There are around 20 studies identifying the prevalence of chronic loneliness and chronic social isolation in older adults. However, there is an absence of a systematic review, meta-analysis and meta-regression that consolidates the available observational studies. Therefore, our objective was to address this knowledge gap. Here, we present the study protocol for this upcoming work. Such knowledge can help in addressing older individuals at risk for chronic loneliness and chronic social isolation.

Established electronic databases will be searched. Observational studies reporting the prevalence of chronic loneliness and chronic social isolation among individuals aged 60 years and over will be included. Disease-specific samples will be excluded. The focus of data extraction will be on methods, sample characteristics and key findings. The Joanna Briggs Institute (JBI) standardised critical appraisal instrument for prevalence studies will be used for assessing the quality of the studies. Two reviewers will be responsible for carrying out the study selection, data extraction and assessment of study quality. The results will be presented through the use of figures, tables, narrative summaries and a meta-analysis and meta-regression.

No primary data will be collected. Thus, there is no need for approval from an ethics committee. We intend to share our results through publication in a peer-reviewed journal.