Accommodation-based interventions for individuals experiencing, or at risk of experiencing, homelessness.

Background:Globally, almost 1.6 billion individuals lack adequate housing. Manyaccommodation‐based approaches have evolved across the globe to incorporateadditional support and services beyond delivery of housing.Objectives:This review examines the effectiveness of accommodation‐based ap-proaches on outcomes including housing stability, health, employment, crime, well-being, and cost for individuals experiencing or at risk of experiencing homelessness.Search Methods:The systematic review is based on evidence already identified in twoexisting EGMs commissioned by the Centre for Homelessness Impact (CHI) and built byWhite et al. The maps were constructed using a comprehensive three stage search andmapping process. Stage one mapped included studies in an existing systematic reviewon homelessness, stage two was an extensive search of 17 academic databases, threeEGM databases, and eight systematic review databases. Finally stage three includedweb searches for grey literature, scanning reference lists of included studies and con-sultation with experts to identify additional literature. We identified 223 unique studiesacross 551 articles from the effectiveness map on 12th April 2019.Selection Criteria:We include research on all individuals currently experiencing, orat risk of experiencing homelessness irrespective of age or gender, in high‐incomecountries. The Network Meta‐Analysis (NMA) contains all study designs where acomparison group was used. This includes randomised controlled trials (RCTs),quasi‐experimental designs, matched comparisons and other study designs that at-tempt to isolate the impact of the intervention on homelessness. The NMA primarilyaddresses how interventions can reduce homelessness and increase housing stabilityfor those individuals experiencing, or at risk of experiencing, homelessness. Addi-tional outcomes are examined and narratively described. These include: access tomainstream healthcare; crime and justice; employment and income; capabilities andwellbeing; and cost of intervention. These outcomes reflect the domains used in theEGM, with the addition of cost