Table 6.

Power calculation for linear secondary outcomes

Outcome	δ clinically relevant difference in mean	σ expected standard deviation	α	Power	Test	Reference
Difference in depressive symptoms measured by Beck Depression Inventory (BDI)	4	11	0.0167	0.893	t test	[81–86]
Difference in anxiety symptoms measured by Beck Anxiety Inventory (BAI)	4	12	0.0167	0.826	t test
Difference in stress symptoms measured by Cohen’s Perceived Stress Scale (PSS)	5	8	0.0167	1.000	t test	[87–89]
Social- and work-related function measured by WSAS	4	10	0.0167	0.946	t test	[90]

WSAS Work and Social Adjustment Scale