AIHW - Maternity Indicators - Episiotomy for Women having First Birth for Instrumental Vaginal Births (%) (SA3) 2014-2016

This dataset presents the footprint of the percentage of women who had an episiotomy when giving birth for the first time and giving birth vaginally and instrumentally, by the mother's usual residence. This has been calculated with the number of females having their first baby who had an episiotomy during an instrumental vaginal birth, divided by the number of females having their first baby who gave birth vaginally and had an instrumental vaginal birth, 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\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/690076)\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 * Included are those females who gave birth for the first time and had a vaginal birth, with or without instruments. Females who had a multiple birth are included if this was the first time they had given birth.\n\n * Excluded are those females who did not give birth for the first time or gave birth by caesarean section.\n\n * Instrumental vaginal birth means that the baby was delivered with the use of forceps or vacuum extraction.\n\n * Caution should be used when interpreting these results. There was no standardised collection across jurisdictions for the data used to derive this indicator.\n\n * For multiple births, the perineal status after the birth of the first-born baby was used.\n\n * From 2004 to 2013, a combined laceration and episiotomy value could be recorded; from 2014 onwards, episiotomy could be recorded separately.\n\n * Data were not available from Victoria for 2009.\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

本数据集呈现了首次分娩且经阴道助产（含器械助产）时接受会阴切开术的女性占比，按产妇常住地划分的分布情况。该占比的计算方式为：接受器械阴道分娩且首次分娩时实施会阴切开术的女性人数，除以首次分娩且经器械阴道助产的女性总人数，再乘以100。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）下的三级统计区域（Statistical Area Level 3, SA3）。

本数据集来源于全国围产期数据收集计划（National Perinatal Data Collection, NPDC），这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相关记录，填写每份分娩的上报表单。每年会将标准化的去标识化数据提取后提交至澳大利亚健康与福利研究所（Australian Institute of Health and Welfare, AIHW），以此构成NPDC数据集。

如需了解该数据集的更多信息，请访问：
* [澳大利亚健康与福利研究所——全国核心产科指标数据表](https://www.aihw.gov.au/reports/mothers-babies/ncmi-data-visualisations/data)
* [元数据在线注册表条目](https://meteor.aihw.gov.au/content/index.phtml/itemId/690076)

请注意：
* 澳大利亚城市与区域研究基础设施（Australian Urban Research Infrastructure Network, AURIN）已对原始数据完成空间化处理。
* 分娩被定义为：妊娠至少20周或胎儿体重达到400克及以上时，胎儿脱离母体子宫的事件。
* 纳入统计的对象为首次分娩且经阴道分娩（无论是否使用助产器械）的女性。若多胎妊娠为产妇首次分娩，则该产妇亦纳入统计范围。
* 排除对象为非首次分娩或经剖宫产分娩的女性。
* 器械阴道助产指借助产钳或负压吸引设备完成胎儿娩出的分娩方式。
* 解读本研究结果时需谨慎：该指标的数据源并未在各司法管辖区间实现标准化收集。
* 对于多胎妊娠，仅以第一胎分娩后的会阴状态作为统计依据。
* 2004年至2013年期间，会阴撕裂与会阴切开术的记录可合并上报；2014年起，二者可分别单独记录。
* 2009年无维多利亚州的相关数据。
* 产妇常住地的三级统计区域（SA3）数据采用2014-2016年的三年聚合数据。
* 按"分组依据"汇总的数值总和可能与澳大利亚全国总数值不一致。