Collaborative care vs consultation liaison for depression and anxiety disorders in general practice: study protocol for two randomized controlled trials (the Danish Collabri Flex trials)

Table 4 Power calculation for secondary outcomes in the anxiety trial

	δ value for clinically relevant difference	α value for type I error	σ value for the within-group SD	Calculated power	Reference
BDI-II	4	0.05 (5%)	11	0.863 (86.3%)	[66,67,68,69]
SDS	4	0.05 (5%)	10	0.920 (92.0%)	[51, 52, 71]
SCL-90-R	23	0.05 (5%)	50	0.972 (97.2%)	[72]
WHO-5	10	0.05 (5%)	26	0.898 (89.8%)	[55, 73] SD is based on data from the Collabri anxiety trial (not published)

BDI-II Beck Depression Inventory II, SCL-90-R Symptom Checklist 90-Revised, SD standard deviation, SDS Sheehan Disability Scale, WHO-5 World Health Organization-Five Well-being Index

ISSN: 1745-6215