Patient characteristics

Total (n = 200)

Low BMI group (n = 103)

Non-low BMI group (n = 97)

p-value

Age (years)

87 (83-91)

87 (83-91)

86 (83-90)

0.412

Gender (person)

Male: 64 (32%)
Female: 136 (68%)

Male: 38 (37%)
Female: 65 (63%)

Male: 26 (27%)
Female: 71 (73%)

0.127

Weight at admission (kg)

44.5 (38.3-51.4)

39.9 (34.6-44.2)

51.0 (45.2-55.7)

 < 0.001

Body weight at discharge (kg)

44.0 (38.1-51.7)

39.3 (35.5-43.4)

51.7 (45.8-55.6)

< 0.001

BMI at admission (kg/m²)

19.6 (17.3-22.1)

17.4 (15.8-18.7)

22.1 (20.6-23.7)

< 0.001

BMI at discharge (kg/m²)

19.8 (17.2-21.9)

17.3 (15.8-18.4)

21.9 (20.8-23.5)

< 0.001

Weight loss rate (%)

0.1 (-2.9-3.8)

1.1 (-3.2-5.6)

0.0 (-2.5-2.8)

0.217

Albumin level on admission (mg/dl)

3.4 (3.0-3.7)

3.2 (2.9-3.6)

3.4 (3.1-3.8)

0.011

Albumin level at discharge (mg/dl)

3.3 (2.9-3.6)

3.2 (2.9-3.5)

3.3 (3.1-3.7)

0.003

CRP on admission (mg/dl)

1.09 (0.21-4.4)

1.34 (0.34-5.09)

0.78 (0.18-4.27)

0.146

CRP at discharge (mg/dl)

0.40 (0.12-1.5)

0.67 (0.18-1.87)

0.30 (0.10-1.02)

0.017

CCI

2 (1-4)

2 (2-4)

2 (1-4)

0.181

Required energy (kcal)

1437 (1286-1595)

1383 (1254-1537)

1485 (1311-1657)

0.002

Intake energy (kcal)

1254 (960-1590)

1200 (800-1500)

1280 (1025-1600)

0.046

Energy satisfaction rate (%)

85.1 (67.5-101.8)

84.0 (64.0-110.3)

85.5 (77.8-98.7)

0.354

FILS

8 (7-10)

8 (6-10)

9 (8-10)

0.022

Number of hospitalization days

56 (42-59)

56 (42-59)

55 (42-59)

0.983

Hospitalization origin (person)

Outpatient: 83 (41.5%)
Acute Hospital: 60 (30%)
Clinic: 27 (13.5%)
Non-Acute Hospital: 19 (9.5%)
Others: 11 (5.5%)

Outpatient: 47 (46%)
Acute Hospital: 23 (22%)
Clinic: 19 (18%)
Non-Acute Hospital: 7 (7%)
Other: 7 (7%)

Outpatient: 36 (37%)
Acute Hospital: 37 (38%)
Clinic: 8 (8%)
Non-Acute Hospital: 12 (13%)
Other: 4 (4%)

0.025

Discharge destination (person)

Residential nursing home for the elderly: 75 (37.5%)
Home: 66 (33%)
Transfer to the disabled ward: 17 (8.5%)
Home facility: 12 (6%)
Transfer to the medical ward: 8 (4%)
Other: 22 (11%)

Residential nursing home for the elderly: 40 (39%)
Home: 28 (27%)
Transfer to the disabled ward: 12 (11%)
Home facility: 6 (6%)
Transfer to the medical ward: 7 (7%)
Other: 10 (10%)

Residential nursing home for the elderly: 35 (36%)
Home: 38 (39%)
Relocated to the disabled ward: 5 (5%)
6 home-based facilities (6%)
Relocated to the medical ward: 1 (1%)
Other: 12 (13%)

0.099

Disease (person)

Disuse syndrome: 75 (37.5%)
Respiratory disease: 53 (26.5%)
Motor organ disease: 50 (25%)
Heart disease: 22 (11%)

Disuse syndrome: 32 (31%)
Respiratory disease: 31 (30%)
Motor organ disease: 28 (27%)
Heart disease: 12 (12%)

Disuse syndrome: 43 (44%)
Respiratory disease: 22 (23%)
Motor organ disease: 22 (23%)
Heart disease: 10 (10%)

0.276

Exercise FIM (points) on admission

37 (16-66)

32 (15-61)

43 (20-67.5)

0.059

Cognitive FIM at admission (point)

21 (12-31)

19 (11-29)

24 (14-33)

0.025

Total FIM at admission (points)

58 (30-94)

48 (26-92)

70 (35-98.5)

0.038

Exercise FIM (points) at discharge

55 (20-78)

41 (18-75)

64 (27-82)

0.005

Cognitive FIM at discharge (point)

23 (12-32)

20 (11-29)

27 (14-33)

0.015

Total FIM at discharge (points)

76 (32-110)

63 (29-105)

90 (42-113)

0.005

Motor FIM gain (point)

5 (1-13)

4 (0-11)

7 (1-15)

0.011

Cognitive FIM gain (points)

0 (0-1)

0 (0-1)

0 (0-1)

0.499

Total FIM gain (points)

6 (1-13)

4 (0-11)

8 (2-16)

0.016