Results 61 to 70 of about 852,757 (260)

Generalized fractional differential equations for past dynamic

AIMS Mathematics, 2022
Well-posedness of the terminal value problem for nonlinear systems of generalized fractional differential equations is studied. The generalized fractional operator is formulated with a classical operator and a related weighted space.
Dumitru Baleanu, Babak Shiri
doaj   +1 more source

Analysing cluster randomised controlled trials using GLMM, GEE1, GEE2, and QIF: results from four case studies

BMC Medical Research Methodology, 2023
Background Using four case studies, we aim to provide practical guidance and recommendations for the analysis of cluster randomised controlled trials. Methods Four modelling approaches (Generalized Linear Mixed Models with parameters estimated by maximum
Bright C. Offorha, Stephen J. Walters, Richard M. Jacques   +2 more
doaj   +1 more source

Semiparametric Multivariate Accelerated Failure Time Model with Generalized Estimating Equations

, 2012
The semiparametric accelerated failure time model is not as widely used as the Cox relative risk model mainly due to computational difficulties. Recent developments in least squares estimation and induced smoothing estimating equations provide promising ...
A Komárek, A Qu, AA Tsiatis, BM Brown, BM Brown, CF Spiekerman, D Zeng, DR Cox, EA Gehan, EW Lee, H Li, J Buckley, J Yan, JM Robins, Jun Yan, Junghi Kim, K-Y Liang, K-Y Liang, L Yu, L Yu, LM Johnson, M Zhou, M-C Wang, P Novák, RL Prentice, RL Strawderman, Sangwook Kang, Sy Han Chiou, TL Lai, U Halekoh, W Stute, W Stute, WJ Huster, X Luo, Y Huang, Y Ritov, Y-G Wang, Z Jin, Z Jin, Z Jin, Z Ying   +40 more
core   +1 more source

The estimation of body density in men: are general equations general?

Annals of Human Biology, 1985
Regression equations for estimating body density and fatness from anthropometric measurements are usually specific to the populations from which they are derived, owing to methodological and biological factors. Some equations are, however, regarded as having general validity for subjects of different ages, levels of fatness and fitness.
Anna Ferro-Luzzi, N.G. Norgan
openaire   +3 more sources

Full title: prevalence and risk factors of overweight in Beijing infants basing generalized estimating equation: a longitudinal study

BMC Public Health
Background The prevalence of childhood overweight and obesity in China has been rapidly increasing in recent years. The purposes of this study were to investigate the prevalence of infant overweight in Beijing and to explore the influencing factors using
Fang Ye, Jie Chen, Qin Hui, Die Liu, Qi Sun, Jing Liu, Qi Zhang   +6 more
doaj   +1 more source

Bootstrap Confidence Intervals For Local Likelihood, Local Estimating Equations And Varying Coefficient Models [PDF]

, 2000
Four powerful generalizations of the usual local polynomial nonparametric regression methodology are (a) local polynomial methods in generalized linear models; (b) varying coefficient generalized linear models, where the possibly multivariate ...
Carroll, R. J., Galindo, C. D., Kauermann, Göran, Liang, H.   +3 more
core   +3 more sources

Influence of iodine intake on thyroid volume among students aged 8–10 years in a district of Beijing from 2022 to 2024 based on a generalized estimating equation model

Zhongguo gonggong weisheng
ObjectiveTo assess iodine intake levels and their impact on thyroid volume in children aged 8–10 years in a district of Beijing city from 2022 to 2024.
Zhilin WU, Yubin ZHANG, Chao HE, Wenzeng ZHANG   +3 more
doaj   +1 more source

Prevalence of diabetes and prediabetes among working-age adults and influencing factors of new-onset diabetes: a five-year cohort study (2018–2023)

Frontiers in Endocrinology
BackgroundDiabetes and prediabetes in the young and middle-aged population represent a significant public health challenge in China. In recent years, the prevalence of diabetes has gradually increased within this group.
Jing Tan, Mingzhu Chen, Yang Lei, Xiaofen Shi, Cuiping Cao, Naili Du, Yuyou Yao, Xiaojuan Yao   +7 more
doaj   +1 more source

Estimating Equations for Density Dependent Markov Jump Processes

Mathematics, 2021
Reaction networks are important tools for modeling a variety of biological phenomena across a wide range of scales, for example as models of gene regulation within a cell or infectious disease outbreaks in a population. Hence, calibrating these models to
Oluseyi Odubote, Daniel F. Linder
doaj   +1 more source

Efficiency evaluation of quadratic inference functions in the analysis of longitudinal medical data

Russian Open Medical Journal, 2018
Background ― In medical research, longitudinal studies have important and functional roles. Generalized estimating equation (GEE) is used for the analysis of longitudinal and correlated data required to determine the correlation structure among responses.
Jamshid Yazdani-Charati, Maryam Tatari, Hamed Rouhanizade   +2 more
doaj   +1 more source