This document provides an overview of generalized linear mixed models (GLMMs) for medical research:
- GLMMs combine generalized linear models, which handle non-normal data distributions using link functions, and linear mixed models, which incorporate random effects.
- When reporting GLMM analyses, it is important to adequately describe the statistical methods, research design, causal inference approach, model validation, and software/functions used. Previous reviews found much room for improvement in GLMM reporting quality.
- Guidelines for standardized GLMM reporting in medical journals could help ensure the validity of conclusions by documenting the analysis methods generating the results.
NagoyaStat #1 で用いた発表資料になります。主な内容は統計モデリングの考え方と、ポアソン分布に従うデータに対して最尤推定法を適用する方法です。
This slide is used at NagoyaStat #1 on August 6, 2016. Main contents are way of thinking of statistical modeling and applying Maximum Likelihood Estimation to data following poisson distribution.
The document discusses linear mixed models for analyzing repeated measures and between-subjects data. It explains that linear mixed models allow effects to vary randomly across clusters like subjects. Random effects account for variability between clusters while fixed effects represent average effects. The document provides examples of building linear mixed models in SPSS and Jamovi to analyze repeated measures and between-within subjects designs, including interpreting output and follow-up analyses like simple effects tests.
Final generalized linear modeling by idrees waris iugcId'rees Waris
This document discusses generalized linear models (GLM). It begins by introducing the topic and outlines the main points to be covered, including the history of GLM, assumptions for using GLM, and how to run GLM in SPSS. The document then covers the components of GLM, including the random, systematic, and link components. It discusses various distributions and link functions that can be used in GLM. The document concludes by providing an example of how to analyze shipping damage incident data using Poisson GLM in SPSS.
Application of Semiparametric Non-Linear Model on Panel Data with Very Small ...IOSRJM
-This research work investigated the behaviour of a new semiparametric non-linear (SPNL) model on
a set of panel data with very small time point (T = 1). The SPNL model incorporates the relationship between
individual independent variable and unobserved heterogeneity variable. Five different estimation techniques
namely; Least Square (LS), Generalized Method of Moments (GMM), Continuously Updating (CU), Empirical
Likelihood (EL) and Exponential Tilting (ET) Estimators were employed for the estimation; for the purpose of
modelling the metrical response variable non-linearly on a set of independent variables. The performances of
these estimators on the SPNL model were examined for different parameters in the model using the Least
Square Error (LSE), Mean Absolute Error (MAE) and Median Absolute Error (MedAE) criteria at the lowest
time point (T = 1). The results showed that the ET estimator which provided the least errors of estimation is
relatively more efficient for the proposed model than any of the other estimators considered. It is therefore
recommended that the ET estimator should be employed to estimate the SPNL model for panel data with very
small time point.
General Linear Model is an ANOVA procedure in which the calculations are performed using the least square regression approach to describe the statistical relationship between one or more prediction in continuous response variable. Predictors can be factors and covariates. Copy the link given below and paste it in new browser window to get more information on General Linear Model:- http://www.transtutors.com/homework-help/statistics/general-linear-model.aspx
Version 8 of SigmaXL statistical software includes several new features that make multiple comparisons easier. It adds Analysis of Means charts for comparing normal, binomial, and Poisson distributions in one-way and two-way settings. It also improves multiple comparisons procedures for one-way ANOVA, adds tests for equal variances, improves chi-square tests and associations, and includes new descriptive statistics, templates, and calculators.
In this paper we focus on mixed model analysis for regression model to take account of over dispersion in random effects. Moreover, we present the Data Exploration, Box plot, QQ plot, Analysis of variance, linear models, linear mixed –effects model for testing the over dispersion parameter in the mixed model. A mixed model is similar in many ways to a linear model. It estimates the effects of one or more explanatory variables on a response variable. In this article, the mixed model analysis was analyzed with the R-Language. The output of a mixed model will give you a list of explanatory values, estimates and confidence intervals of their effect sizes, P-values for each effect, and at least one measure of how well the model fits. The application of the model was tested using open-source dataset such as using numerical illustration and real datasets
1. Multinomial logistic regression allows modeling of nominal outcome variables with more than two categories by calculating multiple logistic regression equations to compare each category's probability to a reference category.
2. The document provides an example of using multinomial logistic regression to model student program choice (academic, general, vocational) based on writing score and socioeconomic status.
3. The model results show that writing score significantly impacts the choice between academic and general/vocational programs, while socioeconomic status also influences general versus academic program choice.
