Collaborative care for panic disorder, generalised anxiety disorder and social phobia in general practice: study protocol for three cluster-randomised, superiority trials

Table 1 Power calculations for the secondary outcomes

Secondary outcomes	Mean difference (MD)	Standard deviation (SD) of the pooled mean	Type 1 error	Calculated power
BDI-II	4 [77]	11 [36, 77]	5%	93%
GAF-F	5^a	11 [71]	5%	99%
SCL-90-R	23 [72]	50 [72]	5%	99%

^aFor the GAF-F the expected mean difference has been conservatively estimated to be 5 points as this is considered clinically relevant
BDI Beck Depression Inventory, GAF Global Assessment of Functioning, SCL Symptom Checklist

ISSN: 1745-6215