Background There are limited data on the quality of reporting of information essential for
replication of the calculation as well as the accuracy of the sample size calculation. We …

Aim: Appropriate calculation of sample size and choosing the correct sampling technique
are of paramount importance to produce studies that are capable of drawing clinically …

Objective: The objective of this study was to determine whether standard deviations (SDs)
used in sample size calculations are smaller than those found in the resulting study sample …

Objectives To assess quality of reporting of sample size calculation, ascertain accuracy of
calculations, and determine the relevance of assumptions made when calculating sample …

Background Prior sample size calculation is essential to ensure that a randomized
controlled trial (RCT) has enough power to detect any statistical differences between two …

Background: The calculation of the sample size is one of the most important steps in
designing a randomized controlled trial. The purpose of this study is drawing the attention of …

Background The sample size calculation for a randomized controlled trial should assure that
a statistically significant and clinically relevant difference can be detected with a high …

Sample size calculations are advocated by the CONSORT group to justify sample sizes in
randomized controlled trials (RCTs). The aim of this study was primarily to evaluate the …

Purpose Although every randomized clinical trial (RCT) needs participants, determining the
ideal number of participants that balances limited resources and the ability to detect a real …

We have evaluated the pitfalls in reporting sample size calculation in randomized controlled
trials (RCTs) published in the 10 highest impact factor anaesthesia journals. Superiority …