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Table 2 Baseline demographic characteristics and mortality by grades of frailty

From: A frailty index based on routine laboratory data predicts increased risk of mortality in Chinese community-dwelling adults aged over 55 years: a five-year prospective study

Baseline characteristic

Total

N = (1257)

 

Grades of the FI

 < 0.20

0.20–0.29

0.30–0.39

 > 0.40

FI-self-report

 

n = 1066

n = 116

n = 38

n = 37

Mean age, years (± SD)

69.2 ± 8.1

68.1 ± 7.7

73.3 ± 7.4

76.8 ± 5.9

78.7 ± 9.1

Mean FI-self-report (± SD)

0.11 ± 0.10

0.08 ± 0.05

0.24 ± 0.03

0.35 ± 0.03

0.49 ± 0.07

Women, n (%)

707 (56.2)

572 (53.6)

85 (73.3)

23 (62.2)

27 (73.0)

Rural dwelling, n (%)

834 (66.3)

684 (64.1)

88 (75.9)

32 (86.5)

30 (81.1)

9+ years education, n (%)

395 (31.8)

369 (34.9)

20 (17.5)

2 (5.7)

4 (10.8)

Smoking, n (%)

386 (30.8)

344 (32.3)

27 (23.3)

10 (27.0)

5 (13.9)

Drinking, n (%)

384 (30.5)

342 (32.1)

26 (22.4)

11 (29.7)

5 (13.9)

Mortality, n (%)

155 (12.3)

90 (8.4)

24 (29.7)

19 (51.4)

22 (59.5)

FI-lab

 

 < 0.20

0.20–0.29

0.30–0.39

 > 0.40

  

n = 199

n = 362

n = 221

n = 475

Mean age, years (± SD)

69.2 ± 8.1

66.1 ± 7.6

68.6 ± 8.2

69.8 ± 8.2

70.6 ± 7.5

Mean FI-lab (± SD)

0.33 ± 0.14

0.10 ± 0.04

0.24 ± 0.03

0.34 ± 0.01

0.49 ± 0.08

Women, n (%)

707 (56.2)

108 (54.3)

213 (58.8)

127 (57.5)

259 (54.5)

Rural dwelling, n (%)

834 (66.3)

130 (65.3)

241 (66.6)

151 (68.3)

312 (65.7)

9+ years education, n (%)

395 (31.8)

80 (40.8)

117 (32.3)

68 (30.8)

130 (27.3)

Smoking, n (%)

386 (30.8)

58 (29.1)

110 (30.4)

68 (30.8)

150 (31.6)

Drinking, n (%)

384 (30.5)

60 (29.9)

110 (30.5)

66 (29.9)

148 (31.1)

Mortality, n (%)

155 (12.3)

13 (6.5)

35 (9.7)

30 (13.6)

77 (16.3)

FI-combined

 

 < 0.20

0.20–0.29

0.30–0.39

 > 0.40

  

n = 770

n = 338

n = 110

n = 39

Mean age, years (± SD)

69.2 ± 8.1

67.3 ± 7.5

70.8 ± 8.0

74.2 ± 7.2

76.8 ± 8.4

Mean FI-combined (± SD)

0.19 ± 0.09

0.13 ± 0.04

0.24 ± 0.03

0.34 ± 0.03

0.46 ± 0.05

Women, n (%)

707 (56.2)

410 (53.2)

191 (56.5)

77 (70.0)

29 (74.4)

Rural dwelling, n (%)

834 (66.3)

488 (63.4)

229 (67.8)

85 (77.3)

32 (82.1)

9+ years education, n (%)

395 (31.8)

291 (37.8)

82 (24.3)

17 (15.5)

5 (12.8)

Smoking, n (%)

386 (30.8)

244 (31.6)

103 (30.5)

32 (29.1)

7 (17.9)

Drinking, n (%)

384 (30.6)

253 (32.9)

96 (28.4)

26 (23.6)

9 (23.0)

Mortality, n (%)

155 (12.3)

56 (7.3)

44 (13.0)

32 (29.1)

23 (59.0)

  1. Abbreviations: FI Frailty index, SD Standard deviation
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BMC Geriatrics

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