Exact(12)
Sample size for study 2 was calculated based on the primary outcome of wait time for surgery (Trials Registration # NCT00911638).
Our sample size for Study Two was limited and larger studies may identify further differences in the playground behavior of White British and British Pakistani girls.
A limitation to this study is the small sample size for study of the effects of relatively low levels of lead exposure.
The sample size for Study 1 was calculated using the Schlesselmann formula [ 25] for known population sizes, taking 0.05 as the maximum permissible error (reliability of 95%).
Our method can be viewed as a type of sample size determination (SSD) method that determines sample size for study design.
Firstly, the sample size for study one was small, and although the relevance of the themes identified was tested on a larger sample in study two, caution about the generalizability of these findings is still called for.
Similar(48)
The overall mean sample size for studies in the CDSR is 513.
First, with over 1.6 million children this study had a relatively large size for studying childhood cancers, which are rare.
In practice, the critical task of selecting a sample size for studies with repeated measures can be daunting.
Second, the sample size for studies investigating diagnostic biomarkers for PDAC is relatively small (median sample size, n = 48 from 57 articles).
The sample size calculations were based on standard formulas for calculating sample size, for studies comparing binomial proportions using the statistical package "R" (Library Hmisc).
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