Effect of external and internal cues on core muscle activation during the Sahrmann five-level core stability test

Table 3 Summary of linear mixed effects model; main effects and interactions

Effect	P value	df	F
Cueing (with and without cue)	0.014a	1, 1922.96	5.99
Cue type (external and internal cue)	0.1306	1, 2.3438	65.80
Muscle groups (TA/IO, EO and RA)	0.000b	2, 1922.97	19.80
Exercise levels (level 1, II, III, IV, V)	0.0001b	4, 1922.96	67.19
Cueing and muscle interaction	0.177	2, 1922.95	1.73
Cueing and exercise level interaction	0.009a	4, 1922.93	3.35
Muscle and exercise level interaction	0.018a	4, 1922.93	2.30
Cueing and muscle and exercise level interactions	0.091	4, 1922.93	1.71

^aP < 0.05;

^bP < 0.01.

Note 1: Model terms was tested with Satterwhite method. Note 2 The following variable is used as a random-effects grouping factor “id”. Note 3 Type III Sum of Squares.