Study title

Spain

Individual

The identification of potential participants was carried out by snowball sampling. Known individuals were identified with 4 methods: • Canary Islands Health Service: An information record sheet (Annex 1) was distributed among the health workers of the ZBS of Maspalomas and Vecindario to introduce the study and collect information about participants, settlements or resources. Likewise, collaboration was requested from the Mental Health Units of Barrio Atlántico and Vecindario, as well as the Assertive Community Treatment Team (ETAC). • Public agencies: Telephone contact with Social Services of the municipalities that host the basic health areas that are studied. In addition, Social Inclusion programs and Civil Protection were contacted. • Privately based entities: Personal contact with Cáritas Diocesana de Canarias and Spanish Red Cross. • Informal methods: Fieldwork visiting the settlements, press search and contact with neighborhood associations.Through this process, a database was generated to coordinate the visits which would be arranged with each of the participants through contact by phone, to first inform of the research and to choose a date for the visit either in the Reference Health Center or in their home. At the time of the personal contact, we carried a presentation of the researchers, reference institution, project and then we offered the informed consent and authorization for data management (Annex 3). Data collection was carried out in Gran Canaria between January and March 2022. For the measurement of self-perceived quality of life, this study used the SF-12 health questionnaire in its version 2 (Annex 1). Due to its brevity, ease of use[17] and use in other reference studies[3]. The housing characteristics analysis tool (Annex 2) was elaborated adding interesting elements for the study to a social assessment questionnaire[18,19]. This Household Questionnaire consists of 21 items that encompass 6 dimensions of housing: Property, Inhabitants, Housing Characteristics, Supplies, Intrinsic Problems and Neighborhood. Both questionnaires share a section that reflects the date of birth, nationality and gender.