Sentence examples for based our sample size from inspiring English sources
We based our sample size estimation on previous explorative laboratory analyses (unpublished data) investigating the volume of secretions present within ETTs after extubation by CT scan.
As French data on SA carriage among athletes were lacking, we based our sample size on American data; we therefore overestimated the carriage proportion, which partly explains the lack of statistical power.
We initially based our sample size calculation on data from the Yang study (Yang et al. 2014) (measuring BCB in an Asian population) and the Cavaignac study (Cavaignac et al. 2016) (measuring BCB in a European population).
In contrast to the CVLT results from bipolar patients published by Martinez-Aran et al. ([2004]) and Fleck et al. ([2003]) (upon which we based our sample size estimation), our patients were a total of only about 6% worse than the healthy controls.
Given that our methods and theirs differed substantially and our desire to be conservative, we based our sample size on the desire to be able to find an effect size that was half of theirs (.81) with power of.95, yielding a target total sample size of 41 observers per condition (see Table 1 for number of observers and stimuli used for each experiment).
For this pilot study, we based our sample size on the number of participating centres and the minimum weekly recruitment per centre that we would tolerate if the true incidence rate was 20% (yielding a sample size of 1250 for a 25% relative risk reduction, 5% type I error rate, and 90% power).
A proper sample size calculation is difficult in the absence a prior information on the variances on the responses - we based our sample sizes on previous similar studies, e.g. in Ghana [ 23] and Nepal [ 24] that also included a limited number of respondents.
There are no existing data on 'guideline consistent' responses on which we could base our sample size calculation.
This seemed acceptable because we had no previous importance ratings on which to base our sample size calculations.
