Precarious employment has become an urgent public health issue at a global scale with potential consequences for quality of life and health of employees, especially in vulnerable groups such as migrants. The primary aim of this systematic review is thus to analyze and summarize existing research on the association between precarious employment and migrant workers’ mental health. We will search PubMed/MEDLINE, PsycINFO, Web of Science (from January 1970 onwards) for original articles on observational studies (e.g., cohort, case-control and cross-sectional, and qualitative) published in English, German, Turkish, and Spanish. The primary outcome will be depression and anxiety disorders. Secondary outcomes will be burnout, sleeping problems, and occupational stress. Two reviewers will independently screen all citations, full-text articles, and abstract data. Potential conflicts will be resolved through discussion. The methodological quality (or risk of bias) of individual studies will be appraised using an appropriate tool. A narrative synthesis will summarize and explain the characteristics and findings of the studies. If feasible, we will conduct random effects meta-analyses where appropriate. This systematic review will analyze the ways in which precarious employment affects migrant workers’ mental health and the process that underlies this relationship. The results from the systematic review outlined in this protocol will be of interest to labor and health professionals, policy makers, labor unions, and non-governmental organizations. Our findings may encourage and impel related policy makers to establish human-focused, safe and healthy work environments, and workplace conditions. PROSPERO, CRD42019132560

中文翻译：

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不稳定就业和农民工心理健康：观察性研究系统评价方案

不稳定的就业已成为全球范围内一个紧迫的公共卫生问题，可能对员工的生活质量和健康产生影响，特别是移民等弱势群体。因此，本系统综述的主要目的是分析和总结关于不稳定就业与农民工心理健康之间关系的现有研究。我们将搜索 PubMed/MEDLINE、PsycINFO、Web of Science（从 1970 年 1 月起）以英语、德语、土耳其语和西班牙语发表的有关观察性研究（例如队列、病例对照、横断面和定性）的原始文章。主要结果是抑郁症和焦虑症。次要结果是倦怠、睡眠问题和职业压力。两名审稿人将独立筛选所有引文、全文文章和摘要数据。潜在的冲突将通过讨论解决。个别研究的方法学质量（或偏倚风险）将使用适当的工具进行评估。叙述性综合将总结和解释研究的特点和结果。如果可行，我们将在适当的情况下进行随机效应荟萃分析。本系统综述将分析不稳定就业对农民工心理健康的影响方式以及这种关系背后的过程。本议定书概述的系统审查结果将引起劳工和卫生专业人员、政策制定者、工会和非政府组织的兴趣。我们的研究结果可能会鼓励和推动相关政策制定者建立以人为本、安全健康的工作环境和工作条件。普洛斯彼罗，CRD42019132560