Abstract
The optimal blood pressure (BP) in patients with chronic kidney disease (CKD) remains uncertain. Therefore, this cohort study aimed to investigate the prognostic value of ambulatory blood pressure (ABP) in patients with CKD and to determine the optimal range for ABP. In total, 1051 hospitalized patients with CKD were enrolled. The prognosis of patients with CKD was evaluated in terms of all-cause death, cardiovascular death, cardiovascular events, and renal events. Our results showed that systolic blood pressure (SBP) had a higher predictive value than diastolic blood pressure in the multivariate-adjusted models. Additionally, nighttime SBP was found to be the best predictor of prognosis in patients with CKD. Furthermore, when dividing the nighttime SBP into quartiles (quartile 1: <110 mmHg, quartile 2: 110–124 mmHg, quartile 3:124–139 mmHg, and quartile 4: ≥139 mmHg). Nighttime SBP ≥ 124 mmHg had an impact on prognosis in patients with CKD, nighttime SBP 124–139 mmHg: total mortality (hazard ratio [HR], 3.017 [95% confidence interval (CI): 1.367–6.660]), cardiovascular death (HR, 2.570 [95% CI, 1.744–6.151]), all cardiovascular events (HR, 2.401 [95% CI, 1.288–4.475]), and 110–124 mmHg had an impact on the renal prognosis (HR, 1.975 [95% CI, 1.311–2.976]). Therefore, nighttime SBP is an independent risk factor for CKD and a significant predictor of prognosis in patients with CKD. Furthermore, the prognosis of patients with CKD improved when the nighttime SBP was maintained below 124 mmHg; however, maintaining it below 110 mmHg can further lower the incidence of renal disease.

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Acknowledgements
The authors would like to acknowledge all patients and their families for participating in this study. The study was supported by China Chronic Kidney Disease Management Innovation Program (202206080010), Guangdong Basic and Applied Basic Research Fund Enterprise Joint Fund (Provincial enterprise joint Fund) (2021B1515230005), and Special Project of National Natural Science Foundation of China of the Third Affiliated Hospital of Sun Yat-sen University in 2022(No.2022GZRPYMS09).
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Jiawen Li: Conceptualization, formal analysis, investigation, writing–original draft. Qin Wei: Methodology, investigation, visualization. Shaomin Li: Biochemical index examination. Jun Song: Data curation. Cheng Wang: Data curation. Jun Zhang: Project administration, writing—review and editing. Hui Peng: Project administration.
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Li, J., Wei, Q., Li, S. et al. Prognostic value of nighttime blood pressure in patients with chronic kidney disease. Hypertens Res 48, 1351–1362 (2025). https://doi.org/10.1038/s41440-024-02080-0
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DOI: https://doi.org/10.1038/s41440-024-02080-0