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Background <p>COVID-19-associated AKI has received attention for some time because of its association with mortality, but has not been investigated in Japan. Diabetes mellitus, male sex, aging, etc., have been reported as risk factors for the development of AKI, and recently, it has been reported that unvaccinated status is a risk factor. AKI is thought to be related to inflammation and microthrombi caused by cytokine storms and lung‒kidney connections. The COVID-19 vaccine has the potential to prevent AKI because it lowers cytokine levels and prevents severe disease.</p> Methods <p>A retrospective cohort study collected clinical and laboratory data from patients admitted to the Tokyo Metropolitan Institute for Geriatrics and Gerontology with a COVID-19 diagnosis between February 2020 and September 2022.</p> Results <p>Among the 929 patients, 113 (12.2%) had AKI, 33 (3.6%) died, and the mortality rate of patients with AKI was 19.5%, which was significantly higher than that of patients without AKI (1.3%) (<i>p</i> &lt; 0.001). Diabetes mellitus, unvaccinated status, and heart disease were associated with AKI complications (<i>p</i> = 0.001, 0.008, and 0.011, respectively).</p> Conclusions <p>COVID-19-associated AKI significantly increased mortality in Japanese hospitalized patients. Unvaccinated status emerged as an independent risk factor for AKI, in addition to traditional risk factors such as diabetes mellitus and heart disease. These findings suggest a potential protective role of vaccination against COVID-19-associated AKI.</p>

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Impact of vaccination on the development of acute kidney injury in Japanese COVID-19 patients: a retrospective observational analysis

  • 期刊论文

  • 发表日期：

    2025年7月30日

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  • Kenta Taito,
  • Masatoshi Oka,
  • Hikaru Sugimoto,
  • Haruto Fukagawa,
  • Ayano Izawa,
  • Takaaki Tsuchiya,
  • Shiho Matsuno,
  • Noriko Yamanaka,
  • Wako Yumura,
  • Noriyuki Suzuki,
  • Mitsuyo Itabashi,
  • Takashi Takei

摘要

Background

COVID-19-associated AKI has received attention for some time because of its association with mortality, but has not been investigated in Japan. Diabetes mellitus, male sex, aging, etc., have been reported as risk factors for the development of AKI, and recently, it has been reported that unvaccinated status is a risk factor. AKI is thought to be related to inflammation and microthrombi caused by cytokine storms and lung‒kidney connections. The COVID-19 vaccine has the potential to prevent AKI because it lowers cytokine levels and prevents severe disease.

Methods

A retrospective cohort study collected clinical and laboratory data from patients admitted to the Tokyo Metropolitan Institute for Geriatrics and Gerontology with a COVID-19 diagnosis between February 2020 and September 2022.

Results

Among the 929 patients, 113 (12.2%) had AKI, 33 (3.6%) died, and the mortality rate of patients with AKI was 19.5%, which was significantly higher than that of patients without AKI (1.3%) (p < 0.001). Diabetes mellitus, unvaccinated status, and heart disease were associated with AKI complications (p = 0.001, 0.008, and 0.011, respectively).

Conclusions

COVID-19-associated AKI significantly increased mortality in Japanese hospitalized patients. Unvaccinated status emerged as an independent risk factor for AKI, in addition to traditional risk factors such as diabetes mellitus and heart disease. These findings suggest a potential protective role of vaccination against COVID-19-associated AKI.