This document discusses biostatistics in bioequivalence studies. It covers:
1) The importance of biostatistics in designing and analyzing bioequivalence trials, as well as distinguishing between correlation and causation.
2) Key biostatistical concepts for bioequivalence studies including descriptive statistics, parametric assumptions of normality and homoscedasticity, study designs, and tests of significance.
3) Details on sample size calculation and determining the number of subjects needed in a bioequivalence study based on factors like variability, equivalence bounds, type I and II error rates.
9. the efficiency of volatility financial model withikhwanecdc
This document summarizes a study that investigates the effectiveness of volatility financial models with the presence of additive outliers via Monte Carlo simulation. The study simulates data using an ARMA(1,0)-GARCH(1,2) model with different sample sizes of 500, 1000, and 1400, both with and without 10% additive outliers added. The effectiveness of the models is evaluated based on error metrics and information criteria. The results indicate that the effectiveness of the ARMA-GARCH model diminishes as sample size increases in the presence of additive outliers.
This document provides an overview of data analysis techniques including analysis of variance (ANOVA), regression, correlation, and multivariate statistical analysis. It discusses understanding and interpreting ANOVA, regression, correlation matrices, and exploring factor analysis, multiple discriminant analysis, and cluster analysis. The document also provides examples of interpreting statistical output from ANOVA, regression, and correlation analysis.
The document describes a Stata package of programs for estimating panel vector autoregression (VAR) models. The package allows for convenient estimation, model selection, inference and other analyses of panel VAR models using generalized method of moments in a Stata environment. The programs address panel VAR specification, estimation, model selection criteria, impulse response analyses, and forecast error variance decomposition. The syntax and outputs of the commands are designed to be similar to Stata's built-in VAR commands for time series data.
Granger Causality Test: A Useful Descriptive Tool for Time Series DataIJMER
Interdependency of one or more variables on the other has been in the existence over long
time when it was discovered that one variable has to move or regress toward another following the
work done by Galton (1886); Pearson & Lee (1903); Kendall & Stuart, (1961); Johnston and
DiNardo, (1997); Gujarati, (2004) etc. It was in the light of this dependency over time the researcher
uses Granger Causality as an effective tool in time series Predictive causality using Nigeria GDP and
Money Supply to know the type of causality in existence in the two time series variables under
consideration and which one can statistically predicts the other.
The research work aimed at testing for nature of causality between GDP and money supply for
Federal Republic of Nigeria for the period of thirty years using the data sourced from Central Bank
of Nigeria Statistical Bulletin. After observing the various conditions of Granger causality test such
as ensuring stationarity in the variables under consideration; adding enough number of lags in the
prescribed model before estimation as Granger causality test is sensitive to the number of lags
introduced in the model; and as well as assuming the disturbance terms in the various models are
uncorrelated, the result of the analysis indicates a bilateral relationship between Nigeria GDP and
Money Supply. It implies Nigeria GDP Granger causes money Supply and vice versa. Based on the
result of this study, both Nigeria GDP and money Supply can be successfully model using Vector
Autoregressive Model since changes in one variable has a significant effect on the other variable.
This document provides an overview of generalized linear models (GLIMs) and their components. GLIMs extend linear regression to non-normally distributed dependent variables through the use of link functions and alternative error distributions. They allow modeling of variables on different scales, such as binary, categorical, count and continuous data. Key aspects of GLIMs include the systematic component relating predictors to the response, the error distribution, and the link function which transforms the response for a linear regression formulation. Common link functions and error distributions for different types of responses are discussed.
This document summarizes the analysis of data from a pharmaceutical company to model and predict the output variable (titer) from input variables in a biochemical drug production process. Several statistical models were evaluated including linear regression, random forest, and MARS. The analysis involved developing blackbox models using only controlled input variables, snapshot models using all input variables at each time point, and history models incorporating changes in input variables over time to predict titer values. Model performance was compared using cross-validation.
Goodness–of–fit tests for regression models: the functional data caseNeuroMat
In this talk the topic of the goodness–of–fit for regression models with functional covariates is considered. Although several papers have been published in the last two decades for the checking of regression models, the case where the covariates are functional is quite recent and has became of interest in the last years. We will review the very recent advances in this area and we will propose a new goodness–of–fit test for the null hypothesis of a functional linear model with scalar response. Our test is based on a generalization to the functional framework of a previous one, designed for the goodness–of–fit of regression models with multivariate covariates using random projections. The test statistic is easy to compute using geometrical and matrix arguments, and simple to calibrate in its distribution by a wild bootstrap on the residuals. Some theoretical aspects are derived and the finite sample properties of the test are illustrated by a simulation study. Finally, the test is applied to real data for checking the assumption of the functional linear model and a graphical tool is introduced. Lecturer: Wenceslao González-Manteiga, Univ. de Santiago de Compostela, Spain.
