Temporal trends in the incidence of and associations between the risk factors for obstetrical anal sphincter injuries

BackgroundObstetrical anal sphincter injuries are an important complication of vaginal deliveries that may result in short- and long-term pelvic floor morbidity a diminished quality life young, healthy women. The prevalence obstetrical ranges from 0.1% to 8.7%. Over recent years, there seems be trend increasing occurrence worldwide. It is unclear why the rates rising. Previous studies have examined effect different risk factors on injuries. change incidence some for can partially explain overall increase There no previous study explored impact changes individual over time injuries.ObjectiveThe main aim this was examine temporal trends odds ratio major known associated with period 1988 2016.Study DesignThis retrospective cohort included all women who underwent between 2016 at tertiary university medical center. intervals were divided into 4 periods (1988–1997, 1998–2007, 2008–2016, total 2016) each factor calculated period. Correlation models regression analysis performed association time. Furthermore, ratios evaluated using multivariate which primiparous separated multiparous women.ResultsDuring period, 295,668 deliveries. Of these, 591 diagnosed (0.2%). significant (P<.05) multivariable following: primiparity, birth after cesarean delivery, vacuum extraction, birthweight >4 kg. following factors: extraction. No found In addition, we strengthening delivery macrosomia injuries, as opposed decline relative contribution extraction Moreover, among increased 7-fold but unchanged women.ConclusionWe shown A better understanding specific explain, part, worldwide detrimental birth. Obstetrical 2016. This During We