Introduction to Meta-Analysis (eBook)

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2021 | 2. Auflage
544 Seiten
Wiley (Verlag)
978-1-119-55839-2 (ISBN)

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Introduction to Meta-Analysis -  Michael Borenstein,  Larry V. Hedges,  Julian P. T. Higgins,  Hannah R. Rothstein
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The new edition of the market-leading textbook, covering the latest developments in the rapidly growing field of meta-analysis 

This book provides a clear and thorough introduction to meta-analysis, the process of synthesizing data from a series of separate studies. The first edition of this text was widely acclaimed for the clarity of the presentation, and quickly established itself as the definitive text in this field.  The fully updated second edition includes new and expanded content on avoiding common mistakes in meta-analysis, understanding heterogeneity in effects, publication bias, reporting the Knapp-Hartung Sidik-Jonkman adjustment, and more. Several brand-new chapters provide a systematic 'how to' approach to performing and reporting a meta-analysis from start to finish.  

Written by four of the world's foremost authorities on all aspects of meta-analysis, the new edition of Introduction to Meta-Analysis: 

  • Outlines the role of meta-analysis in the research process 
  • Shows how to compute effects sizes and treatment effects 
  • Explains the fixed-effect and random-effects models for synthesizing data 
  • Demonstrates how to assess and interpret variation in effect size across studies 
  • Explains how to avoid common mistakes in meta-analysis 
  • Discusses controversies in meta-analysis 
  • Includes access to a companion website containing videos, spreadsheets, data files, free software for prediction intervals, and step-by-step instructions for performing analyses using Comprehensive Meta-Analysis (CMA) ? 


Michael Borenstein is the Director of Biostat, a leading developer of statistical software. He is the primary developer of Comprehensive Meta-Analysis (CMA), the world's most widely used program for meta-analysis.  He is the recipient of numerous grants from the NIH to develop methods, software, and educational materials for meta-analysis. He has lectured widely on meta-analysis, including at the NIH, CDC, and FDA. 

Larry V. Hedges is Board of Trustees Professor of Statistics and Education and Social Policy, Professor of Psychology, Professor of Medical Social Sciences, and IPR Fellow, Northwestern University, USA. He is a national leader in the fields of educational statistics and evaluation and is an elected member of many leading associations. 

Julian P.T. Higgins is Professor of Evidence Synthesis at the University of Bristol, UK, and a National Institute for Health Research (NIHR) Senior Investigator. He has had numerous core roles in the Cochrane Collaboration, including editing its methodological Handbook since 2003. His many contributions to meta-analysis include the foundation of network meta-analysis, methods for describing and explaining heterogeneity and a general framework for individual participant data meta-analysis. He is a Highly Cited Researcher with over a quarter of a million citations to his work and has been a recipient of the Ingram Olkin Award for distinguished lifetime achievement in research synthesis methodology. 

Hannah R. Rothstein is Professor of Management at Baruch College and the Graduate Center of the City University of New York. She is a Fellow of the American Psychological Association and a past President of the Society for Research Synthesis Methodology. She is former Editor-in-Chief of Research Synthesis Methods and serves on the editorial boards of Psychological Bulletin, Psychological Methods, and Organizational Research Methods. Professor Rothstein is a co-developer of the Comprehensive Meta-Analysis software and has published numerous systematic reviews and meta-analyses. 


