ArticleJournal of biopharmaceutical statistics2020
Precise and accurate power of the rank-sum test for a continuous outcome.
Article in Journal of biopharmaceutical statistics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
16 citing papers in PubMed.
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- Salivary Proteome Profile of Xerostomic Patients Reveals Pathway Dysregulation Related to Neurodegenerative Diseases: A Pilot Study.International journal of molecular sciences · 2025Article
- Evolutionary trends inmSystems · 2025Article
- The relationship between ruminal mat consistency of calves and mortality or immunity.Scientific reports · 2025Article
- Barriers to cardiac rehabilitation and their association with hospital readmission in patients with heart failure.Einstein (Sao Paulo, Brazil) · 2025Observational
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- Minimal Clinically Important Differences (MCID) for the Functional Assessment of Chronic Illness Therapy Fatigue Scale in Patients with Systemic Sclerosis.International journal of environmental research and public health · 2022Article
- False memories formation is increased in individuals with insomnia.Journal of sleep research · 2022Article
- Analysis and Allocation of Cancer-Related Genes Using Vague DNA Sequence Data.Frontiers in genetics · 2022Article
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- Environmental temperature during early life affects the personality of mosquitofish in adulthood.Current zoology · 2021Article
- Computational analyses reveal spatial relationships between nuclear pore complexes and specific lamins.The Journal of cell biology · 2021Article
- Clinical Effectiveness of Monofilament Fibre Pads for Bacterial and Biofilm Removal in Pressure Injuries: A Retrospective Cohort Study.Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair SocietyArticle
Corrections and comments
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Authors and funding
7 authors.
Funding
Abstract
Accurate power calculations are essential in small studies containing expensive experimental units or high-stakes exposures. Herein, power of the Wilcoxon Mann-Whitney rank-sum test of a continuous outcome is formulated using a Monte Carlo approach and defining [Formula: see text] as a measure of effect size, where [Formula: see text] and [Formula: see text] denote random observations from two distributions hypothesized to be equal under the null. Effect size [Formula: see text] fosters productive communications because researchers understand [Formula: see text] is analogous to a fair coin toss, and [Formula: see text] near 0 or 1 represents a large effect. This approach is feasible even without background data. Simulations were conducted comparing the empirical power approach to existing approaches by Rosner & Glynn, Shieh and colleagues, Noether, and O'Brien-Castelloe. Approximations by Noether and O'Brien-Castelloe are shown to be inaccurate for small sample sizes. The Rosner & Glynn and Shieh, Jan & Randles approaches performed well in many small sample scenarios, though both are restricted to location-shift alternatives and neither approach is theoretically justified for small samples. The empirical method is recommended and available in the R package wmwpow.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.