We are writing in regard to an article published on May 18, 2016, by T. Kawazu et al titled "Aerobic Exercise Combined with Noninvasive Positive Pressure Ventilation Increases Serum Brain-Derived Neurotrophic Factor in Healthy Males."
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Σάββατο 15 Σεπτεμβρίου 2018
Re: Aerobic Exercise Combined with Noninvasive Positive Pressure Ventilation Increases Serum Brain-Derived Neurotrophic Factor in Healthy Males by Kawazu et al
Academy News – September PM&R
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A Checklist for Analyzing Data
Understandably, when researchers get data, they are eager to learn what the data have to say regarding the main study hypotheses. This excitement, combined with looming deadlines, can result in researchers skipping the most important steps of a data analysis. For example, researchers might rush to run formal statistical tests that compare their groups before they have properly cleaned and vetted their data. In a proper data analysis, the bulk of an analyst's time is not spent on running final statistical models, but rather on tasks such as cleaning, checking, understanding, and plotting the data.
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Reply
We thank Barnett and colleagues for their interest in our study. In their letter to the Editor, they asked for clarification on a number of points. The points are as follows: (1) clarify the inclusion/exclusion criteria, the manner in which subjects were randomized, and if allocation concealment or blinding of any party occurred; (2) clarify the process in determining the intensity level and duration of exercise; (3) clarify the basis by which the authors settled on a 3-week washout period, and if there is evidence to support their claim that the time period was sufficient; (4) provide the data used in their calculations—including the t value, standard error of the mean, and the degrees of freedom—and the manner in which these data were used to conclude a significant effect.
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