A clear and thorough introduction to meta-analysis, the process of synthesizing data from a series of separate studies The first edition of this text was widely acclaimed for the clarity of the presentation, and quickly established itself as the definitive text in this field. The fully updated second edition includes new and expanded content on avoiding common mistakes in meta-analysis, understanding heterogeneity in effects, publication bias, and more. Several brand-new chapters provide a systematic "e;how to"e; approach to performing and reporting a meta-analysis from start to finish. Written by four of the world's foremost authorities on all aspects of meta-analysis, the new edition: Outlines the role of meta-analysis in the research process Shows how to compute effects sizes and treatment effects Explains the fixed-effect and random-effects models for synthesizing data Demonstrates how to assess and interpret variation in effect size across studies Explains how to avoid common mistakes in meta-analysis Discusses controversies in meta-analysis Includes access to a companion website containing videos, spreadsheets, data files, free software for prediction intervals, and step-by-step instructions for performing analyses using Comprehensive Meta-Analysis (CMA) Download videos, class materials, and worked examples at www.Introduction-to-Meta-Analysis.com "e;This book offers the reader a unified framework for thinking about meta-analysis, and then discusses all elements of the analysis within that framework. The authors address a series of common mistakes and explain how to avoid them. As the editor-in-chief of the American Psychologist and former editor of Psychological Bulletin, I can say without hesitation that the quality of manuscript submissions reporting meta-analyses would be vastly better if researchers read this book."e; Harris Cooper, Hugo L. Blomquist Distinguished Professor Emeritus of Psychology and Neuroscience, Editor-in-chief of the American Psychologist, former editor of Psychological Bulletin "e;A superb combination of lucid prose and informative graphics, the authors provide a refreshing departure from cookbook approaches with their clear explanations of the what and why of meta-analysis. The book is ideal as a course textbook or for self-study. My students raved about the clarity of the explanations and examples."e; David Rindskopf, Distinguished Professor of Educational Psychology, City University of New York, Graduate School and University Center, & Editor of the Journal of Educational and Behavioral Statistics "e;The approach taken by Introduction to Meta-analysis is intended to be primarily conceptual, and it is amazingly successful at achieving that goal. The reader can comfortably skip the formulas and still understand their application and underlying motivation. For the more statistically sophisticated reader, the relevant formulas and worked examples provide a superb practical guide to performing a meta-analysis. The book provides an eclectic mix of examples from education, social science, biomedical studies, and even ecology. For anyone considering leading a course in meta-analysis, or pursuing self-directed study, Introduction to Meta-analysis would be a clear first choice."e; Jesse A. Berlin, ScD

Michael Borenstein is the Director of Biostat, a leading developer of statistical software. He is the primary developer of Comprehensive Meta-Analysis (CMA), the world's most widely used program for meta-analysis. He is the recipient of numerous grants from the NIH to develop methods, software, and educational materials for meta-analysis. He has lectured widely on meta-analysis, including at the NIH, CDC, and FDA. Larry V. Hedges is Board of Trustees Professor of Statistics and Education and Social Policy, Professor of Psychology, Professor of Medical Social Sciences, and IPR Fellow, Northwestern University, USA. He is a national leader in the fields of educational statistics and evaluation and is an elected member of many leading associations. Julian P.T. Higgins is Professor of Evidence Synthesis at the University of Bristol, UK, and a National Institute for Health Research (NIHR) Senior Investigator. He has had numerous core roles in the Cochrane Collaboration, including editing its methodological Handbook since 2003. His many contributions to meta-analysis include the foundation of network meta-analysis, methods for describing and explaining heterogeneity and a general framework for individual participant data meta-analysis. He is a Highly Cited Researcher with over a quarter of a million citations to his work and has been a recipient of the Ingram Olkin Award for distinguished lifetime achievement in research synthesis methodology. Hannah R. Rothstein is Professor of Management at Baruch College and the Graduate Center of the City University of New York. She is a Fellow of the American Psychological Association and a past President of the Society for Research Synthesis Methodology. She is former Editor-in-Chief of Research Synthesis Methods and serves on the editorial boards of Psychological Bulletin, Psychological Methods, and Organizational Research Methods. Professor Rothstein is a co-developer of the Comprehensive Meta-Analysis software and has published numerous systematic reviews and meta-analyses.

