Zhang Yiran, Hedo Rita, Rivera Anna, Rull Rudolph, Richardson Sabrina, Tu Xin M
Department of Family Medicine and Public Health, University of California System, Oakland, California, USA.
Naval Health Research Center, San Diego, California, USA.
Gen Psychiatr. 2019 Aug 8;32(4):e100069. doi: 10.1136/gpsych-2019-100069. eCollection 2019.
Power analysis is a key component for planning prospective studies such as clinical trials. However, some journals in biomedical and psychosocial sciences ask for power analysis for data already collected and analysed before accepting manuscripts for publication. In this report, post hoc power analysis for retrospective studies is examined and the informativeness of understanding the power for detecting significant effects of the results analysed, using the same data on which the power analysis is based, is scrutinised. Monte Carlo simulation is used to investigate the performance of posthoc power analysis.
功效分析是规划前瞻性研究（如临床试验）的关键组成部分。然而，生物医学和心理社会科学领域的一些期刊在接受稿件发表之前，要求对已收集和分析的数据进行功效分析。在本报告中，我们对回顾性研究的事后功效分析进行了检验，并审视了使用功效分析所基于的相同数据来理解检测已分析结果显著效应的功效的信息量。蒙特卡洛模拟用于研究事后功效分析的性能。
