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Power estimation for non-standardized multisite studies

Anisha Keshavan, Friedemann Paul, Mona K. Beyer, Alyssa H. Zhu, Nico Papinutto, Russell T. Shinohara, William Stern, Michael Amann, Rohit Bakshi, Antje Bischof, Alessandro Carriero, Manuel Comabella (+44 others)
2016 NeuroImage  
for their expertise.  ...  Acknowledgments We thank the study participants, MR technicians, and acknowledge Stephane Lehéricy, Eric Bardinet, Frédéric Humbert and Antoine Burgos from the ICM IRM facility (CENIR) and the CIC Pitié-Salpêtriére  ...  Alternatively, multisite studies employing our approach can use the results of our direct-volume calibration (the estimates of CV a for each ROI) to estimate sample sizes based on our proposed power equation  ... 
doi:10.1016/j.neuroimage.2016.03.051 pmid:27039700 pmcid:PMC5656257 fatcat:tmuwjgncnjfjvnghtd2cb6ykq4

The association between multisite musculoskeletal pain and cardiac autonomic modulation during work, leisure and sleep - a cross-sectional study

Tatiana de Oliveira Sato, David M Hallman, Jesper Kristiansen, Andreas Holtermann
2018 BMC Musculoskeletal Disorders  
Autonomic imbalance is a suggested mechanism for multisite pain, but hardly been studied during normal daily living.  ...  The prevention and rehabilitation of multisite musculoskeletal pain would benefit from studies aiming to understand its underlying mechanism.  ...  Acknowledgments We would like to thank the entire DPhacto research team for the project planning, data collection, handling and management.  ... 
doi:10.1186/s12891-018-2312-3 pmid:30458750 pmcid:PMC6247621 fatcat:vmk5wp5lbbacbpntur77rw7mb4

Statistical power and prediction accuracy in multisite resting-state fMRI connectivity

Christian Dansereau, Yassine Benhajali, Celine Risterucci, Emilio Merlo Pich, Pierre Orban, Douglas Arnold, Pierre Bellec
2017 NeuroImage  
We then implemented a series of Monte-Carlo simulations, based on real data, to evaluate the impact of the multisite effects on detection power in statistical tests comparing two groups (with and without  ...  Taken together, our results support the feasibility of multisite studies in rs-fMRI provided the sample size is large enough.  ...  Statistical power and multisite rs-fMRI.  ... 
doi:10.1016/j.neuroimage.2017.01.072 pmid:28161310 fatcat:jqmi7jhnbzggfg4b2ug3a4o7se

Multisite pain and self-reported falls in older people: systematic review and meta-analysis

Victoria K. Welsh, Lorna E. Clarson, Christian D. Mallen, John McBeth
2019 Arthritis Research & Therapy  
Multisite pain and falls are common in older people, and isolated studies have identified multisite pain as a potential falls risk factor.  ...  This study aims to synthesise published literature to further explore the relationship between multisite pain and falls and to quantify associated risks.  ...  The authors are grateful for the assistance from the Systematic Review team at the Arthritis Research UK Primary Care Centre, Keele University for their support with search strategy development and implementation  ... 
doi:10.1186/s13075-019-1847-5 pmid:30795790 pmcid:PMC6387492 fatcat:zmxeezwkhnffnepcdwnfzg7emm

Development of a standardized MRI protocol for pancreas assessment in humans

John Virostko, Richard C. Craddock, Jonathan M. Williams, Taylor M. Triolo, Melissa A. Hilmes, Hakmook Kang, Liping Du, Jordan J. Wright, Mara Kinney, Jeffrey H. Maki, Milica Medved, Michaela Waibel (+7 others)
2021 PLoS ONE  
The purpose of this study was to develop a standardized MRI protocol for pancreas imaging and to define the reproducibility of these measurements.  ...  In contrast, non-standardized image processing led to greater variation in MRI measurements.  ...  of study coordination.  ... 
doi:10.1371/journal.pone.0256029 pmid:34428220 pmcid:PMC8384163 fatcat:xb3jrhjgizcshjxrwvp4ouz5te

Statistical power and optimal design for multisite randomized trials

Stephen W. Raudenbush, Xiaofeng Liu
2000 Psychological methods  
To consider power implications, this article proposes a standardized hierarchical linear model and uses rules of thumb similar to those proposed by J.  ...  Cohen (1988) for small, medium, and large effect sizes and for small, medium, and large treatment-by-site variance.  ...  Standardized Model for Two Groups There are good reasons to translate our general model for the multisite trial into a model that includes standardized effect sizes (Cohen, 1988; Glass, 1976) and their  ... 
doi:10.1037//1082-989x.5.2.199 fatcat:47v6ivsa45gnrmuvqzknrj2oyi

Statistical power and optimal design for multisite randomized trials

Stephen W. Raudenbush, Xiaofeng Liu
2000 Psychological methods  
To consider power implications, this article proposes a standardized hierarchical linear model and uses rules of thumb similar to those proposed by J.  ...  Cohen (1988) for small, medium, and large effect sizes and for small, medium, and large treatment-by-site variance.  ...  Standardized Model for Two Groups There are good reasons to translate our general model for the multisite trial into a model that includes standardized effect sizes (Cohen, 1988; Glass, 1976) and their  ... 
doi:10.1037/1082-989x.5.2.199 pmid:10937329 fatcat:dacwncsksncerjcpvpjyubxyi4

Examining Effects of a Multisite Youth Outreach Program: A Meta-analysis Approach

