Introduction, comparison, and validation of Meta‐Essentials : A free and simple tool for meta‐analysis
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Abstract
We present a new tool for meta‐analysis, Meta‐Essentials , which is free of charge and easy to use. In this paper, we introduce the tool and compare its features to other tools for meta‐analysis. We also provide detailed information on the validation of the tool. Although free of charge and simple, Meta‐Essentials automatically calculates effect sizes from a wide range of statistics and can be used for a wide range of meta‐analysis applications, including subgroup analysis, moderator analysis, and publication bias analyses. The confidence interval of the overall effect is automatically based on the Knapp‐Hartung adjustment of the DerSimonian‐Laird estimator. However, more advanced meta‐analysis methods such as meta‐analytical structural equation modelling and meta‐regression with multiple covariates are not available. In summary, Meta‐Essentials may prove a valuable resource for meta‐analysts, including researchers, teachers, and students.
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Comprehensive Meta-Analysis v.3 is considered highly reliable and valid in various systematic assessments.
“To perform our analyses, we used Comprehensive Meta-Analysis v.3 [84], a program considered highly reliable and valid in various systematic assessments [85, 86].”
From Does time management work? A meta-analysis (2021) · cites this paper as [86]
The Meta-analysis tools section includes CMA among programs frequently used by scholars across disciplines. The Validation section reports agreement between Meta-Essentials and CMA v.2.041 on tested analyses, but it does not establish that CMA v.3 is highly reliable and valid across various systematic assessments. (LLM, conf=0.84)
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Cites
Borenstein, M., Hedges, L. V., Higgins, J. P. T., & Rothstein, H. R. (2009) · doi:10.1002/9780470743386 · Cited by 14,225 · see citing works
Sterne, J. A. C., Sutton, A. J., Ioannidis, J. P. A., Terrin, N., Jones, D. R., Lau, J., Carpenter, J., Rucker, G., Harbord, R. M., Schmid, C. H., et al. (2011) · BMJ · doi:10.1136/bmj.d4002 · Cited by 7,709 · see citing works
Primary, Secondary, and Meta-Analysis of Research
GLASS, G. V. (1976) · Educational Researcher · doi:10.3102/0013189x005010003 · Cited by 4,890 · see citing works
The Handbook of Research Synthesis and Meta-Analysis
(2019) · doi:10.7758/9781610448864 · Cited by 4,553 · see citing works
Interpretation of random effects meta-analyses
Riley, R. D., Higgins, J. P. T., & Deeks, J. J. (2011) · BMJ · doi:10.1136/bmj.d549 · Cited by 2,884 · see citing works
A Re-Evaluation of Random-Effects Meta-Analysis
Higgins, J. P. T., Thompson, S. G., & Spiegelhalter, D. J. (2009) · Journal of the Royal Statistical Society Series A: Statistics in Society · doi:10.1111/j.1467-985x.2008.00552.x · Cited by 2,569 · cited 1× · see citing works
“139 If we assume that all studies provide estimates of different true effects, we must also assume that no single overall effect size can express these different true effects' best.(39) Therefore, the prediction interval accurately embraces the notion of heterogeneity and the dispersion of true effects.”
