It is also possible that the differences observed in the principal study end point (length of hospitalization) might have achieved greater statistical significance in a larger population.
Given the wide variability in hospital stay among dyspneic patients, to prove at a significance level of p<.05 that echocardiography was responsible for shortening this stay by the observed mean of 2.3 days (with a 90 percent likelihood of detecting such a difference), would require testing of well over 900 patients. Thus, while some benefit from echo cannot be entirely excluded by this study, it can be concluded that the overall impact of echo in the patients tested was small. buy levaquin online Continue reading