Post hoc power analysis: is it an informative and meaningful analysis?
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 analy...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMJ Publishing Group
2019-08-01
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| Series: | General Psychiatry |
| Online Access: | https://gpsych.bmj.com/content/32/4/e100069.full |
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| _version_ | 1850062465114570752 |
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| author | Xin M Tu Sabrina Richardson Yiran Zhang Rita Hedo Anna Rivera Rudolph Rull |
| author_facet | Xin M Tu Sabrina Richardson Yiran Zhang Rita Hedo Anna Rivera Rudolph Rull |
| author_sort | Xin M Tu |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-b369021679504ab09d81ebd68506aecb |
| institution | DOAJ |
| issn | 2517-729X |
| language | English |
| publishDate | 2019-08-01 |
| publisher | BMJ Publishing Group |
| record_format | Article |
| series | General Psychiatry |
| spelling | doaj-art-b369021679504ab09d81ebd68506aecb2025-08-20T02:49:55ZengBMJ Publishing GroupGeneral Psychiatry2517-729X2019-08-0132410.1136/gpsych-2019-100069Post hoc power analysis: is it an informative and meaningful analysis?Xin M Tu0Sabrina Richardson1Yiran Zhang2Rita Hedo3Anna Rivera4Rudolph Rull52 Division of Biostatistics and Bioinformatics, Herbert Wertheim School of Public Health and Human Longevity Science, UC San Diego, La Jolla, California, USA2 Naval Health Research Center, San Diego, California, USADepartment of Neurology, National Center for Neurological Disorders, National Clinical Research Centre for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China1 Department of Family Medicine and Public Health, University of California System, Oakland, California, USA2 Naval Health Research Center, San Diego, California, USA2 Naval Health Research Center, San Diego, California, USAPower 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.https://gpsych.bmj.com/content/32/4/e100069.full |
| spellingShingle | Xin M Tu Sabrina Richardson Yiran Zhang Rita Hedo Anna Rivera Rudolph Rull Post hoc power analysis: is it an informative and meaningful analysis? General Psychiatry |
| title | Post hoc power analysis: is it an informative and meaningful analysis? |
| title_full | Post hoc power analysis: is it an informative and meaningful analysis? |
| title_fullStr | Post hoc power analysis: is it an informative and meaningful analysis? |
| title_full_unstemmed | Post hoc power analysis: is it an informative and meaningful analysis? |
| title_short | Post hoc power analysis: is it an informative and meaningful analysis? |
| title_sort | post hoc power analysis is it an informative and meaningful analysis |
| url | https://gpsych.bmj.com/content/32/4/e100069.full |
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