干旱区生态环境知识资源中心(Arid): Association between second stage of labour length and risk of obstetrical anal sphincter injury in nulliparous women: a population-based retrospective cohort study

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DOI	10.1007/s00192-021-05070-9
	Association between second stage of labour length and risk of obstetrical anal sphincter injury in nulliparous women: a population-based retrospective cohort study
	Stairs, Jocelyn; Brown, Mary Margaret; Smith, Anita; Woolcott, Christy
通讯作者	Stairs, J
来源期刊	INTERNATIONAL UROGYNECOLOGY JOURNAL
ISSN	0937-3462
EISSN	1433-3023
出版年	2022
英文摘要	Introduction and hypothesis Obstetrical anal sphincter injury (OASIS) is a common consequence of vaginal delivery in nulliparas and carries the risk of short- and long-term morbidity. The objective of this study was to estimate the association between the duration of the second stage of labour and OASIS risk. Methods A population-based, retrospective cohort of nulliparas delivering singleton, vertex, non-anomalous fetuses at term in Nova Scotia, Canada, from 2005 to 2019, were identified using the Nova Scotia Atlee Perinatal Database. Poisson regression models were used to estimate risk ratios (RR) with robust 95% confidence intervals (CI) adjusting for confounding variables to investigate the association between the length of the second stage and OASIS in the entire cohort and in operative vaginal deliveries. Results Of 36,662 participants, 7.6% sustained an OASIS (6.8% third-degree, 0.8% fourth-degree tear). The proportion of participants who sustained an OASIS increased over the study period. For each 30-min increase in the length of second stage, the OASIS risk increased by 11% (RR 1.11, 95% CI 1.10-1.12). When stratified by mode of delivery, second stage length >= 90 min was associated with an increased OASIS risk in spontaneous (RR 1.35, 95% CI 1.15-1.58) and vacuum-assisted vaginal deliveries (RR 1.42, 95% CI 1.11-1.81). In forceps-assisted vaginal deliveries, OASIS risk was increased, with shorter and longer durations of the second stage. Conclusion Increasing length of the second stage of labour was associated with increasing risk of OASIS overall, but the association was heterogeneous between modes of delivery. Length of the second stage should be considered in counseling about OASIS risk.
英文关键词	Obstetrical anal sphincter injury Second stage of labour Nullipara Operative vaginal delivery
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000741900100001
WOS关键词	PROLONGED 2ND-STAGE ; PERINATAL OUTCOMES ; TERM ; PREVENTION ; DURATION ; TRENDS ; OASIS
WOS类目	Obstetrics & Gynecology ; Urology & Nephrology
WOS研究方向	Obstetrics & Gynecology ; Urology & Nephrology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377148
推荐引用方式 GB/T 7714	Stairs, Jocelyn,Brown, Mary Margaret,Smith, Anita,et al. Association between second stage of labour length and risk of obstetrical anal sphincter injury in nulliparous women: a population-based retrospective cohort study[J],2022.
APA	Stairs, Jocelyn,Brown, Mary Margaret,Smith, Anita,&Woolcott, Christy.(2022).Association between second stage of labour length and risk of obstetrical anal sphincter injury in nulliparous women: a population-based retrospective cohort study.INTERNATIONAL UROGYNECOLOGY JOURNAL.
MLA	Stairs, Jocelyn,et al."Association between second stage of labour length and risk of obstetrical anal sphincter injury in nulliparous women: a population-based retrospective cohort study".INTERNATIONAL UROGYNECOLOGY JOURNAL (2022).