List of Tables xv

List of Figures xix

Acknowledgements xxv

Preface xxvii

Preface to the Second Edition xxxv

Website xxxvii

Part 1: Introduction

1 How a Meta-Analysis Works 3

2 Why Perform a Meta-Analysis 9

Part 2: Effect Size and Precision

3 Overview 17

4 Effect Sizes Based On Means 21

5 Effect Sizes Based On Binary Data (2 × 2 Tables) 33

6 Effect Sizes Based On Correlations 39

7 Converting Among Effect Sizes 43

8 Factors That Affect Precision 49

9 Concluding Remarks 55

Part 3: Fixed-Effect Versus Random-Effects Models

10 Overview 59

11 Fixed-Effect Model 61

12 Random-Effects Model 65

13 Fixed-Effect Versus Random-Effects Models 71

14 Worked Examples (Part 1) 81

Part 4: Heterogeneity

15 Overview 97

16 Identifying and Quantifying Heterogeneity 99

17 Prediction Intervals 119

18 Worked Examples (Part 2) 127

19 An Intuitive Look At Heterogeneity 139

20 Classifying Heterogeneity As Low, Moderate, Or High 155

Part 5: Explaining Heterogeneity

21 Subgroup Analyses 161

22 Meta-Regression 197

23 Notes On Subgroup Analyses and Meta-Regression 213

Part 6: Putting It All In Context

24 Looking At the Whole Picture 223

25 Limitations of the Random-Effects Model 233

26 Knapp-Hartung Adjustment 243

Part 7: Complex Data Structures

27 Overview 253

28 Independent Subgroups Within a Study 255

29 Multiple Outcomes or Time-Points Within A Study 263

30 Multiple Comparisons Within a Study 277

31 Notes On Complex Data Structures 281

Part 8: Other Issues

32 Overview 287

33 Vote Counting - A New Name For An Old Problem 289

34 Power Analysis For Meta-Analysis 295

35 Publication Bias 313

Part 9: Issues Related To Effect Size

36 Overview 335

37 Effect Sizes Rather Than P-Values 337

38 Simpson's Paradox 343

39 Generality of the Basic Inverse-Variance Method 349

Part 10: Further Methods

40 Overview 361

41 Meta-Analysis Methods Based On Direction and P-Values 363

42 Further Methods For Dichotomous Data 369

43 Psychometric Meta-Analysis 377

Part 11: Meta-Analysis In Context

44 Overview 391

45 When Does It Make Sense To Perform a Meta-Analysis? 393

46 Reporting The Results of a Meta-Analysis 401

47 Cumulative Meta-Analysis 407

48 Criticisms of Meta-Analysis 413

49 Comprehensive Meta-Analysis Software 425

50 How To Explain the Results of An Analysis 443

Part 12: Resources

51 Software For Meta-Analysis 471

52 Web Sites, Societies, Journals, and Books 473

Web sites 473

Professional societies 476

Journals 476

Special issues dedicated to meta-analysis 477

Books on systematic review methods and meta-analysis 477

References 479

Index 491

List of Figures


  1. Figure 1.1 High-dose versus standard-dose of statins (adapted from Cannon et al., 2006)
  2. Figure 2.1 Impact of streptokinase on mortality (adapted from Lau et al., 1992)
  3. Figure 4.1 Response ratios are analyzed in log units
  4. Figure 5.1 Risk ratios are analyzed in log units
  5. Figure 5.2 Odds ratios are analyzed in log units
  6. Figure 6.1 Correlations are analyzed in Fisher’s z units
  7. Figure 7.1 Converting among effect sizes
  8. Figure 8.1 Impact of sample size on variance
  9. Figure 8.2 Impact of study design on variance
  10. Figure 10.1 Symbols for true and observed effects
  11. Figure 11.1 Fixed-effect model - true effects
  12. Figure 11.2 Fixed-effect model - true effects and sampling error
  13. Figure 11.3 Fixed-effect model - distribution of sampling error
  14. Figure 12.1 Random-effects model - distribution of the true effects
  15. Figure 12.2 Random-effects model - true effects
  16. Figure 12.3 Random-effects model - true and observed effect in one study
  17. Figure 12.4 Random-effects model - between-study and within-study variance
  18. Figure 13.1 Fixed-effect model - forest plot showing relative weights
  19. Figure 13.2 Random-effects model - forest plot showing relative weights
