Sex differences in acute kidney injury requiring dialysis
2018
Female sex has been included as a risk factor in models developed to predict the risk of
acute kidney injury(AKI) associated with cardiac surgery, aminoglycoside nephrotoxicity and
contrast-induced nephropathy. The commentary acompanying the Kidney Disease Improving Global Outcomes Clinical Practice Guideline for
Acute Kidney Injuryconcludes that female sex is a shared susceptibility factor for
acute kidney injurybased on observations that female sex is associated with the development of hospital-acquired
acute kidney injury. In contrast, female sex is reno-protective in animal models. In this context, we sought to examine the role of sex in hospital-associated
acute kidney injuryin greater detail. We utilized the Hospital Episode
Statistics databaseto calculate the sex-stratified incidence of AKI requiring
renal replacement therapy(AKI-D) among 194,157,726 hospital discharges reported for the years 1998–2013. In addition, we conducted a systematic review of the English literature to evaluate dialysis practices among men versus women with AKI. Hospitalized men were more likely to develop AKI-D than hospitalized women (OR 2.19 (2.15, 2.22) p < 0.0001). We found no evidence in the published literature that dialysis practices differ between men and women with AKI. Based on a population of hospitalized patients which is more than 3 times larger than all previously published cohorts reporting sex-stratified AKI data combined, we conclude that male sex is associated with an increased incidence of hospital-associated AKI-D. Our study is among the first reports to highlight the protective role of female gender in AKI.
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