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pro vyhledávání: '"Philip M. Westgate"'
Autor:
Whitney P. Ford, Philip M. Westgate
Publikováno v:
Statistics in Medicine. 39:2779-2792
Stepped wedge cluster trials are an increasingly popular alternative to traditional parallel cluster randomized trials. Such trials often utilize a small number of clusters and numerous time intervals, and these components must be considered when cho
BackgroundThe stepped wedge cluster randomized trial (SW-CRT) design is now preferred for many health- related trials because of its flexibility on resource allocation and clinical ethics concerns. However, as a necessary extension of studying multip
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb9a167c62435479aba9d91ad266f01c
https://doi.org/10.21203/rs.3.rs-993153/v1
https://doi.org/10.21203/rs.3.rs-993153/v1
Autor:
Philip M. Westgate
Publikováno v:
Communications in Statistics - Simulation and Computation. 49:305-316
Generalized estimating equations (GEE) incorporate a working correlation structure that is important because the more accurately this structure reflects the true structure, the more efficiently reg...
Autor:
Philip M. Westgate, Whitney P. Ford
Publikováno v:
Statistics in Medicine. 37:4318-4329
Data arising from longitudinal studies are commonly analyzed with generalized estimating equations. Previous literature has shown that liberal inference may result from the use of the empirical sandwich covariance matrix estimator when the number of
Autor:
Brady T. West, Philip M. Westgate
Publikováno v:
J Surv Stat Methodol
Weighted generalized estimating equations (GEEs) are popular for the marginal analysis of longitudinal survey data. This popularity is due to the ability of these estimating equations to provide consistent regression parameter estimates and correspon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb8eba22534e3fed987f07f3b441dc3a
https://europepmc.org/articles/PMC10072866/
https://europepmc.org/articles/PMC10072866/
Autor:
Whitney P. Ford, Philip M. Westgate
Publikováno v:
Biometrical Journal. 59:478-495
Cluster randomized trials (CRTs) are studies in which clusters of subjects are randomized to different trial arms. Due to the nature of outcomes within the same cluster to be correlated, generalized estimating equations (GEE) are growing as a popular
Publikováno v:
Statistics in Medicine. 36:958-970
The analysis of very small samples of Gaussian repeated measurements can be challenging. First, due to a very small number of independent subjects contributing outcomes over time, statistical power can be quite small. Second, nuisance covariance para
Autor:
I-Chen Chen, Philip M. Westgate
Publikováno v:
Int J Biostat
When observations are correlated, modeling the within-subject correlation structure using quantile regression for longitudinal data can be difficult unless a working independence structure is utilized. Although this approach ensures consistent estima
Publikováno v:
The American statistician. 71(4)
Correlated data are commonly analyzed using models constructed using population-averaged generalized estimating equations (GEEs). The specification of a population-averaged GEE model includes selection of a structure describing the correlation of rep
Autor:
Philip M. Westgate
Publikováno v:
Clinical trials (London, England). 16(1)
Background/aims Cluster randomized trials are popular in health-related research due to the need or desire to randomize clusters of subjects to different trial arms as opposed to randomizing each subject individually. As outcomes from subjects within