Table 1.

Eligibility criteria used for selecting studies in the review.

	Inclusion criteria	Exclusion criteria
Population	People aged 16 and over experiencing homelessness during COVID-19 pandemic. Using the ETHOS definition of homelessness (23) Country of origin: upper and middle income countries.	Studies that do not include research on people experiencing homelessness. Populations in low-income countries People under the age of 16.
Intervention	Single or multi-component intervention(s) that had the aim of reducing a risk or complication of COVID-19 in the people experiencing homelessness (e.g., testing in a homeless shelter and temporary housing initiatives). Interventions targeted at an individual, centre or population level.	Studies that do not describe an intervention with an aim relating to the COVID-19 pandemic. E.g., an intervention to reduce smoking rates. Interventions to prevent homelessness, e.g., a policy to prevent evictions by landlords.
Comparisons	Comparison of outcomes to a historical control from before to during the pandemic or to another similar population without intervention	Opinion pieces; Studies with no comparison. Systematic reviews (reference lists checked)
Outcome measures	Studies reporting clinical outcomes related to COVID-19: Rates of COVID-19 transmission Hospitalisation and mortality rates relating to COVID-19 infection Healthcare safety incidents Mental health impact Long COVID rates	Clinical outcomes of COVID-19 not measured (or described)
Language	English	Not published in English
Publication date, type	During / since start of pandemic, published and preprint