Table 4.

Results of main effects and interaction ANOVA on type III linear mixed models on duration of activation of hyoid muscles during swallowing

Muscle	Factor	F (numerator df, denominator df)	P Value
Left thyrohyoid	Treatment	52.81 (1, 348)	<0.001
(LTH)	IMPAS score	5.32 (2, 348)	0.005
	Treatment:IMPAS	2.19 (2, 348)	0.113
Right thyrohyoid	Treatment	59.06 (1, 540)	<0.001
(RTH)	IMPAS score	1.43 (2, 540)	0.24
	Treatment:IMPAS	2.08 (2, 540)	0.125
Left genioglossus	Treatment	0.96 (1, 227)	0.329
(LGG)	IMPAS score	1.52 (2, 227)	0.221
	Treatment:IMPAS	1.8 (2, 227)	0.167
Right genioglossus	Treatment	<0.01 (1, 244)	0.971
(RGG)	IMPAS score	0.3 (1, 244)	0.741
	Treatment:IMPAS	0.15 (2, 244)	0.863
Left geniohyoid	Treatment	0.36 (1, 85)	0.548
(LGH)	IMPAS score	1.39 (2, 85)	0.256
	Treatment:IMPAS	1.88 (2, 85)	0.16
Right stylohyoid	Treatment	6.5 (1, 176)	0.012
(RStyH)	IMPAS score	0.47 (2, 176)	0.628
	Treatment:IMPAS	3.2 (2, 176)	0.043
Left cricothyroid	Treatment	0.58 (1, 207)	0.445
(LCT)	IMPAS score	1.41 (2, 207)	0.247
	Treatment: IMPAS	0.45 (2, 207)	0.633

Bold F statistics and P values indicate significant differences. IMPAS, infant mammalian penetration aspiration score.