Table 4.

Within-group effects in CO and EC

	CO			EC
	d [95%-CI]	t (106)	p value	d [95%-CI]	t (110)	p value
Gambling daysa	1.34 [0.92 to 1.76]	6.96	< 0.001	1.44 [1.02 to 1.86]	7.64	< 0.001
Problem gambling (PGSI)	2.48 [1.97 to 2.98]	12.86	< 0.001	1.72 [1.28 to 2.15]	9.08	< 0.001
Highest stake (Euro)a	1.12 [0.71 to 1.53]	5.84	< 0.001	0.52 [0.14 to 0.90]	2.77	0.003
Well-being (WHO-5)	1.73 [1.28 to 2.17]	8.96	< 0.001	1.04 [0.64 to 1.44]	5.51	< 0.001

Positive effect sizes refer to beneficial outcomes

^aDuring the past 30 days