Affiliation:
1. Department of Obstetrics and Gynecology Columbia University Irving Medical Center New York New York USA
2. Department of Obstetrics, Gynecology, and Reproductive Sciences University of California‐San Francisco San Francisco California USA
Abstract
AbstractObjectiveTo analyse trends, risk factors and adverse outcomes associated with antenatal pyelonephritis hospitalisations.DesignRetrospective cohort.SettingA national sample of US delivery hospitalisations with associated antenatal hospitalisations.PopulationUS delivery hospitalisations in the Nationwide Readmissions Database from 2010 to 2020.MethodsAntenatal hospitalisations with a pyelonephritis diagnosis within the 9 months before delivery hospitalisation were analysed. Clinical, demographic and hospital risk factors associated with antenatal pyelonephritis hospitalisations were analysed with unadjusted and adjusted logistic regression models with unadjusted and adjusted odds ratios as measures of effect. Temporal trends in antenatal pyelonephritis hospitalisations were analysed with Joinpoint regression to determine the relative measure of average annual percent change (AAPC). Risk for severe maternal morbidity and sepsis during antenatal pyelonephritis hospitalisations was similarly analysed with Joinpoint regression.ResultsOf an estimated 10.2 million delivery hospitalisations, 49 140 (0.48%) had an associated antenatal pyelonephritis hospitalisation. The proportion of deliveries with a preceding antenatal pyelonephritis hospitalisation decreased by 29% from 0.56% in 2010 to 0.40% in 2020 (AAPC −2.9%, 95% CI −4.0% to −1.9%). Antenatal pyelonephritis decreased, but risk for sepsis diagnoses increased during these hospitalisations from 3.7% in 2010 to 18.0% in 2020 (AAPC 17.2%, 95% CI 14.2%–21.1%). Similarly, risk for severe morbidity increased from 2.6% in 2010 to 4.4% in 2020 (AAPC 5.5%, 95% CI 0.8%–10.7%).ConclusionAntenatal pyelonephritis admissions appear to be decreasing in the USA. However, these hospitalisations are associated with a rising risk for sepsis and severe maternal morbidity.
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