Generalized linear models (GLMs) are a type of statistical model that extend traditional linear models by allowing for non-normal error distributions and non-linear relationships between predictors and the response variable. GLMs relax assumptions of linear regression such as normality and constant variance. They have three main components: the systematic component that models the mean of the response as a linear combination of predictors, the link function that relates the linear predictor to the mean, and the random component that specifies the response distribution. Common GLMs include logistic regression, Poisson regression, and linear regression. GLMs are widely applicable and offer more flexibility compared to traditional linear models.
This short note describes a relatively simple methodology, procedure or approach to increase the performance of already installed industrial models used for optimization, control, simulation and/or monitoring purposes. The method is called Excess or X-Model Regression (XMR) where the concept of “excess modeling” or an X-model is taken from the field of thermodynamics to describe the departure or residual behaviour of real (non-ideal) gases and liquids from their ideal state (Kyle, 1999; Poling et. al., 2001; Smith et. al., 2001). It has also been applied to model the non-ideal or nonlinear behaviour of blending motor gasoline octanes with its synergistic and antagonistic interactional effects (Muller, 1992).
The fundamental idea of XMR is to calibrate, train, fit or estimate, using actual data and multiple linear regression (MLR) or ordinary least squares (OLS), the deviations of the measured responses from the existing model responses. The existing model may be a glass, grey or black-box model (known or unknown, linear or nonlinear, implicit/open or explicit/closed) depending on the use of the model. That is, for optimization and control the model structure and parameters are available given that derivative information is required although for simulation and monitoring, the model may only be observed through the dependent output variables given the necessary independent input variables.
1. The document discusses Granger causality testing within the context of bivariate analysis of stationary time series.
2. It defines Granger causality as when one time series can better predict another by including information from its own past, and describes three main tests for Granger causality between two stationary time series: the direct Granger test, Sims test, and modified Sims test.
3. The direct Granger test involves regressing each variable on lagged values of itself and the other variable, and using an F-test to examine if including lags of the other variable improves predictions compared to only using own lags.
Similar to GLMM in interventional study at Require 23, 20151219 (20)
Gene therapy can be broadly defined as the transfer of genetic material to cure a disease or at least to improve the clinical status of a patient.
One of the basic concepts of gene therapy is to transform viruses into genetic shuttles, which will deliver the gene of interest into the target cells.
Safe methods have been devised to do this, using several viral and non-viral vectors.
In the future, this technique may allow doctors to treat a disorder by inserting a gene into a patient's cells instead of using drugs or surgery.
The biggest hurdle faced by medical research in gene therapy is the availability of effective gene-carrying vectors that meet all of the following criteria:
Protection of transgene or genetic cargo from degradative action of systemic and endonucleases,
Delivery of genetic material to the target site, i.e., either cell cytoplasm or nucleus,
Low potential of triggering unwanted immune responses or genotoxicity,
Economical and feasible availability for patients .
Viruses are naturally evolved vehicles that efficiently transfer their genes into host cells.
Choice of viral vector is dependent on gene transfer efficiency, capacity to carry foreign genes, toxicity, stability, immune responses towards viral antigens and potential viral recombination.
There are a wide variety of vectors used to deliver DNA or oligo nucleotides into mammalian cells, either in vitro or in vivo.
The most common vector system based on retroviruses, adenoviruses, herpes simplex viruses, adeno associated viruses.
Breast cancer: Post menopausal endocrine therapyDr. Sumit KUMAR
Breast cancer in postmenopausal women with hormone receptor-positive (HR+) status is a common and complex condition that necessitates a multifaceted approach to management. HR+ breast cancer means that the cancer cells grow in response to hormones such as estrogen and progesterone. This subtype is prevalent among postmenopausal women and typically exhibits a more indolent course compared to other forms of breast cancer, which allows for a variety of treatment options.
Diagnosis and Staging
The diagnosis of HR+ breast cancer begins with clinical evaluation, imaging, and biopsy. Imaging modalities such as mammography, ultrasound, and MRI help in assessing the extent of the disease. Histopathological examination and immunohistochemical staining of the biopsy sample confirm the diagnosis and hormone receptor status by identifying the presence of estrogen receptors (ER) and progesterone receptors (PR) on the tumor cells.
