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The delta/alpha ratio in sleep EEG increases with the severity of depression in patients over 50 years old

Crossref DOI link: https://doi.org/10.1186/s12888-025-07367-1

Published Online: 2025-10-27

Update policy: https://doi.org/10.1007/springer_crossmark_policy

Authors

Yang, Letian

Kong, Xiaoming

Geng, Hao

Xie, Pengyu

Sun, Yan

Lv, Siwen

Guo, Yu

Gao, Xinyu

Zhu, Nannan

Li, Jiaojiao

Pei, Yangliu
Funding

Funding for this research was provided by:

National Clinical Key Specialty Construction Project of China

Anhui Province Clinical Key Specialty Construction Project

Anhui Provincial Health Research Program (AHWJ2023A20208, AHWJ2023A20208, AHWJ2023A20208, AHWJ2023A20208, AHWJ2023A20208, AHWJ2023A20208, AHWJ2023A20208, AHWJ2023A20208, AHWJ2023A20208, AHWJ2023A20208, AHWJ2023A20208)

Hefei Seventh-cycle Key Medical Specialty

Applied Medical Research Program of Hefei Municipal Health and Wellness Commission (Hwk2022zd016, Hwk2022zd016, Hwk2022zd016, Hwk2022zd016, Hwk2022zd016, Hwk2022zd016, Hwk2022zd016, Hwk2022zd016, Hwk2022zd016, Hwk2022zd016, Hwk2022zd016)
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Text and Data Mining valid from 2025-10-27

Version of Record valid from 2025-10-27
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Article History

Received: 30 December 2024

Accepted: 22 August 2025

First Online: 27 October 2025

Declarations

:

: All experiments were conducted in accordance with the Declaration of Helsinki and institutional guidelines, and were approved by the Clinical Research Ethics Review Committee of the Fourth People’s Hospital of Hefei (approval date: October 27, 2023; ethical approval reference number: HFSY-IRB-YJ-KYXMKXM(2023–070 − 001)). Written informed consent was obtained from all individual participants included in the study. The authors affirm that patient confidentiality has been fully maintained.

: Not applicable.

: The authors declare no competing interests.

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