Surface electromyography for diagnosing dysphagia in patients with cerebral palsy

Table 2 Surface electromyographic findings for participants in the oropharyngeal dysphagia and control groups after adjusting for body mass index

Characteristic	OPD group(n = 20)	Control group (n = 60)	β1 (SE)	P value
MSV (mL)	3.70 ± 3.01	54.50 ± 24.47	-33.87 (5.32)	< 0.001
At 3 mL swallowing volume
SMGMA (μV)	80.77 ± 65.00	35.02 ± 13.02	38.30 (10.21)	< 0.001
IMGMA (μV)	88.89 ± 78.52	30.23 ± 10.55	44.09 (11.68)	< 0.001
TDBMG (s)	0.35 ± 0.35	0.13 ± 0.12	0.22 (0.06)	< 0.001
ADBMG (μV)	60.59 ± 71.50	10.18 ± 11.49	38.55 (10.84)	< 0.001
At MSV
SMGMA (μV)	100.24 ± 96.96	52.78 ± 28.05	34.90 (16.10)	0.033
IMGMA (μV)	98.28 ± 89.75	51.32 ± 21.78	30.59 (14.20)	0.034
TDBMG (s)	0.35 ± 0.35	0.15 ± 0.15	0.20 (0.07)	0.004
ADBMG (μV)	62.87 ± 73.05	18.75 ± 22.00	33.92 (12.20)	0.007

Data are presented as mean ± SD unless otherwise indicated.

¹Mean difference between experimental and control group adjusted for body mass index (BMI). MSV: Maximum swallowing volume; SMGMA: Submental muscle group maximum amplitude; IMGMA: Infrahyoid muscle group maximum amplitude; TDBMG: Time difference between 2 muscle groups; ADBMG: Amplitude difference between 2 muscle groups; OPD: Oropharyngeal dysphagia.