Staging involves determining the size of the tumor (T), the involvement of regional lymph nodes (N), and the presence of distant metastasis (M). The American Joint Committee on Cancer (AJCC) staging system is commonly used. Accurate staging is critical as it guides treatment decisions.
Treatment Options
Endocrine Therapy
Endocrine therapy is the cornerstone of treatment for HR+ breast cancer in postmenopausal women. The primary goal is to reduce the levels of estrogen or block its effects on cancer cells. Commonly used agents include:
Selective Estrogen Receptor Modulators (SERMs): Tamoxifen is a SERM that binds to estrogen receptors, blocking estrogen from stimulating breast cancer cells. It is effective but may have side effects such as increased risk of endometrial cancer and thromboembolic events.
Aromatase Inhibitors (AIs): These drugs, including anastrozole, letrozole, and exemestane, lower estrogen levels by inhibiting the aromatase enzyme, which converts androgens to estrogen in peripheral tissues. AIs are generally preferred in postmenopausal women due to their efficacy and safety profile compared to tamoxifen.
Selective Estrogen Receptor Downregulators (SERDs): Fulvestrant is a SERD that degrades estrogen receptors and is used in cases where resistance to other endocrine therapies develops.
Combination Therapies
Combining endocrine therapy with other treatments enhances efficacy. Examples include:
Endocrine Therapy with CDK4/6 Inhibitors: Palbociclib, ribociclib, and abemaciclib are CDK4/6 inhibitors that, when combined with endocrine therapy, significantly improve progression-free survival in advanced HR+ breast cancer.
Endocrine Therapy with mTOR Inhibitors: Everolimus, an mTOR inhibitor, can be added to endocrine therapy for patients who have developed resistance to aromatase inhibitors.
Chemotherapy
Chemotherapy is generally reserved for patients with high-risk features, such as large tumor size, high-grade histology, or extensive lymph node involvement. Regimens often include anthracyclines and taxanes.
Nano-gold for Cancer Therapy chemistry investigatory projectSIVAVINAYAKPK
chemistry investigatory project
The development of nanogold-based cancer therapy could revolutionize oncology by providing a more targeted, less invasive treatment option. This project contributes to the growing body of research aimed at harnessing nanotechnology for medical applications, paving the way for future clinical trials and potential commercial applications.
Cancer remains one of the leading causes of death worldwide, prompting the need for innovative treatment methods. Nanotechnology offers promising new approaches, including the use of gold nanoparticles (nanogold) for targeted cancer therapy. Nanogold particles possess unique physical and chemical properties that make them suitable for drug delivery, imaging, and photothermal therapy.
Discover the benefits of homeopathic medicine for irregular periods with our guide on 5 common remedies. Learn how these natural treatments can help regulate menstrual cycles and improve overall menstrual health.
Visit Us: https://drdeepikashomeopathy.com/service/irregular-periods-treatment/
Travel Clinic Cardiff: Health Advice for International TravelersNX Healthcare
Travel Clinic Cardiff offers comprehensive travel health services, including vaccinations, travel advice, and preventive care for international travelers. Our expert team ensures you are well-prepared and protected for your journey, providing personalized consultations tailored to your destination. Conveniently located in Cardiff, we help you travel with confidence and peace of mind. Visit us: www.nxhealthcare.co.uk
Osvaldo Bernardo Muchanga-GASTROINTESTINAL INFECTIONS AND GASTRITIS-2024.pdfOsvaldo Bernardo Muchanga
GASTROINTESTINAL INFECTIONS AND GASTRITIS
Osvaldo Bernardo Muchanga
Gastrointestinal Infections
GASTROINTESTINAL INFECTIONS result from the ingestion of pathogens that cause infections at the level of this tract, generally being transmitted by food, water and hands contaminated by microorganisms such as E. coli, Salmonella, Shigella, Vibrio cholerae, Campylobacter, Staphylococcus, Rotavirus among others that are generally contained in feces, thus configuring a FECAL-ORAL type of transmission.
Among the factors that lead to the occurrence of gastrointestinal infections are the hygienic and sanitary deficiencies that characterize our markets and other places where raw or cooked food is sold, poor environmental sanitation in communities, deficiencies in water treatment (or in the process of its plumbing), risky hygienic-sanitary habits (not washing hands after major and/or minor needs), among others.
These are generally consequences (signs and symptoms) resulting from gastrointestinal infections: diarrhea, vomiting, fever and malaise, among others.
The treatment consists of replacing lost liquids and electrolytes (drinking drinking water and other recommended liquids, including consumption of juicy fruits such as papayas, apples, pears, among others that contain water in their composition).
