*3.4. Definition of Selection Criteria*

This stage of the review process involves defining search and selection criteria enabling the categorization of diverse studies into relevant and non-relevant literature. The selection involved a three-stage screening process and a final inclusion criterion. The literature search in PubMed, Web of Science, and specific searches in Google and Google Scholar yielded 15,371 records. Using Citavi, duplicates were removed during importation of citation text data, which brought the number of records to 10,178. First, the records were screened by titles to eliminate literature that, by their titles, were either irrelevant or unrelated to land tenure security and health. For instance, titles such as "Where Did They Come from-Multi-Drug Resistant Pathogenic Escherichia coli in a Cemetery Environment?" and "Similarities and Differences Between Yoruba Traditional Healers (YTH) and Native American and Canadian Healers (NACH)" were removed. This step excluded 9733 records. The remaining records were screened by reading their abstracts and selecting those which referred at least to a context in which either land tenure and/or health were discussed. This yielded 95 documents, which were selected for full review (see Figure 1 for flowchart of literature search process). A study was considered relevant literature for inclusion in this review, only if their abstracts suggested a focus on land tenure (in)security and variants of the term (including housing tenure, homeownership, tenure regularization, homelessness, housing security, land security, housing instability, etc.) and health variables including, sanitation, pollution, diseases, and illnesses. By full review, we mean reading and extracting data from the abstracts, introduction, findings, and conclusion of each study.

**Figure 1.** Flowchart of literature search process.
