Improving Insight and Application: A Commentary on the Link between Initial Depression and Anxiety and Long‐Term Health Outcomes in Parkinson's Disease Patients

We recently had the opportunity to review the article titled "Association of Baseline Depression and Anxiety with Longitudinal Health Outcomes in Parkinson's Disease" by Dr. Shi et al,1 published in your esteemed journal. This study offers valuable insights into the impact of neuropsychiatric symptoms on the progression of Parkinson's disease (PD). We commend the authors for elucidating this crucial aspect of PD management and offer several suggestions that may help broaden the impact of their findings. First, we appreciate the comprehensive analysis and the use of a well-defined cohort for long-term follow-up. Authors discuss challenges related to long-term follow-up and data completeness, the section on statistical analysis lacks specific details about the techniques employed to address these issues. Given the potential impact of missing data on longitudinal studies, we recommend that future research incorporate methods such as multiple imputation or last observation carried forward2 to manage potential data gaps, thereby ensuring the robustness of the study results. Second, while the article conducts subgroup analyses of anxiety and depression in PD patients, these broad categorizations may obscure more nuanced differences between subtypes. The lack of detailed information on the types and severity of anxiety and depression is acknowledged; however, the study should also explore how various treatment modalities interact with factors such as age, gender, socioeconomic status,3 and social support in influencing the long-term health outcomes of depression and anxiety. Incorporating these variables into subgroup analyses would enable a more precise assessment of the specific needs and optimal interventions for different patient subgroups, thus facilitating more personalized and effective treatment plans for PD patients. Third, the study may not adequately account for the impact of comorbid chronic conditions on depression and anxiety in PD patients, such as cognitive impairment4 and other neurological disorders. These factors could significantly influence the psychological and functional outcomes of the disease. Additionally, the study lacks detailed information on the specific types and consistency of treatment interventions. We recommend providing more detailed descriptions of the variety and consistency of antidepressant medications and psychological therapies used in the study to enhance the interpretability and applicability of the findings. Finally, given the limitations identified in this study concerning the association between depression, anxiety, and long-term health outcomes in PD patients, we recommend adopting more comprehensive assessment and monitoring strategies in emergency management. Establishing regular psychological health assessments and tracking mechanisms, coupled with randomized controlled trials, would allow for more effective monitoring and evaluation of the long-term efficacy of treatment plans. This approach would facilitate early identification and timely intervention for depression and anxiety in PD patients, ultimately enhancing disease management and improving quality of life. In conclusion, addressing these issues will enrich both the understanding and application of the study's findings. We appreciate your consideration of our comments and eagerly anticipate future updates from your Journal, continuing its tradition of excellence in research dissemination. (1) Research project: A. Conception, B. Organization, C. Execution; (2) Statistical Analysis: A. Design, B. Execution, C. Review and Critique; (3) Manuscript: A. Writing of the first draft, B. Review and Critique. X.G.: 1A, 1B, 2A, 3A. K.L.: 1A, 1B, 2A, 3A. S.L.: 1C, 2A, 2B, 2C, 3B. None. Ethical Compliance Statement: The author confirms that the approval of an institutional review board was not required for this work. The author confirms that informed patient consent was not required for this work. We confirm that we have read the Journal's position on issues involved in ethical publication and affirm that this work is consistent with those guidelines. Funding Sources and Conflicts of Interest: The author declares that there are no conflicts of interest relevant to this work. This work was supported by People's Livelihood Science and Technology Special-Social Development Topic (No.2021-004-SF0-0079). Financial Disclosures of All Authors (for the past 12 Months): The author declares that there are no additional disclosures to report. Data sharing not applicable to this article as no datasets were generated or analysed during the current study.