To prevent this, it is necessary to promote health education, improve the hygienic-sanitary conditions of markets and communities in general as a way of promoting, preserving and prolonging PUBLIC HEALTH.
Gastritis and Gastric Health
Gastric Health is one of the most relevant concerns in human health, with gastrointestinal infections being among the main illnesses that affect humans.
Among gastric problems, we have GASTRITIS AND GASTRIC ULCERS as the main public health problems. Gastritis and gastric ulcers normally result from inflammation and corrosion of the walls of the stomach (gastric mucosa) and are generally associated (caused) by the bacterium Helicobacter pylor, which, according to the literature, this bacterium settles on these walls (of the stomach) and starts to release urease that ends up altering the normal pH of the stomach (acid), which leads to inflammation and corrosion of the mucous membranes and consequent gastritis or ulcers, respectively.
In addition to bacterial infections, gastritis and gastric ulcers are associated with several factors, with emphasis on prolonged fasting, chemical substances including drugs, alcohol, foods with strong seasonings including chilli, which ends up causing inflammation of the stomach walls and/or corrosion. of the same, resulting in the appearance of wounds and consequent gastritis or ulcers, respectively.
Among patients with gastritis and/or ulcers, one of the dilemmas is associated with the foods to consume in order to minimize the sensation of pain and discomfort.
- Video recording of this lecture in English language: https://youtu.be/Pt1nA32sdHQ
- Video recording of this lecture in Arabic language: https://youtu.be/uFdc9F0rlP0
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
The Children are very vulnerable to get affected with respiratory disease.
In our country, the respiratory Disease conditions are consider as major cause for mortality and Morbidity in Child.
5. 2015/12/19 REQUIRE23 Generalized Linear Mixed Model 7
Progress in Statistical Modeling
Linear Model
LM
Linear Model
LM
Generalized Linear Model
GLM
Generalized Linear Mixed
Model
GLMM
Hierarchical Bayes Model
HBM
according to Kubo (2012)
8. ⼀般線形モデル (General Linear Model)
t検定
ANOVA/ANCOVA
単/重回帰分析
GLMの特殊な形
正規性、等分散性、線形性、独⽴性
LMMの特殊な形
混合効果を含まない
推定:最尤推定 (実質的には最⼩⼆乗推定)
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 10
Linear Models (LM)
9. For simple analyses where the response variables are normal, all
treatments have equal sample sizes (i.e. the design is balanced)
and all random effects are nested effects, classical ANOVA
methods based on computing differences of sums of squares
give the same answers as ML approaches.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 11
Linear Models (LM)
Bolker et al. Trends Ecol Evol 2008. doi:10.116/j.tree.2008.10.008
15. ⼀般化線形混合モデル (GLMM)
混合効果を含むGLM
⾮正規分布に拡張したLMM
別名
階層的⼀般化線形モデル (HGLM)
マルチレベル⼀般化線形モデル (MGLM)
推定:いろいろ
最尤推定
マルコフ連鎖モンテカルロ法 (MCMC)
etc...
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 17
Generalized Linear Mixed Model
16. ⼀般化線形混合モデル (GLMM)
混合効果を含むGLM
⾮正規分布に拡張したLMM
Generalized linear mixed models (GLMMs) combine the
properties of two statistical frameworks that are widely used in
EE, linear mixed model (which incorporate random effects) and
generalized linear models (which handle nonnormal data by
using link functions and exponential family [e.g. normal, Poisson
or binomial] distributions)
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Generalized Linear Mixed Model
Bolker et al. Trends Ecol Evol 2008. doi:10.116/j.tree.2008.10.008
17. 2015/12/19 REQUIRE23 Generalized Linear Mixed Model 19
Relationships in Statistical Modeling
LM
Linear Model
LM
Linear Model
GLM
Generalized Linear
Model
GLM
Generalized Linear
Model
LMM
Linear Mixed
Model
LMM
Linear Mixed
Model
GLMM
Generalized Linear
Mixed Model
GLMM
Generalized Linear
Mixed Model
⾮正規分布
⾮線形
混合効果
混合効果
⾮正規分布
⾮線形
最尤推定
最尤推定
ベイズ推定, etc
22. Casals M, Girabent-Farres M, Carrasco JL.
Methodological quality of reporting of
generalized linear mixed models in clinical
medicine (2000-2012): A systematic review.
PLoS ONE 2014; 9: e112653.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 24
GLMMの適正報告
26. Our review also indicated that there is room for
improvement in quality when basic characteristics
about the GLMMs are reported in medical journals.
