Table 2.

Descriptive statistics for age and raw Frailty Index at each wave in ELSA.

	N	Mean	SD	Range
Group 1
Frailty index	3983	0.14	0.10	0–0.68
Age	3983	68.44	1.10	67.00–70.00
Group 2
Frailty index	3491	0.15	0.10	0.007–0.66
Age	3491	72.4	1.09	71.00–74.00
Group 3
Frailty index	2727	0.18	0.11	0.01–0.79
Age	2727	76.37	1.09	75.00–78.00
Group 4
Frailty index	2020	0.20	0.12	0.01–0.79
Age	2020	79.95	0.76	79.00–81.00
Group 5
Frailty index	1495	0.22	0.12	0.01–0.74
Age	1495	82.88	0.76	82.00–84.00