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Table 2 Prevalence of frailty components in wave 2 and wave 4 of ELSA

From: Developing a composite outcome measure for frailty prevention trials – rationale, derivation and sample size comparison with other candidate measures

  Wave 2 (n = 5344)Wave 4 (n = 3088)
Mean age (years) (SD)All71.3 (8.2)69.9 (7.2)
With any missing data74.2 (9.7)73.9 (8.3)
Male sex (%)All2389 (44.7)1368 (44.3)
With any missing data299/694 (43.0)138/374 (36.9)
Weight loss / low BMI (%)Calculable391/5107 (7.7)282/3088 (9.1)
Missing237/5344 (4.4)0/3088 (0)
Low grip strength (%)Calculable1049/5251 (20.0)689/2888 (23.9)
Missing93/5344 (1.7)200/3088 (6.5)
Low gait speed (%)Calculable977/4886 (20.0)694/2880 (24.1)
Missing458/5344 (8.6)208/3088 (6.7)
Exhaustion (%)Calculable1638/5314 (30.8)816/3077 (26.5)
Missing30/5344 (0.6)11/3088 (0.4)
Low activity levels (%)Calculable1196/5341 (22.4)709/3088 (23.0)
Missing3/5344 (0.06)0/3088 (0)
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