请问各位前辈先进 刚刚在阅读一篇paper时不懂其中一段文章 Based on the estimate of PRIS we identified in our study, and assuming a power of 80% and a P < 0.05, a future comparative (i.e., propofol vs. non-propofol) trial would require 2068 patients in each arm to detect a 70% relative decrease in the incidence of PRIS and 10,795 patients in each group to detect a 25% relative decrease in the incidence of PRIS. 请问这篇文章是在说自己的power(指效度吗) 然後之後为什麽各需要2068人和 10795人去 dectect 各70%和50% 的relative decrease in the incidence呢 完全不懂~~@_@ 请问上一段是什麽意思呢 relative decrease in the incidence又是什麽意思呢 是relative risk吗? --

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