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- Title
Association of iron deficiency with kidney outcome and all-cause mortality in chronic kidney disease patients without anemia.
- Authors
Yu, Hongxue; Shao, Xian; Guo, Zhixin; Pang, Mingzhen; Chen, Shan; She, Caoxiang; Cao, Lisha; Luo, Fan; Chen, Ruixuan; Zhou, Shiyu; Xu, Xin; Nie, Sheng
- Abstract
Background: Iron deficiency is prevalent in patients with chronic kidney disease (CKD), even in those without anemia. However, the effects of iron deficiency on CKD progression and all-cause mortality in non-dialysis-dependent CKD (NDD-CKD) patients without anemia remain incompletely understood. Methods: This multicenter retrospective nationwide cohort study included adult patients with non-anemia NDD-CKD from 24 hospitals across China. The study investigated the associations between serum ferritin or transferrin saturation (TSAT) levels and the risks of CKD progression and all-cause mortality. Results: Among 18,878 patients with NDD-CKD, 9,989 patients were included in the kidney outcome analysis, and 18,481 patients in the all-cause mortality analysis. Of the patients with the measurement, 2,450 (27.2%) had ferritin levels ≤ 100ng/mL and 2,440 (13.1%) had a TSAT level ≤ 20%. Compared with patients with TSAT level of > 20%, those with TSAT level of ≤ 20% had significantly higher risks of CKD progression (adjusted hazard ratio [aHR]: 1.66, 95% confidence intervals [CI]: 1.16–2.37; P = 0.005) and all-cause mortality (aHR: 2.21, 95% CI: 1.36–3.57; P = 0.001). The robustness of results was supported by subgroup analyses. However, there was no significant association found between ferritin levels and the risk of CKD progression or all-cause mortality (P > 0.05). Conclusion: Iron deficiency was prevalent in NDD-CKD patients without anemia, and TSAT could be a modifiable risk factor of CKD progression and all-cause mortality. The screening of iron biomarkers, especially TSAT, in the early stage of NDD-CKD is important to assess and improve prognosis.
- Subjects
CHINA; IRON deficiency; CHRONIC kidney failure; HYPERFERRITINEMIA; IRON in the body; MORTALITY; DISEASE risk factors
- Publication
Nutrition Journal, 2025, Vol 24, Issue 1, p1
- ISSN
1475-2891
- Publication type
Academic Journal
- DOI
10.1186/s12937-025-01072-1