Frailty in randomised controlled trials for dementia or mild cognitive impairment measured via the frailty index: prevalence and prediction of serious adverse events and attrition

Table 2 Descriptive statistics of frailty indices

Trial	Frailty index	Mean frailty index [SD]	99th percentile of frailty	Robust (FI < 0.12)	Mild (FI 0.12–0.24)	Moderate (FI 0.24–0.36)	Severe (FI > 0.36)
AD dementia trial	Physical	0.24 (0.08)	0.44	5.5%	45.9%	41.1%	7.5%
AD dementia trial	Physical & cognitive	0.29 (0.07)	0.47	0.5%	24.1%	57.5%	17.9%
MCI trial 1	Physical	0.14 (0.06)	0.31	43.2%	50.0%	6.7%	0.2%
MCI trial 1	Physical & cognitive	0.14 (0.06)	0.30	41.6%	52.3%	5.9%	0.2%
MCI trial 2	Physical	0.14 (0.06)	0.30	38.7%	53.8%	7.5%	0.1%
MCI trial 2	Physical & cognitive	0.15 (0.06)	0.30	35.0%	58.3%	6.6%	0.1%

ISSN: 1758-9193