表](https://www.aihw.gov.au/reports/mothers-babies/ncmi-data-visualisations/data)

* [元数据在线注册条目](https://meteor.aihw.gov.au/content/index.phtml/itemId/690125)

请注意：

* AURIN已为原始数据启用空间可视化功能。

* 分娩的定义为：妊娠至少20周或胎儿体重达400克及以上时，胎儿从子宫娩出的事件。

* 非器械阴道分娩指无需借助器械（真空吸引器或产钳）辅助、通过阴道娩出胎儿的分娩方式。

* 非器械阴道分娩包括自然阴道分娩及臀位阴道分娩。

* 2009年维多利亚州无法提供符合目标女性筛选标准及产次相关的数据。

* 2004年至2012年塔斯马尼亚州的相关数据不可用。其中2005年至2012年期间，仍使用纸质表单的医院未上报剖宫产分娩的胎位信息，此类剖宫产的胎位会被记录为「未说明」。自2013年1月1日起，剖宫产胎位信息可通过纸质表单上报。本分析未纳入2004年的数据。

* 产妇常住地的统计区域三级（SA3）数据采用2014-2016年三年聚合的方式统计。

* 按「分组依据」汇总的报告值总和可能与澳大利亚全国总数值不完全一致。