  20. Figure 13.3 Very large studies under fixed-effect model
  21. Figure 13.4 Very large studies under random-effects model
  22. Figure 14.1 Forest plot of Dataset 1 - fixed-effect weights
  23. Figure 14.2 Forest plot of Dataset 1 - random-effects weights
  24. Figure 14.3 Forest plot of Dataset 2 - fixed-effect weights
  25. Figure 14.4 Forest plot of Dataset 2 - random-effects weights
  26. Figure 14.5 Forest plot of Dataset 3 - fixed-effect weights
  27. Figure 14.6 Forest plot of Dataset 3 - random-effects weights
  28. Figure 16.1 Dispersion across studies relative to error within studies
  29. Figure 16.2 Q in relation to df as measure of dispersion
  30. Figure 16.3 Flowchart showing how T2 and I2 are derived from Q and df
  31. Figure 16.4 Impact of Q and number of studies on the p-value
  32. Figure 16.5 Impact of excess dispersion and absolute dispersion on T2
  33. Figure 16.6 Impact of excess and absolute dispersion on T
  34. Figure 16.7 Impact of excess dispersion on I2
  35. Figure 16.8 Factors affecting T2 but not I2
  36. Figure 16.9 Factors affecting I2 but not T2
  37. Figure 17.1 Prediction interval based on population parameters μ and τ2
  38. Figure 17.2 Prediction interval based on sample estimates M*and T2
  39. Figure 17.3 Simultaneous display of confidence interval and prediction interval
  40. Figure 17.4 Impact of number of studies on confidence interval and prediction interval
  41. Figure 18.1 Forest plot of Dataset 1 - random-effects weights with prediction interval
  42. Figure 18.2 Forest plot of Dataset 2 - random-effects weights with prediction interval
  43. Figure 18.3 Forest plot of Dataset 3 - random-effects weights with prediction interval
  44. Figure 19.1 Alcohol use and mortality. Risk ratio ≺ 1 favors drinkers. Three possible distributions of true effects
  45. Figure 19.2 Alcohol use and mortality. Risk ratio ≺ 1 favors drinkers. Three possible distributions of true effects (inner) and observed effects (outer)
  46. Figure 19.3 Alcohol use and mortality (Forest plot). Risk ratio ≺ 1 favors drinkers.
  47. Figure 19.4 Alcohol use and mortality (true effects). Risk ratio ≺ 1 favors drinkers.
  48. Figure 20.1 True effects for two meta-analyses
  49. Figure 20.2 True effects (inner) and observed effects (outer) for two meta-analyses
  50. Figure 21.1 Fixed-effect model - studies and subgroup effects
  51. Figure 21.2 Fixed-effect - subgroup effects
  52. Figure 21.3 Fixed-effect model - treating subgroups as studies
  53. Figure 21.4 Flowchart for selecting a computational model
  54. Figure 21.5 Random-effects model (separate estimates of τ2) - studies and subgroup effects
  55. Figure 21.6 Random-effects model (separate estimates of τ2) - subgroup effects
  56. Figure 21.7 Random-effects model (separate estimates of τ2) - treating subgroups as studies
  57. Figure 21.8 Random-effects model (pooled estimate of τ2) - studies and subgroup effects
  58. Figure 21.9 Random-effects model (pooled estimate of τ2) - subgroup effects
  59. Figure 21.10 Random-effects model (pooled estimate of τ2) - treating subgroups as studies
  60. Figure 21.11 A primary study showing subjects within groups
  61. Figure 21.12 Random-effects model - variance within and between subgroups
  62. Figure 21.13 Proportion of variance explained by subgroup membership
  63. Figure 22.1 Fixed-effect model - forest plot for the BCG data
  64. Figure 22.2 Fixed-effect model - regression of log risk ratio on latitude
  65. Figure 22.3 Fixed-effect model - population effects as function of covariate
  66. Figure 22.4 Random-effects model - population effects as a function of covariate
  67. Figure 22.5 Random-effects model - forest plot for the BCG data
  68. Figure 22.6 Random-effects model - regression of log risk ratio on latitude
