Exact(37)
Sample size calculations were powered to detect a 30% improvement in per capita expenditure one year after cataract surgery, with an alpha of 0.05 and 80% power and necessitated a sample of 100 cases examined at baseline and follow-up in each country.
None of these studies reported results for falls and none were powered to do so.
Neither were powered to look at mortality and only one patient died (after rectal treatment).
None of the studies were powered to detect changes a priori.
We were powered to detect clinically significant changes in LVMI, BAR, TAC and CIMT.
No intervention reported results for falls and none were powered to do so.
Similar(23)
Neither trial was powered to assess mortality effect [7].
Thankfully more studies are being powered to answer these questions.
The study is powered to detect relatively large effect sizes.
Therefore, we are powered to detect a much smaller difference.
Sample size calculations are powered to detect change in A1c.
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