Martínez–Velilla N, et al. – This study is performed with the primary objective to determine the prevalence and feasibility of different frailty screening tools in nursing homes as well as its relationship with multimorbidity and disability. Researchers identified that frailty among residents of nursing homes is common, but there is no single operational definition of frailty. Although all measures of frailty seem to have similar associations with the clinical variables of the study, there are important conceptual differences that must be considered in addressing the relationships between frailty, disability, and multimorbidity. Further research is required, and homogeneous frailty criteria must be used so that studies and interventions can be compared.