  69. Figure 22.7 Between-studies variance (T2) with no covariate
  70. Figure 22.8 Between-studies variance (T2) with covariate
  71. Figure 22.9 Proportion of variance explained by latitude
  72. Figure 24.1 Three fictional examples where the mean effect is 0.00
  73. Figure 24.2 Three fictional examples where the mean effect is 0.40
  74. Figure 24.3 Three fictional examples where the mean effect is 0.80
  75. Figure 24.4 Methylphenidate for adults with ADHD (Forest plot). Effect size > 0 favors treatment
  76. Figure 24.5 Methylphenidate for adults with ADHD (True effects). Effect size > 0 favors treatment
  77. Figure 24.6 GLP-1 mimetics and diastolic BP (Forest plot). Mean difference ≺ 0 favors treatment
  78. Figure 24.7 GLP-1 mimetics and diastolic BP (True effects). Mean difference ≺ 0 favors treatment
  79. Figure 24.8 Augmenting clozapine (Forest plot). Std mean difference ≺ 0 favors augmentation
  80. Figure 24.9 Augmenting clozapine (True effects). Std mean difference ≺ 0 favors augmentation
  81. Figure 25.1 Random effects. Confidence interval 60 points wide
  82. Figure 25.2 Methylphenidate for adults with ADHD. Effect size > 0 favors treatment
  83. Figure 28.1 Creating a synthetic variable from independent subgroups
  84. Figure 33.1 The p-value for each study is > 0.20 but the p-value for the summary effect is ≺ 0.02
  85. Figure 34.1 Power for a primary study as a function of n and τ
  86. Figure 34.2 Power for a meta-analysis as a function of number studies and τ
  87. Figure 34.3 Power for a meta-analysis as a function of number studies and heterogeneity
  88. Figure 35.1 Passive smoking and lung cancer - forest plot
  89. Figure 35.2 Passive smoking and lung cancer - funnel plot
  90. Figure 35.3 Observed studies only
  91. Figure 35.4 Observed studies and studies imputed by Trim and Fill
  92. Figure 35.5 Passive smoking and lung cancer - cumulative forest plot
  93. Figure 37.1 Estimating the effect size versus testing the null hypothesis
  94. Figure 37.2 The p-value is a poor surrogate for effect size
  95. Figure 37.3 Studies where p-values differ but effect sizes is the same
  96. Figure 37.4 Studies where p-values are the same but effect sizes differ
  97. Figure 37.5 Studies where the more significant p-value corresponds to weaker effect size
  98. Figure 38.1 Circumcision and HIV. Odds Ratio > 1 indicates circumcision is associated with lower risk of HIV.
  99. Figure 38.2 HIV as function of circumcision - in three sets of studies
  100. Figure 41.1 Effect size in four fictional studies
  101. Figure 46.1 Forest plot using lines to represent the effect size
  102. Figure 46.2 Forest plot using boxes to represent the effect size and relative weight
  103. Figure 47.1 Impact of streptokinase on mortality - forest plot
  104. Figure 47.2 Impact of streptokinase on mortality - cumulative forest plot
  105. Figure 48.1 Forest plot of five fictional studies and a new trail (consistent effects)
  106. Figure 48.2 Forest plot of five fictional studies and a new trial (heterogeneous effects)
  107. Figure 49.1 Data-entry screen in CMA.
  108. Figure 49.2 Basic analysis screen in CMA
  109. Figure 49.3 Average effect size (top), Variation in effect size (bottom)
  110. Figure 49.4 Plotting...

Erscheint lt. Verlag 20.4.2021
Sprache englisch
Themenwelt Mathematik / Informatik Mathematik Statistik
Mathematik / Informatik Mathematik Wahrscheinlichkeit / Kombinatorik
Studium Querschnittsbereiche Epidemiologie / Med. Biometrie
Schlagworte Allg. Naturwissenschaft • Biostatistics • Biostatistik • General Science • Medical Science • Medical Sciences Special Topics • Medizin • Sozialwissenschaften • Spezialthemen Medizin • Statistics • Statistik
ISBN-10 1-119-55839-5 / 1119558395
ISBN-13 978-1-119-55839-2 / 9781119558392
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