Table 2 Baseline data of the two older adult groups with CKD stages 3–5

Male sex, n (%)

17

(70.8%)

15

(65.2%)

0.92

eGFR (mL/min/1.73 m²)

36

(19–45)

34

(22–50)

0.72

CKD classification, n (%)

0.27

 Stage 3

17

(70.8%)

13

(56.5%)

 Stage 4

2

(8.3%)

6

(26.1%)

 Stage 5

5

(20.8%)

4

(17.4%)

Cause of renal failure, n (%)

0.50

 Hypertension

12

(50.0%)

10

(43.5%)

 Diabetes mellitus

7

(29.2%)

11

(47.8%)

 Polycystic kidney disease

2

(8.3%)

1

(4.3%)

 Other

3

(12.5%)

1

(4.3%)

MNA-SF scores

12

(11–14)

13

(11–14)

0.26

Physical activity

 IPAQ-SF scores (MET-min/week)

953

(223–2993)

2319

(693–4986)

0.10

Body composition

 Body weight (kg)

61.0

(48.2–68.1)

67.3

(54.8–73.2)

0.06

 BMI (kg/m²⁾

23.5

(20.8–25.2)

24.2

(23.0–27.4)

0.11

 Body fat (%)

20.4

(17.8–23.3)

23.4

(18.8–28.7)

0.10

 Fat mass (kg)

12.3

(9.9–15.0)

15.7

(10.3–20.5)

0.08

 Muscle mass (kg)

44.5

(35.5–52.0)

45.8

(39.4–50.9)

0.59

 Fat-free mass (kg)

47.0

(37.5–54.9)

48.9

(41.9–53.7)

0.58

 Extracellular water (kg)

14.7

(12.7–16.3)

15.4

(13.9–16.0)

0.52

 Intracellular water (kg)

17.9

(14.0–23.3)

19.4

(16.8–22.1)

0.46

 Skeletal muscle index (kg)

7.5

(6.3–8.5)

7.8

(6.5–8.7)

0.55

 Resistance at 50 kHz (Ω)

564

(504–622)

549

(502–594)

0.55

 Phase angle (°)

5.5

(4.7–6.0)

5.6

(5.0–5.9)

0.65

Physical performance

 Hand grip strength (kg)

24.1

(17.0–30.6)

26.9

(19.6–31.4)

0.44

 Gait speed (m/s)

0.85

(0.55–0.95)

0.91

(0.74–1.25)

0.08