https://www.selleckchem.com/products/wm-8014.html The search will be conducted independently by two reviewers from database inception to September 2020. A reference list will be made identifying all eligible studies. Titles and abstracts will be reviewed, as well as the full text of articles that meet the inclusion criteria. To assess methodological quality, a standardized critical appraisal checklist for studies reporting prevalence will be selected, followed by standardized data extraction using the JBI tool. The results from included studies will be analyzed using JBI SUMARI. PROSPERO CRD42020204311. PROSPERO CRD42020204311. The purpose of this review is to summarize the techniques used for network analysis of multimorbidity to inform development of a standard methodology. There is a growing trend of using network analysis to investigate relationships between chronic illnesses in people with multimorbidities. However, there is currently no recommended approach to calculating and displaying networks of chronic health conditions. This review intends to summarize the current literature to further the development of a standard methodology. Studies will be included if they investigated the relationships between multiple chronic health conditions without referring to an index condition, using network analysis techniques. Studies using both survey and administrative data will be included. Studies including biological or genomic data sets will not be included as they are out of scope. Databases searched will include PubMed (MEDLINE), Science Direct, Scopus, and PsycINFO. All relevant publications will be included provided they were published before October 2020. Publications from all languages will be included where an appropriate translation in English can be obtained. Data extracted will include country of origin, type of data used, measure of association, software used, and notes on any specific points of methodological interest relevant to the review question. Databa