Skip to main content

Table 2 Power calculation for the secondary outcomes

From: Collaborative care for depression in general practice: study protocol for a randomised controlled trial

Secondary outcome

Mean difference (MD)

Standard deviation (SD) of the pooled mean

Type 1 error

Calculated power

BAI

4 (57)

12 (57)

5%

99%

GAF-F

5 (*)

10 (56)

5%

99%

SCL-90-R

23 (55)

50 (55)

5%

99%

  1. Abbreviations: MD mean difference, SD standard deviation, BAI Beck Anxiety Inventory, GAF-F Global Assessment of Functioning, SCL-90-R Symptom Checklist-90-Revised. *The expected mean difference for GAF-F has been conservatively estimated to 5 points as this is considered clinically relevant
Back to article page

Trials

ISSN: 1745-6215