Table 2 Comparison of reactance and resistance values at 50 and 100 kHz in patients with FOP versus healthy controls.

From: Diminished muscle integrity in patients with fibrodysplasia ossificans progressiva assessed with at-home electrical impedance myography

Parameter

Body part

Statistics

FOP (N = 15)

Healthy controls (N = 13)

Reactance 50 kHz

Whole body

Mean (SD)

1.8 (1.62)

3.8 (0.66)

Median

1.5

4.1

P-value

0.0052

 

Effect size

1.62

 

Left upper

Mean (SD)

2.3 (1.78)

4.5 (0.72)

Median

2.2

4.4

P-value

0.0016

 

Effect size

1.63

 

Right upper

Mean (SD)

2.0 (2.44)

4.3 (0.67)

Median

2.0

4.6

P-value

0.0023

 

Effect size

1.33

 

Left lower

Mean (SD)

1.8 (1.90)

3.4 (1.04)

Median

1.7

3.6

P-value

0.0238

 

Effect size

1.06

 

Right lower

Mean (SD)

1.4 (1.78)

3.3 (0.74)

Median

1.2

3.1

P-value

0.0091

 

Effect size

1.38

 

Reactance 100 kHz

Whole body

Mean (SD)

2.8 (1.47)

4.2 (0.62)

Median

2.1

4.4

P-value

0.0082

 

Effect size

1.24

 

Left upper

Mean (SD)

3.3 (1.65)

4.8 (0.59)

Median

3.0

4.8

P-value

0.0091

 

Effect size

1.22

 

Right upper

Mean (SD)

2.9 (2.14)

4.7 (0.66)

Median

2.5

4.8

P-value

0.0141

 

Effect size

1.13

 

Left lower

Mean (SD)

2.7 (1.60)

3.7 (0.85)

Median

3.0

3.9

P-value

0.0697

 

Effect size

0.78

 

Right lower

Mean (SD)

2.4 (1.60)

3.6 (0.63)

Median

1.9

3.7

P-value

0.0323

 

Effect size

1.05

 

Resistance 50 kHz

Whole body

Mean (SD)

31.4 (11.20)

23.5 (7.35)

Median

26.2

22.1

P-value

0.0527

 

Effect size

 − 0.84

 

Left upper

Mean (SD)

33.4 (11.60)

25.8 (9.70)

median

31.1

24.0

P-value

0.0697

 

Effect size

 − 0.71

 

Right upper

Mean (SD)

32.7 (12.73)

24.5 (7.65)

Median

24.5

22.2

P-value

0.0914

 

Effect size

 − 0.79

 

Left lower

Mean (SD)

30.8 (10.88)

21.6 (6.18)

Median

27.3

21.1

P-value

0.0264

 

Effect size

 − 1.04

 

Right lower

Mean (SD)

28.3 (10.59)

21.1 (6.35)

Median

24.8

19.5

P-value

0.0636

 

Effect size

 − 0.82

 

Resistance 100 kHz

Whole body

Mean (SD)

30.0 (11.63)

21.0 (7.62)

Median

24.6

19.7

P-value

0.0394

 

Effect size

 − 0.91

 

Left upper

Mean (SD)

31.8 (11.82)

23.0 (9.97)

Median

30.2

20.6

P-value

0.0323

 

Effect size

 − 0.81

 

Right upper

Mean (SD)

31.2 (13.15)

21.8 (7.89)

Median

24.3

19.9

P-value

0.0527

 

Effect size

 − 0.86

 

Left lower

Mean (SD)

29.5 (11.56)

19.5 (6.52)

Median

26.6

19.8

P-value

0.0264

 

Effect size

 − 1.07

 

Right lower

Mean (SD)

27.0 (11.11)

18.8 (6.58)

Median

23.6

16.2

P-value

0.0357

 

Effect size

 − 0.90

 
  1. SD standard deviation.
  2. P-value derived from a Wilcoxon two-sample test comparing the mean difference between FOP patients and healthy controls.
  3. Effect Size (Mean of Healthy Control − mean of FOP Patients)/Pooled STD; Pooled STD = sqrt[(std12 + std22)/2] std1 and std2 are the standard deviation of Healthy Control and FOP, respectively.