Surface electromyography for diagnosing dysphagia in patients with cerebral palsy

Table 3 Spearman’s partial correlations between Dysphagia Outcome and Severity Scale score and surface electromyographic findings after adjusting for body mass index (n = 79¹)

Characteristic	Correlation coefficient	P value
At 3 mL swallowing volume
SMGMA (μV)	-0.329	0.003
IMGMA (μV)	-0.389	< 0.001
TDBMG (s)	-0.153	0.182
ADBMG (μV)	-0.353	0.002
At MSV
SMGMA (μV)	-0.117	0.309
IMGMA (μV)	-0.056	0.626
TDBMG (s)	-0.168	0.140
ADBMG (μV)	-0.193	0.091

¹One patient with a missing Dysphagia Outcome and Severity Scale score value was omitted from this analysis. 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.