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

Table 7 Comparison between groups in Profile of Mood States (Mann-Whitney and Hedges’ g)

Subscale	Moment	Group	Sample size	mean ± SD	P value	g (Hedges)
Tension	Pre-test	Control	32	8.22 ± 4.52	0.212	0.307
		Experimental	24	6.83 ± 4.36
	Post-test	Control	32	12.47 ± 2.55	0.051	0.623
		Experimental	24	10.92 ± 2.32
Depression	Pre-test	Control	32	4.00 ± 3.48	0.186	0.330
		Experimental	24	2.88 ± 3.18
	Post-test	Control	32	9.03 ± 3.48	0.194	0.399
		Experimental	24	7.75 ± 2.69
Anger	Pre-test	Control	32	11.22 ± 6.33	0.397	0.300
		Experimental	24	9.46 ± 4.95
	Post-test	Control	32	9.88 ± 4.82	0.137	0.452
		Experimental	24	7.88 ± 3.64
Vigour	Pre-test	Control	32	12.88 ± 3.20	0.526	0.112
		Experimental	24	12.54 ± 2.52
	Post-test	Control	32	6.19 ± 2.48	0.591	0.021
		Experimental	24	6.13 ± 3.38
Fatigue	Pre-test	Control	32	6.28 ± 4.03	0.303	0.222
		Experimental	24	5.33 ± 4.44
	Post-test	Control	32	4.88 ± 4.02	0.048a	0.498
		Experimental	24	3.00 ± 3.24

^aP < 0.05.

P: Probability associated with the contrast statistic (Mann-Whitney U test in intergroup comparisons); Hedges’ g: Effect size corrected for independent samples (0.20 = small, 0.50 = medium, 0.80 = large).