Table 2.

Design and intended uses of a sample of frailty instruments in human gerontology.

Number of interpretive categories within the instrument
	Frail vs. non-frail (34, 35)
	≥3 Levels of frailty (15, 23)
Scale type
	Dichotomous scale (36–38)
	Ordinal scale (1, 15, 39)
	Continuous scale (28, 29)
Domains included, with most commonly used domains listed first:
	Physical (15, 23, 37, 39)
	Psychological (28, 29)
	Social (1, 28, 30)
	Environmental (31, 32)
Settings in which instrument is used
	Community (1, 15, 28, 39)
	Primary care/geriatric practice (29)
	Emergency departments (40)
	General hospitals (41)
	Long-term care facilities/nursing homes (30, 36, 41)