Table 7Study Power Based on Original Planned Enrollment of 250 Patients

OutcomeMCIDPower of study to detect MCIDDifference expected based on previous studiesMinimum difference for which study has > 80% power
SF-CRQ total1.00.990.73-2.000.33
SF-CRQ dyspnea0.50.880.76-1.060.45
No. of exacerbations22%0.9020%-26%20%

Abbreviation: MCID, minimal clinically important difference; SF-CRQ, Short-form Chronic Respiratory Disease Questionnaire.

From: Does Working with a Health Coach Help Patients with COPD Improve Their Quality of Life and Breathe Easier?

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Does Working with a Health Coach Help Patients with COPD Improve Their Quality of Life and Breathe Easier? [Internet]
Thom DH, Su G, Hessler D, et al.
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