It is important to adequately describe the
statistical methods used in the analysis.
the validity of the conclusion is linked to the adequacy
of the methods used to generate the results.
Standardized guidelines to report GLMM
characteristics in medicine could be beneficial, ......
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 28
Casals, et al. 2015の結論
31. Two-level and 3-level models utilized assessment occasions as
level 1 measurement units (ie, the baseline, postintervention,
and 3 follow-up assessment of unprotected vaginal and anal
intercourse), and participants as level 2 units. In the 3-level
models, the level 1 measurement units were assessment
occasions, which were nested within the level 2 units, study
participants, which, in turn, were nested within the level 3 units,
the 26 specific intervention groups (ie, the distinct coping or
support groups).
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 34
1. データの形式
J Acquir Immune Defic Syndr 2008; 47: 506-513.
32. The 3-level models were used to rule out differential group-level
effects (eg, therapist, group dynamics), which could confound
comparisons between study conditions. Because results did not
differ between 2- and 3-level models and there was no
significant group level effect, only 2-level models are reported.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 35
1. データの形式
J Acquir Immune Defic Syndr 2008; 47: 506-513.
33. To consult the models, we used the number of ADR reports as
the dependent variable, with individual observations (per month
per physician) as level 1, physicians as level 2, and spatial
clusters (as indicator variable) as level3; random-effects were
considered, both among physicians and among spatial
clusters.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 36
1. データの形式
JAMA 2006; 296: 1086-1093.
34. 切⽚モデル
Y = (β0+b0j) + β1*Group + β2*Time + β3*Group*Time + e
傾きモデル
Y = β0 + β1*Group + (β1+b0j)*Time + β3*Group*Time + e
切⽚ + 傾きモデル
Y = (β0+b0j) + β1*Group + (β1+b0j)*Time + β3*Group*Time + e
Ancovaモデル
Y = bj(Ancova) + β0 + β1*Group + β2*Time + β3*Group*Time + e
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 37
3. 解析デザイン
35. We derived those estimates specifying a random intercept-
random slope generalized linear mixed model (GLMM) with a
logit link function and binomial family.
Generalized linear mixed models with random intercepts were
used to estimate the overall independent effects of participation
in physical activity on quality of life and to estimate the
independent interindividual (differences between participants)
and intraindividual (within-participant changes) effects of
physical activity on quality of life.
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3. 解析デザイン
Am J Respir Crit Care Med 2013; 187: 439-445.
J Clin Oncol 2008; 26: 4480-4487.
36. ソフトウェア (90.7%) と⽐較して、関数・
マクロ (38.9%) は報告されない。
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 39
7. 解析環境
Bolker et al. Trends Ecol Evol 2008. doi:10.116/j.tree.2008.10.008
based on PLoS One 2014; 9: e112653.
37. To examine changes in the frequency of unprotected anal and
vaginal intercourse by intervention condition, generalized linear
mixed models (GLMMs) were employed, using the SAS macro
PROC GLIMMIX (SAS Institute, Inc., Cary, NC).
Analyses were performed using S-Plus 6.2 (Insightful Corp,
Seattle, Wash).
All data were double entered into a database and statistical
analyses were performed using Stata 12.1 (Stata Corp Lp,
College Station, TX) and R 2.15.0.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 40
7. 解析環境
J Acquir Immune Defic Syndr 2008; 47: 506-513.
JAMA 2006; 296: 1086-1093.
Am J Respir Crit Care Med 2013; 187: 439-445.
38. LMM
ML, FIML : Full Information Maximum Likelihood
REML : REstricted Maximum Likelihood
GLMM
PQL : Pseudo- and penalized QuasiLlikelihood
Laplace approximations
GHQ : Gauss-Hermite quadrature
MCMC : Markov chain Monte Carlo
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9. 推定⽅法
40. Generalized linear mixed model, using penalized quasilikelihood,
were applied to the statistical analysis.
We reported restricted maximum likelihood (REML) estimates, as
they provided better estimates of variance components.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 43
9. 推定⽅法
JAMA 2006; 296: 1086-1093.
Int J Cancer 2015; 137: 448-462.
41. 分布の種類
normal
Poisson
binomial
ゼロが重たい分布
zero-inflated model
hurdle model
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 44
10. 従属変数の分布
42. 2015/12/19 REQUIRE23 Generalized Linear Mixed Model 46
10. 従属変数の分布
Zero-inflated model
Am J Drug Alcohol Abuse 2011; 37: 367-375.
