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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)

All

71.3 (8.2)

69.9 (7.2)

With any missing data

74.2 (9.7)

73.9 (8.3)

Male sex (%)

All

2389 (44.7)

1368 (44.3)

With any missing data

299/694 (43.0)

138/374 (36.9)

Weight loss / low BMI (%)

Calculable

391/5107 (7.7)

282/3088 (9.1)

Missing

237/5344 (4.4)

0/3088 (0)

Low grip strength (%)

Calculable

1049/5251 (20.0)

689/2888 (23.9)

Missing

93/5344 (1.7)

200/3088 (6.5)

Low gait speed (%)

Calculable

977/4886 (20.0)

694/2880 (24.1)

Missing

458/5344 (8.6)

208/3088 (6.7)

Exhaustion (%)

Calculable

1638/5314 (30.8)

816/3077 (26.5)

Missing

30/5344 (0.6)

11/3088 (0.4)

Low activity levels (%)

Calculable

1196/5341 (22.4)

709/3088 (23.0)

Missing

3/5344 (0.06)

0/3088 (0)