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Table 2 Power calculations for secondary outcomes, calculated from a sample size of 324 participants

From: The effect of IPS-modified, an early intervention for people with mood and anxiety disorders: study protocol for a randomised clinical superiority trial

Measure

Mean difference

Standard deviation of the pooled mean

Type I error

Reference

Power

No of days of competitive employment of education at 12 months

60 days

150 days

5%

Kin W 2008 [21], Burns 2007 [14]

95%

GAF-F

5

15

5%

Hoffmann 2011 [19], Howard 2010 [58]

85%

WHO-5

10

19

5%

Latimer 2006 [22], Burns 2009 [14]

99%

HAM-D6

2

4

5%

Wang 2007 [10], Lexis 2011 [9], Brouwers 2006 [1], Van Oostrom 2010 [59]

99%

HAM-A6

2

4

5%

Wang 2007 [10], Lexis 2011 [9], Brouwers 2006 [1], Van Oostrom 2010 [59]

99%

  1. GAF, Global Assessment of Functioning; HAM-A6, Hamilton Anxiety Scale; HAM-D6, Hamilton Depression Scale; WHO-5, WHO-Five Well-being Index.