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Where possible, experiments were designed with a sample size calculated from preliminary data to yield a power of B = 0.8.
The two-tailed T test with n = 58/group would then yield a power of 82%%.
A significance level set at α = 0.05 and 65 patients per arm yield a power of 0.80 [ 56].
The largest effect estimate in this paper, observed in the sensitivity analysis, was r = 0.23, for which 30 participants would yield a power of 0.23.
Given a medium effect size of 0.15, significance of 5% and 5 independent variables, this would yield a power of 0.97.
Assuming a 2.5-fold increase in risk of P2/DY mammographic patterns from the lowest quintile of a quantitative factor to the highest, 200 cases and 200 controls will yield a power of approximately 90%.
Similar(44)
Considering a similar effect size and since we enrolled 38 patients, our study yields a power of 80.4 % with α = 0.05.
Despite, the small size, a power analysis using the eight study subjects and three control subjects yielded a power of 0.91 to determine differences in the percentage of cells staining positive for NO and apoptosis between the control and fracture groups.
The majority of the simulation scenarios yielded a power of more than 70%.
Analysis of estimated sample size was performed and yielded a power of 90%.
For the primary analyses, the sample of 320 youth yielded a power of 90% for HbA1c and 82% for QOL.
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CEO of Professional Science Editing for Scientists @ prosciediting.com