👉 Excluded studies often inhabit environments characterized by limited data availability, such as niche fields, underfunded research areas, or studies with non-representative samples. These studies may occur in academic disciplines with small sample sizes, regions with restricted access to resources, or projects lacking institutional support. They are frequently excluded from meta-analyses or systematic reviews due to concerns about generalizability, methodological limitations, or insufficient statistical power, which can hinder their inclusion in broader evidence synthesis efforts.
