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Table 2 Baseline differences between the socially robust and socially declined groups during the two-year follow-up

From: Physical frailty predicts the development of social frailty: a prospective cohort study

Variables

Socially Robust (n = 277)

Socially declined (n = 65)

P-value

Age, y, mean (SD)

72.0 (5.3)

75.0 (6.3)

< 0.001

Women, n (%)

167 (60)

50 (77)

0.012

Height, cm, mean (SD)

157.2 (8.2)

153.2 (7.7)

< 0.001

Body mass index, kg/m2, mean (SD)

22.7 (3.0)

22.2 (3.0)

0.292

Medication, n, median (IQR)

1 (0–3)

2 (0–3)

0.599

Multimorbidity, n (%)

66 (28)

37 (34)

0.184

MMSE, median (IQR)

29 (27–30)

28 (26–30)

0.081

Education, y, median (IQR)

12 (12–14)

12 (12–14)

0.933

GDS, median (IQR)

0 (0–1)

0 (0–2)

0.035

History of falls, n (%)

39 (17)

37 (34)

0.030

TMIG-IC, median (IQR)

13 (13–13)

13 (13–13)

0.723

Gait speed, m/s (SD)

1.5 (0.2)

1.4 (0.2)

0.006

Handgrip strength, kg (SD)

29.3 (7.8)

25.6 (6.1)

< 0.001

MVPA, METs・hour (SD)

3.4 (2.6)

2.5 (1.9)

0.012

Physically any-frailty

83 (30)

27 (42)

0.072

Subdomain of physical frailty

 Slow gait speed, n (%)

4 (1)

2 (3)

0.320

 Weakness, n (%)

8 (3)

4 (6)

0.198

 Exhaustion, n (%)

42 (15)

13 (20)

0.339

 Low activity, n (%)

16 (6)

8 (12)

0.064

 Weight loss, n (%)

33 (12)

8 (12)

0.930

Socially Robust, n (%)

277 (100)

–

–

Socially pre-frail, n (%)

–

53 (82)

–

Socially frail, n (%)

–

12 (18)

–

Subdomain of social frailty

 Financial difficulty, n (%)

–

11 (3)

–

 Living alone, n (%)

–

11 (3)

–

 Lack of social activity, n (%)

–

50 (15)

–

 Lack of contact with neighbors, n (%)

–

6 (2)

–

  1. SD Standard deviation, IQR Interquartile range, GDS Geriatric depression scale, TMIG-IC Tokyo Metropolitan Institute of Gerontology Index of Competence, MVPA Moderate to vigorous physical activity
  2. χ2 test or Fisher exact test for proportions, Student t-test for parametric variables and Mann–Whitney U test for non-parametric variables