Effectiveness of a cognitive behavioural intervention on mental health in young footballers: A quasi-experimental study

Table 6 Pre-post changes by group in Profile of Mood States (Wilcoxon and Rosenthal’s r), mean ± SD

Subscales	Group	Pre-test	Post-test	Z (Wilcoxon)	P value	r (Rosenthal)
Tension	Control	8.22 ± 4.52	12.47 ± 2.55	-3.820	< 0.001c	-0.68
	Experimental	6.83 ± 4.36	10.92 ± 2.32	-3.260	0.001c	-0.67
Depression	Control	4.00 ± 3.48	9.03 ± 3.48	4.504	< 0.001c	0.80
	Experimental	2.88 ± 3.18	7.75 ± 2.69	-3.564	< 0.001c	-0.73
Anger	Control	11.22 ± 6.33	9.88 ± 4.82	0.891	0.373	0.16
	Experimental	9.46 ± 4.95	7.88 ± 3.64	-1.631	0.103	-0.33
Vigour	Control	12.88 ± 3.20	6.19 ± 2.48	-4.595	< 0.001c	-0.81
	Experimental	12.54 ± 2.52	6.13 ± 3.38	-4.021	< 0.001c	-0.82
Fatigue	Control	6.28 ± 4.03	4.88 ± 4.02	-1.832	0.067	-0.32
	Experimental	5.33 ± 4.44	3.00 ± 3.24	-2.553	0.011a	-0.52

^aP < 0.05.

^cP < 0.001.

Z: Test statistics of the Wilcoxon signed-rank test (normal approximation); P: Probability value associated with the within-group comparison; Rosenthal’s r: Effect size calculated from Z and n (|10| = small, |30| = medium, |50| = large).