Design and Methods for a Pilot Study of a Phone-Delivered, Mindfulness-Based Intervention in Patients with Implantable Cardioverter Defibrillators

Table 2

Sample size calculations^§.

Measure	Instrument	Definition	Hypothesized mean (SD) control group	Hypothesized mean (SD) intervention group	Sample size (total)
Anxiety	HADS	Mean differences between baseline and postintervention	3.0 (2.2)	5.1 (2.6)	42

^§Null hypothesis Ho = mean difference in pre- /post-HADS score in intervention group = mean difference in pre- /post-HADS score in control group; α (two-tailed) = 0.05 and 1− β = 0.8.