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The aim of this study was to investigate the association between dose reduction of renin-angiotensin-aldosterone system inhibitors (RAASis) and Acute kidney injury (AKI). AKI, which is commonly observed in hospitalized patients, increases mortality. Although RAASis and coronary artery angiography (CAG) are reported to be risk factors for AKI, whether dose reduction of RAASis can prevent AKI after CAG remains unknown. In this retrospective propensity score (PS)-matched cohort from the RWD database, which includes 20 million patients from 190 hospitals in Japan, we examined the impact of dose reduction of RAASis on the development of AKI after CAG. The subjects were patients with an estimated glomerular filtration rate (eGFR) of 15–60 mL/min/1.73 m 2 , and the exposure of interest was the presence of a dose reduction in RAASis within 3 days before CAG was performed. Propensity score matching was performed with 19 baseline characteristics using a logistic regression model. We identified 3329 patients who were prescribed RAASis at least one month before admission and underwent CAG. Six hundred seventy-four patients had a dose reduction 3 days prior to undergoing CAG, and 2655 patients did not. AKI was observed in 34 (5.0%) patients in the reduction group and 137 (5.2%) patients in the control group. There was no significant difference in the primary outcome between the two groups in the PS-matched cohort (OR: 1.08, 95% CI: 0.70–1.66). A reduction in the dose of RAASis did not prevent the development of AKI among patients undergoing CAG.

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Association between dose reduction of renin-angiotensin-aldosterone system inhibitors before coronary artery angiography and acute kidney injury: a propensity score-matched study