Only one trial [38] reported a statistical power calculation for one of the primary outcomes (incidence of de novo adhesion formation).
The sample size of n = 60 per group was determined from a power calculation for survival analysis with constant hazard and drop-out rates.
To investigate methods to determine the size of a pilot study to inform a power calculation for a randomized controlled trial (RCT) using an interval/ratio outcome measure.
To test the hypothesis that the refractive outcome of the first eye can be used to improve the intraocular lens (IOL) power calculation for the second eye.
This included recruitment and retention, acceptability of outcome measures patients' and health professionals' views and experiences and a power calculation for a definitive trial.
We performed power calculation for our study.
An asterisk denotes power calculation for a one-tailed test.
In this power calculation for cluster-randomised trials, an intraclass correlation coefficient of 0.04 was used.
The power calculation for this study was rendered difficult by the following factors.
The PHQ-9 data was used for a power calculation for the full RCT.
The power calculation for clustered data analysis assumes an intra-class correlation coefficient (ICC) of 0.04.
