From: Study protocol of an equivalence randomized controlled trial to evaluate the effectiveness of three different approaches to collecting Patient Reported Outcome Measures (PROMs) data using the Prostate Cancer Outcomes Registry-Victoria (PCOR-VIC)
Indicator
Targeted response rate
Equivalence margin
Sample size (SS) per group
Internet access
SS adjusted for email
Total Sample required
Response rate
90%
10%
190
83%
229
687