Scoping study of definitions and instruments measuring vulnerability in older adults.

Background: It is important to foster social participation and health equity, especially for older adults in situations of vulnerability. Despite growing interest in vulnerability, there is no consensus regarding how to define or measure this concept. This paper provides an inventory and synthesis of definitions of and instruments measuring vulnerability in older adults.

Methods: Using a scoping study framework, eight databases (Abstracts in Social Gerontology, Academic Search Complete, AgeLine, CINAHL, MEDLINE, SocINDEX, PsycInfo, Scopus) were searched with relevant keywords [Vulnerab* AND (Concept*, Defin*, Meaning, Terminology, Measurement, Assessment*, Indicator*, Instrument*, Scale*, Questionnaire* OR Test*) AND (Aging, Aging, Elder*, Gerontolog*, Older OR Senior*)].

Results: Thirty-one original definitions and five measuring instruments were identified, content-analyzed, and compared. Vulnerability definitions mostly focused on people under conditions that increased their risk of harm because of individual physical factors, the environment, and their interaction. Considering these definitions, experts in the field of aging, including two representing older adults, participated in a workshop, and a consensus was reached to define a situation of vulnerability as "a set of circumstances in which one or more individuals experience, at a specific moment in time, one or multiple physiological, psychological, socioeconomic or social difficulties that may interact to increase their risk of being harmed or having coping challenges that have a negative impact on their life." Although none of the measures fully targeted this definition, the Perceived Vulnerability Scale (PVS) is one of the most complete measures, with 22 items considering feelings of vulnerability toward personal and environmental factors, and good psychometric properties.

Conclusions: The proposed definition and the PVS help to provide a common language and measure in health and social sciences research, policy and practice identifying and reaching older adults in situations of vulnerability and intervening to foster social participation and health equity.