真のゼロと偽のゼロを
⼆項分布で識別
真のゼロと偽のゼロを
⼆項分布で識別
43. 2015/12/19 REQUIRE23 Generalized Linear Mixed Model 48
10. 従属変数の分布
Hurdle model
Am J Drug Alcohol Abuse 2011; 37: 367-375.
ゼロを超えたかどうかを
⼆項分布で識別
ゼロを超えたかどうかを
⼆項分布で識別
44. Because the dependent variable was a count outcome, a Poisson
generalized linear mixed model was used.
A mixed effects with (random effect for subject) logistic
regression model was used to compare the proportion of
positive responders for CFP-10 and ESAT-6, between the
treatment arms. The quantitative responses were zero inflated
and severely over dispersed. To allow this, a mixed effects
Tweedie (compound Poisson) model was fitted using the R
package cplm.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 49
10. 従属変数の分布
Am J Repir Crit Care Med 2013; 187: 439-445.
JAMA 2006; 296: 1086-1093.
46. The quantitative responses were zero inflated and severely over
dispersed. To allow this, a mixed effects Tweedie (compound
Poisson) model was fitted using the R package cplm.
Because the Poisson assumption (that the mean and variance of
the dependent variable are equal) was not met in our data, the
models were adjusted taking the overdispersion parameter into
account.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 51
11-13. 過分散の取り扱い
Am J Repir Crit Care Med 2013; 187: 439-445.
JAMA 2006; 296: 1086-1093.
47. 2015/12/19 REQUIRE23 Generalized Linear Mixed Model 52
介⼊研究でのGLMMの報告事項
報告事項
1. データの形式
3. 研究解析デザイン
7, 8. 解析に⽤いたソフトウェア, 関数, マクロ
9. 推定⽅法
10. 従属変数の分布
11-13. 過分散の取り扱い
based on PLoS One 2014; 9: e112653.
48. Four important characteristics to consider when specifying
analyses for longitudinal clinical trials include: (1) the
mechanism(s) giving rise to the missing data; (2) the
correlations between repeated measures on each patient; (3) the
time trends; and (4) the statistical distribution that best
describes the looklihood of various outcomes.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 53
Mallinckrodt CH.
Mallinckrodt CH. Preventing and Treating Missing Data in Longitudinal Clinical Trials. 2013.
50. 2015/12/19 REQUIRE23 Generalized Linear Mixed Model 58
ex. 従属変数の相関構造
Unstructured
Compound
Symmetry
Auto-
regressive
データ構造
N:⼤
測定回数:少
測定回数と⽐較して
Nが⼩さい
データの種類 - 客観指標 主観指標
相関の原因 -
患者固有の
要素
経時変化
Mallinckrodt CH. Preventing and Treating Missing Data in Longitudinal Clinical Trials. 2013.
51. Separate mixed-effects models were fit for each of those
outcomes, which were measured repeatedly at baseline, 6
months, and 12 months. Main effects of treatment group and
time, as well as the treatment group x time interaction effect
were examined in the mixed-effect models using the
unstructured dependence structure.
We used baseline scores as a dependent variable, the cluster was
represented by random effect, and the within patient covariance
structure was unstructured.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 59
ex. 従属変数の相関構造
JAMA 2010; 304: 1795-1802.
BMJ 2014; 349: g5392.
52. 事前に定める主解析は柔軟にしておく
相関構造の事前想定が⼤雑把だと収束しない
The final analysis of the trial will be carried out on an intention-
to-treat basis. The freedom of the clusters to fill in the precise
implementation of the intervention will probably relate to the
(cost)-effectiveness of the intervention and, therefore, the
clustering of patients in GP practices should be taken into
consideration in the analysis. Therefore, the results will be
investigated with respect to the differences in intensity between
and within clusters over time using multi-level analysis.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 60
ex. 従属変数の相関構造
BMC Pulm Med 2013; 13: 17, the protocol paper for BMJ 2014; 349: g5392.
Mallinckrodt CH. Preventing and Treating Missing Data in Longitudinal Clinical Trials. 2013.
54. 丹後俊郎. 継時的繰り返し測定デザイン. 東京; 朝倉書店: 2015.
190-209.
Tango T. On the repeated measures designs and sample sizes
for randomized controlled trial. Biostatistics 2015; pil: kxv. [e-
pub, ahead of print]
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 64
詳しくは以下を参照
55. 2015/12/19 REQUIRE23 Generalized Linear Mixed Model 65
1:Tモデル
0
5
10
15
20
25
30
pre 2m 3m 5m 8m
BDIScore
TAU BtheB
測定点T個測定点T個
ベースライン1つベースライン1つ
Psych Med 2003; 33: 217-227.