BackgroundEllis, P. D. (2010) · doi:10.1017/cbo9780511761676 · Cited by 2,461 · see citing works
IntHout, J., Ioannidis, J. P., & Borm, G. F. (2014) · BMC Medical Research Methodology · doi:10.1186/1471-2288-14-25 · Cited by 2,419 · see citing works
Basics of meta‐analysis: <i>I</i> <sup>2</sup> is not an absolute measure of heterogeneity
Borenstein, M., Higgins, J. P. T., Hedges, L. V., & Rothstein, H. R. (2017) · Research Synthesis Methods · doi:10.1002/jrsm.1230 · Cited by 1,848 · see citing works
Methods to estimate the between‐study variance and its uncertainty in meta‐analysis
Veroniki, A. A., Jackson, D., Viechtbauer, W., Bender, R., Bowden, J., Knapp, G., Kuss, O., Higgins, J. P., Langan, D., & Salanti, G. (2016) · Research Synthesis Methods · doi:10.1002/jrsm.1164 · Cited by 1,685 · see citing works
Schwarzer, G., Carpenter, J. R., & Rücker, G. (2015) · Use R! · doi:10.1007/978-3-319-21416-0 · Cited by 1,230 · see citing works
Field, A. P., & Gillett, R. (2010) · British Journal of Mathematical and Statistical Psychology · doi:10.1348/000711010x502733 · Cited by 1,162 · see citing works
Closing the Gap between Methodologists and End-Users: <i>R</i> as a Computational Back-End
Wallace, B. C., Dahabreh, I. J., Trikalinos, T. A., Lau, J., Trow, P., & Schmid, C. H. (2012) · Journal of Statistical Software · doi:10.18637/jss.v049.i05 · Cited by 1,125 · see citing works
A comparison of heterogeneity variance estimators in combining results of studies
Sidik, K., & Jonkman, J. N. (2007) · Statistics in Medicine · doi:10.1002/sim.2688 · Cited by 380 · see citing works
A systematic comparison of software dedicated to meta-analysis of causal studies
Bax, L., Yu, L.-M., Ikeda, N., & Moons, K. G. (2007) · BMC Medical Research Methodology · doi:10.1186/1471-2288-7-40 · Cited by 210 · see citing works
Association between depression and resilience in older adults: a systematic review and meta-analysis
Wermelinger Ávila, M. P., Lucchetti, A. L. G., & Lucchetti, G. (2017) · International Journal of Geriatric Psychiatry · doi:10.1002/gps.4619 · Cited by 148 · see citing works
Flagged first, then by citations
Research works printed but not linked: 55
- [5]Ellis PD. The Essential Guide to Effect Sizes. Cambridge, UK: Cambridge University Press; 2010.
- [6]Aloe AM. An empirical investigation of partial effect sizes in meta‐analysis of correlational data. J Gen Psychol. 2014; 141: 47‐ 64. 24838020
- [7]Aloe AM, Becker BJ. An effect size for regression predictors in meta‐analysis. J Educ Behav Stat. 2012; 37: 278‐ 297.
- [10]Schmid CH, Stewart GB, Rothstein HR, Lajeunesse MJ, Gurevitch J. Software for Statistical Meta‐Analysis In: Koricheva J, Gurevitch J, Mengersen K, eds. Handbook of Meta‐Analysis in Ecology and Evolution. Princeton and Oxford: Princeton University Press; 2013.
- [11]Palmer TM, Sterne JAC. Meta‐analysis in Stata: an Updated Collection From the Stata Journal. Stata Press; 2016.
- [14]Review Manager (RevMan). [Computer Program]. Version 5.3. Copenhagen: The Nordic Cochrane Centre, The Cochrane Collaboration; 2014.
- [15]Schwarzer G. Meta: an R package for meta‐analysis. R News. 2007; 7: 40‐ 45.
- [16]Viechtbauer W. Conducting meta‐analyses in R with the metafor package. J Stat Softw. 2010; 36: 1‐ 48.
- [19]Higgins JPT, Green S (eds.), 2011 Cochrane handbook for systematic reviews of interventions [Updates March 2011], The Cochrane Collaboration http://handbook.cochrane.org.
- [20]DerSimonian R, Laird N, 1986 Meta‐analysis in clinical trials. Controlled clinical trials. 3802833
- [21]Chung Y, Rabe‐Hesketh S, Choi IH. Avoiding zero between‐study variance estimates in random‐effects meta‐analysis. Stat Med. 2013; 32: 4071‐ 4089. 23670939
- [24]Hardy RJ, Thompson SG. A likelihood approach to meta‐analysis with random effects. Stat Med. 1996; 15: 619‐ 629. 8731004
- [25]Thompson SG, Sharp SJ. Explaining heterogeneity in meta‐analysis: a comparison of methods. Stat Med. 1999; 18: 2693‐ 2708. 10521860
