How many repeated measures in repeated measures designs? Statistical issues for comparative trials
BMC Medical Research Methodology, 2003 Background In many randomized and non-randomized comparative trials, researchers measure a continuous endpoint repeatedly in order to decrease intra-patient variability and thus increase statistical power. There has been little guidance in the literature
Vickers Andrew J
doaj +1 more source
Gonadal proliferation and reproductive cycle of the exotic sea squirt Cnemidocarpa amphora () (Pleurogona, Styelidae) sampled for the first time from the northern coast of Arabian Gulf in Saudi Arabia [PDF]
Brazilian Journal of Biology, 2023 Specimens of Cnemidocarpa amphora were collected monthly from the Arabian Gulf from September 2017 to August 2018. Parts of their gonads were prepared for histological testing. The gonads’ diameters varied by month.
N. A. AlQurashi, G. Ibrahim
doaj +1 more source
The utility of hierarchical logistic regression for predicting repeated measures binary responses [PDF]
, 2016 This report will employ a hierarchical logistic regression model with mixed effects as an alternative to the traditional analysis of variance (ANOVA) approach that is often used when repeated observations are taken for each treatment.
Ghossainy, Maliki Eyvonne
core +1 more source
Frontiers in Oncology, 2022 PurposeIntravoxel incoherent motion (IVIM) is a promising technique that can acquire perfusion information without the use of contrast agent, contrary to the more established dynamic contrast-enhanced (DCE) technique.
Ernst S. Kooreman +5 more
doaj +1 more source
How many participants do we have to include in properly powered experiments? A tutorial of power analysis with reference tables [PDF]
, 2019 Given that an effect size of d = .4 is a good first estimate of the smallest effect size of interest in psychological research, we already need over 50 participants for a simple comparison of two within-participants conditions if we want to run a study ...
Brysbaert, Marc
core +2 more sources
Impact of foot progression angle modification on plantar loading in individuals with diabetes mellitus and peripheral neuropathy [PDF]
, 2016 AIMS: To determine if participants can reduce foot progression angle (FPA), and if FPA reduction decreases regional plantar stresses and forces in individuals with diabetes.
Bohnert, Kathryn L +5 more
core +6 more sources
Cramér-Von Mises Statistic for Repeated Measures
Revista Colombiana de Estadística, 2014 The Cramér-von Mises criterion is employed to compare whether the marginal distribution functions of a k-dimensional random variable are equal or not. The well-known Donsker invariance principle and the Karhunen-Loéve expansion is used in order to derive
PABLO MARTÍNEZ-CAMBLOR +2 more
doaj +1 more source
Imputation for Repeated Bounded Outcome Data: Statistical and Machine-Learning Approaches
Mathematics, 2021 Real-life data are bounded and heavy-tailed variables. Zero-one-inflated beta (ZOIB) regression is used for modelling them. There are no appropriate methods to address the problem of missing data in repeated bounded outcomes.
Urko Aguirre-Larracoechea +1 more
doaj +1 more source
Acta Scientiarum: Animal Sciences, 2017 Selection of superior forage genotypes is based on agronomic traits assayed in repeated measures. The questions are how repeatable the performance of individual genotypes is and how many harvests are needed to select the best genotypes.
Francisco Duarte Fernandes +7 more
doaj +1 more source
Generalized Mixed Models - an application to longitudinal data of citrus canker
Acta Scientiarum: Technology, 2019 There are several techniques available for longitudinal data analysis. In the last decade, much emphasis has been placed on generalized mixed models. The present work is dedicated to give an overview of this technique, with emphasis on the formulation ...
João Pedro Serenini +3 more
doaj +1 more source