“…Of the 27 frailty assessments, 19 were developed in population-based samples [30-32,34-37,40-44,46-48,50,51,53,55], 7 among hospitalized patients [33,39,45,49,52,54,56], and 1 without specification [38]. Half of the frailty scales (n=14) were created by research groups in the USA [30, 31,36,39,41-44,46-49,53,56], five in Canada [32,34,37,52,54], three in the Netherlands [33,40,51], two in Italy [38,45], and one each in Australia [55], France [50], and Sweden [35].…”