Weiling Li, Martha Lindley McDavid, Sandra F. San Miguel, Loran Carleton Parker
2021 Journal of Youth Development  
The application of meta-analysis for examining the impact of other multisite youth programs encountering similar data analysis challenges is discussed.  ...  The meta-analysis method revealed details of the underlying variation between sites that could be masked by typical regression approaches, estimated overall program effects, examined subgroups and identified  ...  In this multisite study, given the assumption that sites are estimating different yet related project effects, and sites with small sample sizes are important for us too, we decided in advance to pool  ... 
doi:10.5195/jyd.2021.1055 pmid:34632465 pmcid:PMC8496882 fatcat:4jcmfhlc5zfbhhs23oq4wzlbkm

Activity energy expenditure assessment system based on activity classification using multi-site triaxial accelerometers

Kim Dongwoo, Hee Chan Kim
2007 IEEE Engineering in Medicine and Biology Society. Conference Proceedings  
Wireless networked multisite triaxial accelerometry system was proposed to estimate activity energy expenditure during daily life.  ...  The estimation results showed higher correlation (R 2 = 0.98) and smaller standard errors of estimation (SEE = 0.66 kcal) than any other system in preceding reports.  ...  Table. 1 Correlation, standard errors of estimation (SEE) and optimized weight vectors for each of regression model V.  ... 
doi:10.1109/iembs.2007.4352781 pmid:18002447 fatcat:edhimaawzrbmbn4tsrtcv2qyg4

FedHarmony: Unlearning Scanner Bias with Distributed Data [article]

Nicola K Dinsdale, Mark Jenkinson, Ana IL Namburete
2022 arXiv   pre-print
The ability to combine data across scanners and studies is vital for neuroimaging, to increase both statistical power and the representation of biological variability.  ...  studies.  ...  FL has the potential to become the standard paradigm for multisite imaging, with early studies demonstrating its feasibility in neuroimaging [18] .  ... 
arXiv:2205.15970v1 fatcat:7u65zr6ss5flvggzdfqbt46ktu

Stochastic Precipitation Generation Based on a Multivariate Autoregression Model

Oleg V. Makhnin, Devon L. McAllister
2009 Journal of Hydrometeorology  
The estimated parameter values for these distributions are given in Table 1 . For example, the values of µ and β are higher for the total precipitation.  ...  Challenges of modeling and statistical tools used for assessment Some descriptive statistics for both multisite occurrence and intensity were offered by Wilks (1998) .  ...  Multisite model We fit the Multisite model for several months in each study area.  ... 
doi:10.1175/2009jhm1103.1 fatcat:tipi5vb5ojh4ved47uywvkoojy

Modeling Site Effects in the Design and Analysis of Multi-site Trials

Daniel J. Feaster, Susan Mikulich-Gilbertson, Ahnalee M. Brincks
2011 The American Journal of Drug and Alcohol Abuse  
Statistical power considerations Statistical power for clinical trials using the fixed site effects models can be estimated using standard methods (e.g., 40 ).  ...  Ignoring site effects Ignoring site may also bias the estimate of the standard error of the treatment effect if there is a non-trivial tendency for participants within a site to be more similar on the  ... 
doi:10.3109/00952990.2011.600386 pmid:21854281 pmcid:PMC3281513 fatcat:s4efvtk55za6vcvka57mjtbviy

Reliability of an fMRI paradigm for emotional processing in a multisite longitudinal study

Dylan G. Gee, Sarah C. McEwen, Jennifer K. Forsyth, Kristen M. Haut, Carrie E. Bearden, Jean Addington, Bradley Goodyear, Kristin S. Cadenhead, Heline Mirzakhanian, Barbara A. Cornblatt, Doreen Olvet, Daniel H. Mathalon (+12 others)
2015 Human Brain Mapping  
Multisite neuroimaging studies can facilitate the investigation of brain-related changes in many contexts, including patient groups that are relatively rare in the general population.  ...  Though multisite studies have characterized the reliability of brain activation during working memory and motor functional magnetic resonance imaging tasks, emotion processing tasks, pertinent to many  ...  multisite studies.  ... 
doi:10.1002/hbm.22791 pmid:25821147 pmcid:PMC4478164 fatcat:voizasgkgfckjhfkgqoovsqpaa

Multisite reliability of MR-based functional connectivity

Stephanie Noble, Dustin Scheinost, Emily S. Finn, Xilin Shen, Xenophon Papademetris, Sarah C. McEwen, Carrie E. Bearden, Jean Addington, Bradley Goodyear, Kristin S. Cadenhead, Heline Mirzakhanian, Barbara A. Cornblatt (+14 others)
2017 NeuroImage  
The limited effects of site and scanner manufacturer support the use of multisite studies, such as NAPLS, as a viable means of collecting data on rare populations and increasing power in univariate functional  ...  While multisite studies provide an efficient way to accelerate data collection and increase sample sizes, especially for rare clinical populations, any effects of site or MRI scanner could ultimately limit  ...  Increased power through collection of more fMRI data-both more subjects and more data per subject-is always beneficial and this study suggests that adding data from multiple sites in a multisite study  ... 
doi:10.1016/j.neuroimage.2016.10.020 pmid:27746386 pmcid:PMC5322153 fatcat:35uf4ybpgfarpj7bkdgvdohwwe

Page 2832 of Psychological Abstracts Vol. 87, Issue 8 [page]

2000 Psychological Abstracts  
(U Michigan, School of Education, Ann Arbor, MI) Statistical power and optimal design for multisite randomized trials. Psychological Methods, 2000(Jun), Vol 5(2), 199-213.  ...  (ACT, Inc., lowa City, LA) Estimators of conditional scale-score standard errors of measurement: A simulation study. Journal of Ed- ucational Measurement, 2000(Spr), Vol 37(1), 1-20.  ... 
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