A sample of 100 patients was used for our study. Assuming a 90% satisfaction
rate with day case hysteroscopy, the size of this sample would give an
85% power of detecting a 25% difference in satisfaction rates between day
case hysteroscopy and outpatient hysteroscopy, accepting a 5% type 1 error.
Analysis was by intention to treat.
BMJ December 06, 2016, 355 i6554; DOI: https://doi.org/10.1136/bmj.i6554
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