- [26]Deeks JJ. Issues in the selection of a summary statistic for meta‐analysis of clinical trials with binary outcomes. Stat Med. 2002; 21: 1575‐ 1600. 12111921
- [28]Cummings P. The relative merits of risk ratios and odds ratios. Arch Pediatr Adolesc Med. 2009; 163: 438‐ 445. 19414690
- [29]Sinclair JC, Bracken MB. Clinically useful measures of effect in binary analyses of randomized trials. J Clin Epidemiol. 1994; 47: 881‐ 889. 7730891
- [30]Zhang J, Yu KF. What's the relative risk? A method of correcting the odds ratio in cohort studies of common outcomes. JAMA. 1998; 280: 1690‐ 1691. 9832001
- [31]Localio AR, Margolis DJ, Berlin JA. Relative risks and confidence intervals were easily computed indirectly from multivariable logistic regression. J Clin Epidemiol. 2007; 60: 874‐ 882. 17689803
- [32]Daly LE. Confidence limits made easy: interval estimation using a substitution method. Am J Epidemiol. 1998; 147: 783‐ 790. 9554420
- [33]McNutt LA. Estimating the relative risk in cohort studies and clinical trials of common outcomes. Am J Epidemiol. 2003; 157: 940‐ 943. 12746247
- [35]Sanchez‐Meca J, Marin‐Martinez F, Sánchez‐Meca J, Marín‐Martínez F. Confidence intervals for the overall effect size in random‐effects meta‐analysis. Psychol Methods. 2008; 13: 31‐ 48. 18331152
- [37]Kiran A, Crespillo AP, Rahimi K. Graphics and statistics for cardiology: data visualisation for meta‐analysis. Heart. 2017; 103: 19‐ 23. 27810865
- [44]Hyndman RJ, Fan Y. Sample quantiles in statistical packages. Am Stat. 1996; 50: 361
- [45]Aboodarda SJ, Page PA, Behm DG. Muscle activation comparisons between elastic and isoinertial resistance: a meta‐analysis. Clin Biomech. 2016; 39: 52‐ 61. 27681867
- [46]Barreto NB, Hogg MA. Evaluation of and support for group prototypical leaders: a meta‐analysis of twenty years of empirical research. Soc Influ. 2017; 12: 41‐ 55.
- [47]Boot N, Nevicka B, Baas M. Subclinical symptoms of attention‐deficit/hyperactivity disorder (ADHD) are associated with specific creative processes. Personal Individ Differ. 2017; 114: 73‐ 81.
- [48]Burmester B, Leathem J, Merrick P. Subjective cognitive complaints and objective cognitive function in aging: a systematic review and meta‐analysis of recent cross‐sectional findings. Neuropsychol Rev. 2016; 26: 376‐ 393. 27714573
- [49]Dickinson T, Becerra R, Coombes J. Executive functioning deficits among adults with bipolar disorder (types I and II): a systematic review and meta‐analysis. J Affect Disord. 2017; 28501741
- [50]Graziani F, Gennai S, Lillo L, Petrini M, 2017 A systematic review and meta‐analysis of epidemiologic observational evidence on glycaemic control and risk of developing diabetes in healthy patietns. In: 18th International Congress SIdP. Italian Society of Periodontology and Implantology, Rimini, Italy.
- [51]Jones MK, Dickter B, Beard C, Perales R, Bunge EL. Meta‐analysis on cognitive behavioral treatment and behavioral intervention technologies for anxious youth: more than a BIT effective. Contemp Behav Health Care. 2016; 1: 1‐ 9.
- [52]Kavé G, Goral M. Word retrieval in connected speech in Alzheimer's disease: a review with meta‐analyses. Aphasiology. 2017; 1‐ 23.
- [53]Moery E, Calin‐Jageman RJ. Direct and conceptual replications of Eskine (2013): organic food exposure has little to no effect on moral judgments and prosocial behavior. Soc Psychol Personal Sci. 2016a; 7: 312‐ 319.
- [54]Moery E, Calin‐Jageman RJ. Direct and conceptual replications of Eskine (2013): organic food exposure has little to no effect on moral judgments and prosocial behavior. Soc Psychol Personal Sci. 2016b; 7: 1‐ 8.
- [56]Mummareddy N, Dewan MC, Mercier MR, Naftel RP, Iii JCW, Bonfield CM, Scoliosis in myelomeningocele: epidemiology, management, and functional outcome. 2017; 1– 10. 28452655
- [57]Richardson M, McEwan K, Maratos F, Sheffield D. Joy and calm: how an evolutionary functional model of affect regulation informs positive emotions in nature. Evol Psychol Sci. 2016; 2: 308‐ 320.