56. あ
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 66
S:Tデザイン
測定点T個測定点T個
ベースラインS個ベースラインS個
NEJM 1998; 338: 861-6.
59. Figuerias A, Herdeiro MT, Polonia J, Gestal-Otero JJ.
An educational intervention to improve physician
reporting of adverse drug reactions.
JAMA 2006; 296: 1086-193.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 78
S:Tモデルの解析
60. To consult the models, we used the number of ADR reports as
the dependent variable, with individual observations (per month
per physician) as level 1, physicians as level 2, ...... To measure
the intervention effect, a dichotomous indicator variable was
created. This variable (period) assumed a value of 0 for baseline
period and a value of 1 for months between the start of the
intervention and the end of the follow-up. The intervention
effect was evaluated on the basis of the interaction between the
group (1 for intervention group, 0 for control group) and period
variables.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 79
S:Tモデルの解析
JAMA 2006; 296: 1086-1093.
62. 安藤正⼈ 2011: マルチレベル分析⼊⾨
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 82
参考図書
63. 安藤正⼈ 2011: データ解析のための統計モ
デリング⼊⾨
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 83
参考図書
64. 丹後俊郎 2015: 経時的繰り返し測定デザイ
ン
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 84
参考図書
65. Fitzmaurice GM, Laird NM, Ware JH. Applied
Longitudinal Analysis (2nd ed).
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 85
参考図書
66. Mallinckrodt CH. Preventing and treating
missing data in longitudinal clinical trials.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 86
参考図書
67. Casals M, Girabent-Farres M, Carrasco JL. Methodological
quality and reporting of generalized linear mixed models in
clinical medicine (2000-2012): A Systematic Review. PLoS ONE
2014; 9: e112653.
Thiele J, Markussen B. Potential of GLMM in modelling invasive
spread. CAB rev 2012; 7: 1-10.
Bolker BM, Brooks ME, Clark CJ, et al. Generalized linear mixed
models: a practical guide for ecology and evolution. Trends
ecol evol 2008; 24: 127-135.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 87
解説論⽂
68. Tango T. On the repeated measures designs and sample sizes
for randomized controlled trials. Biostatistics 2015; kxv047: 1-6.
Hu MC, Pavlicova M. Nunes EV. Zero-inflated and hurdle
models of count data with extra zeros: examples from an HIV-
RISK reduction intervention trial. Am J Drug Alcohol Abuse
2011; 37: 367-375.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 88
解説論⽂ (統計的なこと)
69. Figueiras A, Herdeiro MT, Polonia J, et al. An educational
intervention to improve physician reporting of adverse drug
reaction. A cluster-randomized controlled trial. JAMA 2006;
296: 1086-1093.
Sikkema KJ, Wilson PA, Hansen NB, et al. Effects of a coping
intervention on transmission risk behavior among people
living with HIV/AIDS and a history of childhood sexual abuse. J
Acquir Immune Defic Syndr 2008; 47: 506-513.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 89
介⼊研究の報告
70. Adetifa IM, Ota MOC, Jeffries DJ, et al. Interferon-γ ELISPOT as
biomarker of treatment efficacy in latent tuberculosis infection.
A clinical trial. Am J Respir Crit Care Med 2013; 187: 439-445.
Kruis AL, Boland MRS, Assendelft WJJ, et al. Effectiveness of
integrated disease management for primary care chronic
obstructive pulmonary disease patients: results of cluster
randomized trial. BMJ 2014; 349: g5392.
Kruis AL, Boland MRS, Shoonvelde CH, et al. RECODE: Design
and baseline results of a cluster randomized trial on cost-
effectiveness of integrated COPD management in primary care.
BMC Plum Med 2013; 13: 17.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 90
介⼊研究の報告
71. Goodpaster BH, Delany JP, Otto AD. Effects of diet and physical
activity interventions on weight loss and cardiometabolic risk
factors in severely obese adults. JAMA 2010; 304: 1795-1802.
Lynch BM, Cerin E, Owen N, et al. Prospective relationships of
physical activity with quality of life among colorectal cancer
survivors. J Clin Oncol 2008; 26: 4480-4487.
Edefonti V, Hashibe M, Parpinel M, et al. Natural vitamin C
intake and the risk of head and neck cancer: A pooled analysis
in the International Head and Neck Cancer Epidemiology
Consortium. Int J Cancer 2015; 137: 448-462.
2015/12/19 REQUIRE23 Generalized Linear Mixed Model 91
介⼊研究の報告