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17 All 18 studies specified the sample size and characteristics of the participants.
The authors do not do so; the error of the press in doing so might have been avoided if the authors had specified the sample size in the abstract and presented more comment on the reliability of these specific data.
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The 22% of studies used a sample size lower than 15 and the 15% did not specify the sample size in the abstract.
Seven RCTs only stated the total sample size and did not specify the sample size of each group at the randomisation period.
The health-related QoL was studied in acute lymphoblastic leukaemia, myelofibrosis or unclassified leukaemia patients, but the authors did not specify the sample size of patients per diagnosis.
The basic approach is a standard one (Glasserman 2003) and consists of three steps: Specify the sample sizes in the AFS and a demographic model.
The final analysis will be evaluated at the significance level specified in the sample size calculation i.e. p < 0.05.
Where random sampling has been used, in many cases the sampling frame is not clearly specified or the sample size is insufficient to provide robust estimates of prevalence or associations with risk factors.
We used a cluster level model to analyse the trial data as this was the analytical model specified for the sample size formula 17 and is the method recommended by Hayes and Moulton 26 for pair matched trials with fewer than 15 clusters per arm.
In this paper, we apply the bootstrap method for calculating the lower confidence bounds of the index CTPU, and determine the sample size for a specified estimation accuracy.
These trainings were done at the beginning of each study, and at specified milestones for instance, after recruitment of a specified percentage of the sample size.
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