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Table 2 Baseline characteristics

From: Whole-body vibration training versus conventional balance training in patients with severe COPD—a randomized, controlled trial

 

WBV balance training group

conventional balance training group

p-values

General

 n

24

24

 Age, ys

65 ± 7

66 ± 8

0.415

 BMI, kg/m2

25.3 ± 5.1

26.0 ± 5.2

0.398

 LTOT, n [%]

11 (46%)

8 (33%)

0.376

 FEV1, %predicted#

36.2 ± 8.4

38.0 ± 6.3

0.466

 RV, %predicted#

218.6 ± 40.4

233.4 ± 37.1

0.301

 pO2 at rest and ambient air, mmHg

61.5 ± 5.5

63.8 ± 4.1

0.155

 Comorbidities, n

2.5 [0–5]

2.4 [0–6]

0.756

 Falls during the previous year, n (%)

2 (8%)

5 (21%)

0.389

Static balance tests

 Romberg stance/eyes closed, APL [mm]

352 ± 197

387 ± 225

0.578

 Semi tandem stance/eyes closed, APL [mm]

800 ± 268

887 ± 417

0.750

 One-leg stance/eyes open, APL [mm]

786 ± 356

731 ± 276

0.844

Exercise performance tests

 6MWD, m

349 ± 68

360 ± 73

0.621

 6MWD, %predicted

53 ± 10

57 ± 10

0.155

 Knee extension, peak force [N]

267 ± 74

282 ± 99

0.733

 Knee extension, peak force [%predicted]

79 ± 17

87 ± 19

0.249

 Countermovement jump [W/kg]

23.9 ± 5.1

23.3 ± 6.0

0.517

 5-repetition sit-to-stand test [sec.]

13.4 ± 3.9

12.3 ± 4.8

0.091

 1 min sit-to-stand test [rep]

18.3 ± 4.9

19.8 ± 6.5

0.109

 4 m gait speed test [m/s2]

0.90 ± 0.15

0.97 ± 0.15

0.152

  1. Data are presented as mean ± SD or [min/max]
  2. 6MWD 6-min walk distance, APL absolute path length, BMI Body-Mass-Index, FEV1 forced expiratory volume in 1 s, LTOT long-term oxygen therapy, pO2 partial oxygen pressure, WBV whole-body vibration training
  3. #lung function was measured by bodyplethysmography (Master Screen Body, Jaeger, Germany) using reference equations from the Global Lung Function Initiative [26]