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Table 8 Required per arm sample size at P= 0.05 and 0.9 power

From: A pilot randomised controlled trial of a Telehealth intervention in patients with chronic obstructive pulmonary disease: challenges of clinician-led data collection

Relative reduction Absolute reduction in number of admissions per 100 discharges Sample size per arm
10% 3 4,240
15% 5 1,517
20% 7 768