Table 2 Comparison in the LEMG results of IVFP patients with various disease courses.

From: The impact of synkinesis on voice restoration in idiopathic vocal fold paralysis patients with different disease courses

Parameter

Course of disease (months)

t

p

Cohen´s d

 < 3 (n = 85)

3–6 (n = 45)

MD

95% CI

SLN

Latency (ms)

2.04 ± 1.24

2.01 ± 1.13

0.03

− 0.60, 0.66

0.085

0.932

0.022

Amplitude (mV)

8.27 ± 7.29

6.90 ± 5.14

1.37

− 2.14, 4.88

0.779

0.439

0.204

RLN

Latency (ms)

1.77 ± 0.98

2.30 ± 1.69

− 0.53

− 1.39, 0.32

− 1.285

0.212

− 0.436

Amplitude (mV)

2.72 ± 3.00

3.92 ± 5.76

− 1.20

− 4.08, 1.69

− 0.860

0.399

− 0.302

CT

APD (ms)

10.71 ± 3.10

9.23 ± 4.03

1.48

− 0.53, 3.49

1.502

0.143

0.435

Amplitude (mV)

0.52 ± 0.21

0.49 ± 0.28

0.03

− 0.09, 0.15

0.514

0.609

0.137

TA

APD (ms)

9.56 ± 2.64

8.24 ± 3.85

1.32

− 0.66, 3.29

1.376

0.181

0.438

Amplitude (mV)

0.42 ± 0.25

0.34 ± 0.11

0.08

− 0.01, 0.17

1.716

0.091

0.339

PCA

APD (ms)

10.29 ± 2.77

8.24 ± 3.05

2.05

0.52, 3.59

2.667

0.010

0.721

Amplitude (mV)

0.47 ± 0.28

0.37 ± 0.13

0.10

0.00, 0.20

1.523

0.133

0.412

  1. APD, action potential periods; CI, confidence interval; CT, cricothyroid muscle; IVFP, idiopathic vocal fold paralysis; LEMG, laryngeal electromyography; MD, mean difference; PCA, posterior cricoarytenoid muscle; TA, thyroarytenoid muscle; RLN, recurrent laryngeal nerve; SLN, superior laryngeal nerve.
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