Table 1

Summary table of included studies from systematic peer review search

Number	Authors	Year	Title	Countries	Topic/intervention	Aims of the review
1	Aidala et al26	2016	Housing status, medical care, and health outcomes among people living with HIV/AIDS: a systematic review	USA, France, Spain, Italy, Finland and South Korea	HIV treatment	To review the literature on the role of housing status for medical care and health outcomes among people with HIV infection.
2	Brown et al61	2016	Systematic review of barriers and facilitators to accessing and engaging with mental health care among at-risk young people	Australia, UK, USA, Canada	Mental health services	To review the literature on the barriers and facilitators to accessing and engaging with mental healthcare among young people from potentially disadvantaged groups.
3	Crock57	2016	Access to healthcare services for people living with HIV experiencing homelessness - a literature review	USA, Canada, Australia	Community nursing	To review the literature on strategies that enhance the ability of people living with HIV who are homeless to access healthcare services, in particular community nursing services.
4	Dawson and Jackson44	2013	The primary health care service experiences and needs of homeless youth: a narrative synthesis of current evidence	USA, Australia	Primary healthcare	To review the literature on access to primary healthcare services for homeless youth.
5	Elliott59	2013	Meeting the health care needs of street-involved youth	Canada, USA	Full spectrum healthcare	To reviews reasons why youth turn to the street, risks of the ‘street economy’ and barriers to healthcare.
6	Hamilton et al60	2018	A systematic review of active case-finding strategies for tuberculosis in homeless populations	USA, UK, France, Germany, Switzerland, Australia, Poland, Spain	Tuberculosis (TB)	To review the literature to determine the effectiveness of active case finding for TB control, and identify strategies to improve uptake of screening and the diagnostic pathway in homeless populations in low-burden and medium-burden settings.
7	Harris and Rhodes25	2013	Hepatitis C treatment access and uptake for people who inject drugs: a review mapping the role of social factors	Not specified	Hepatitis C treatment	To review the literature on barriers to hepatitis C treatment access, uptake and completion for people who inject drugs.
8	Hudson et al39	2016	Challenges to access and provision of palliative care for people who are homeless: a systematic review of qualitative research	USA, Canada, Sweden, UK, Australia	Palliative care	To review published qualitative research exploring challenges to palliative care access and provision.
9	Islam and Conigrave75	2007	Assessing the role of syringe dispensing machines and mobile van outlets in reaching hard-to-reach and high-risk groups of injecting drug users (IDUs): a review	Norway, the Netherlands, Italy, Australia, Germany, Switzerland, France, Spain, USA, Canada, Russia, Bulgaria, Lithuania	Needle exchange	To review the effectiveness of syringe dispensing machines and mobile van or bus-based needle syringe programmes in making services accessible to hard-to-reach and high-risk groups of IDUs.
10	John and Law72	2011	Addressing the health needs of the homeless	UK and other not specified	Nursing	To review the literature on the health needs of homeless people and what role can nurses play in addressing homeless people’s health needs.
11	Jones et al71	2009	Cardiovascular disease risk among the poor and homeless – what we know so far	Not specified	Cardiovascular care	To review the literature detailing the relationships between poverty, homelessness and cardiovascular disease.
12	Kaduszkiewicz et al73	2017	The medical treatment of homeless people	Not specified	Primary and inpatient hospital care	To review the medical treatment of homeless people in Germany.
13	Klop et al⁵²	2018	Palliative care for homeless people: a systematic review of the concerns, care needs and preferences, and the barriers and facilitators for providing palliative care	USA, Canada, Sweden, UK, Australia, Ireland	Palliative care	To review the evidence of the concerns and palliative healthcare needs for homeless people, as well as the conditions for delivering good quality palliative care for the target group.
14	Lamb et al54	2012	Access to mental health in primary care: a qualitative meta-synthesis of evidence from the experience of people from “hard to reach” groups	UK, Finland, Switzerland	Mental health treatment in primary care	To review and understand barriers to mental health treatment for eight socially excluded groups including the homeless.
15	Luchenski et al62	2018	What works in inclusion health: overview of effective interventions for marginalised and excluded populations	Not specified	Healthcare, social care, housing	To review effective interventions that directly affect health (eg, pharmacology, counselling, screening, prevention) or the wider determinants of health (eg, housing, social support, training and education, employment, crime and recidivism).
16	Lutge et al79	2015	Incentives and enablers to improve adherence in tuberculosis	USA, Timor-Leste, South Africa	Tuberculosis	To review the effects of material incentives and enablers given to patients undergoing diagnostic testing for TB, or receiving drug therapy to prevent or cure TB.
17	Martens76	2009	Vulnerable categories of homeless patients in Western societies: experience serious barriers to health care access	Not specified	Primary care, mental healthcare, addiction treatment	To review healthcare access for especially vulnerable categories of homeless persons.
18	Robards et al53	2018	How marginalized young people access, engage with, and navigate health-care systems in the digital age: systematic review	UK, USA, Australia, Canada, New Zealand, Portugal	Full spectrum healthcare	To review what is known about marginalised young people’s access to, engagement with, and navigation of the health system in the digital age.
19	Sumalinog et al55	2017	Advance care planning, palliative care, and end-of-life care interventions for homeless people: a systematic review	USA, Canada, Sweden	Shelter-based palliative care programme, completion of advance directive, professional support home services	To review the evidence surrounding advance care planning, palliative care and end-of-life care interventions for homeless persons.
20	Tankimovich78	2013	Barriers to and interventions for improved tuberculosis detection and treatment among homeless and immigrant populations: a literature review	USA, UK, Spain, Israel, the Netherlands, Ethiopia	Tuberculosis detection and treatment	To review barriers to the detection and treatment of TB in immigrant and homeless populations in the USA and to review effective interventions for improved detection and treatment.
21	Wallace et al63	2018	Community boundary spanners as an addition to the health workforce to reach marginalised people: a scoping review of the literature	USA, UK, the Netherlands, Australia, New Zealand	Lay person patient navigators/peer workers/link workers	To review the literature on the role played, in health service delivery and health literacy development in high-income countries, by community-based lay persons.
22	Weber et al56	2017	Understanding the health of veterans who are homeless: a review of the literature	USA	Public health nursing	To review the literature of what is known about the health of homeless veterans.
23	White et al65	2016	Access to diabetes care for populations experiencing homelessness: an integrated review	USA, Canada	Diabetes care	To review the literature to identify barriers and facilitators to accessing diabetes care and managing diabetes for homeless populations.
24	White and Newman40	2015	Access to primary care services among the homeless: a synthesis of the literature using the equity of access to medical care framework	USA	Primary care	To review the literature to identify barriers and facilitators to primary care access among the homeless.