Thus far, no study has systematically synthesized longitudinal studies investigating the determinants of frequent attendance in primary care. Consequently, the purpose of our systematic review is to give an overview of evidence based on longitudinal observational studies analyzing the determinants of frequent attendance. Three electronic databases (Medline, PsycINFO, CINAHL) will be searched. Moreover, the reference lists of studies included in our systematic review will be searched manually. Longitudinal observational studies examining the determinants of frequent attendance in primary care will be included. Disease-specific samples will be excluded. Data extraction focuses on methods (e.g., measurement of frequent attendance, statistical analysis), characteristics of the sample and key results. Furthermore, the quality of the studies included will be examined using an appropriate tool. Two reviewers will perform study selection, data extraction, and quality assessment. A meta-analysis will be conducted (if possible).

中文翻译：

---

经常参加基层医疗的决定因素。系统研究纵向研究的研究方案。

迄今为止，还没有系统的综合纵向研究来研究经常参加初级保健的决定因素。因此，我们的系统综述的目的是基于纵向观察研究，分析频繁出勤的决定因素，以提供证据概述。将搜索三个电子数据库（Medline，PsycINFO，CINAHL）。此外，将手动搜索我们系统综述中包括的研究参考文献清单。将包括纵向观察性研究，以检查经常参加初级保健的决定因素。特定疾病的样本将被排除。数据提取侧重于方法（例如，频繁出勤的测量，统计分析），样本特征和关键结果。此外，将使用适当的工具检查纳入研究的质量。两名审稿人将进行研究选择，数据提取和质量评估。进行荟萃分析（如果可能）。