. 2020 May 5;20:160. doi: 10.1186/s12877-020-01550-7

Table 3.

Predictive capacity of the FI-PAC for hospital outcomes in different Frailty Index (FI) cut-off points

Outcome	FI cut-off point	Sensitivity		Specificity		PPV^a		NPV^b
Outcome	FI cut-off point	n	(%)	n	(%)	n	(%)	n	(%)
Prolonged hospital stay (≥90 days)	≥0.40	227/409	(56)	975/1282	(76)	227/534	[43]	975/1157	(84)
Prolonged hospital stay (≥90 days)	≥0.32	332/409	(81)	778/1282	(61)	332/836	[40]	778/855	(91)
Emergency department admission	≥0.40	79/204	[41]	1157/1691	(68)	79/613	[13]	1157/1282	(90)
Emergency department admission	≥0.30	148/204	(73)	745/1691	[44]	148/1094	[14]	745/801	(93)
In-hospital mortality	≥0.40	156/231	(68)	1316/1957	(67)	156/797	[20]	1316/1391	(95)
In-hospital mortality	≥0.35	188/231	(81)	1057/1957	(54)	188/1088	[17]	1057/1100	(96)

^a Positive predictive value

^b Negative predictive value