- [58]Schreglmann SR, Krauss JK, Chang JW, Bhatia KP, Kaegi G. Functional lesional neurosurgery for tremor—a protocol for a systematic review and meta‐analysis. BMJ Open. 2017; 7. PMC5623440 28487460
- [59]Sridharan K, Sivaramakrishnan G. Tranexamic acid in total hip arthroplasty: a recursive cumulative meta‐analysis of randomized controlled trials and assessment of publication bias. J Orthop. 2017; 14: 323‐ 328. 28559649 PMC5440691
- [61]van Halewijn G, Deckers J, Tay HY, van Domburg R, Kotseva K, Wood D. Lessons from contemporary trials of cardiovascular prevention and rehabilitation: a systematic review and meta‐analysis. Int J Cardiol. 2017; 232: 294‐ 303. 28094128
- [63]Vuong HG, Altibi AMA, Duong UNP, Hassell L. Prognostic implication of BRAF and TERT promoter mutation combination in papillary thyroid carcinoma––a meta‐analysis. Clin Endocrinol (Oxf). 2017a; 38: 42‐ 49. 28666074
- [64]Vuong HG, Altibi AMA, Duong UNP, et al. BRAF mutation is associated with an improved survival in glioma—a systematic review and meta‐analysis. Mol Neurobiol. 2017b. 28534272
- [65]Vuong HG, Duong UNP, Altibi AMA, et al. A meta‐analysis of prognostic roles of molecular markers in papillary thyroid carcinoma. Endocrine Connections. 2017c. PMC5424840 28219937
- [67]Rothstein H, Sutton A, Borenstein M. Publication Bias in Meta‐analysis: Prevention, Assessment and Adjustments. Chichester, UK: Wiley; 2006.
- [68]Lau J, Ioannidis JPA, Terrin N, Schmid CH, Olkin I. The case of the misleading funnel plot. BMJ. 2006; 333: 597‐ 600. 16974018 PMC1570006
- [70]Cumming G, Calin‐Jageman R. Introduction to the New Statistics: Estimation, Open Science, and Beyond. New York: Routledge; 2016.
- [71]Li T, Saldanha IJ, Vedula SS, et al. Learning by doing‐teaching systematic review methods in 8 weeks. Res Synth Methods. 2014; 5: 254‐ 263. 26052850
- [73]Yan T, Kull TJ. Supplier opportunism in buyer‐supplier new product development: a China–U.S. study of antecedents, consequences, and cultural/institutional contexts. Decisi Sci. 2015; 46: 403‐ 445.
- [74]Tessarolo P. Is integration enough for fast product development? An empirical investigation of the contextual effects of product vision. J Prod Innov Manag. 2007; 24: 69‐ 82.
- [75]Parker DB, Zsidisin GA, Ragatz GL. Timing and extent of supplier integration in new product development: a contingency approach. J Supply Chain Manag. 2008; 44: 71‐ 83.
- [76]Lin R‐J. Supplier integration and time‐based capabilities: an empirical study. J Chin Inst Ind Eng. 2009; 26: 215‐ 227.
- [77]Koufteros X, Rawski GE, Rupak R. Organizational integration for product development: the effects on glitches, on‐time execution of engineering change orders, and market success. Decis Sci. 2010; 41: 49‐ 80.
- [78]Perols J, Zimmermann C, Kortmann S. On the relationship between supplier integration and time‐to‐market. J Oper Manag. 2013; 31: 153‐ 167.
- [79]Yan T, Dooley KJ. Communication intensity, goal congruence, and uncertainty in buyer‐supplier new product development. J Oper Manag. 2013; 31: 523‐ 542.
- [80]Lau AKW, Tang E, Yam RCM. Effects of supplier and customer integration on product innovation and performance: empirical evidence in Hong Kong manufacturers. J Prod Innov Manag. 2010; 27: 761‐ 777.
- [83]Laseter TM, Ramdas K. Product types and supplier roles in product development: an exploratory analysis. IEEE Trans Eng Manag. 2002; 49: 107‐ 118.
- [84]Lipsey MW, Wilson D. Practical Meta‐analysis. Thousand Oaks, London, New Delhi: SAGE Publications; 2001.
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“3 [84], a program considered highly reliable and valid in various systematic assessments [85, 86].”
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- Authors
- Suurmond, R., van Rhee, H., & Hak, T.
- Affiliations
- Erasmus University Rotterdam (NL)
- Rotterdam School of Management Erasmus University The Netherlands
- Corresponding author
- Suurmond, Robert
- Venue
- Research Synthesis Methods
- Publisher
- Wiley
- Published
- 2017-09-29
- Volume
- 8
- Issue
- 4
- Pages
- 537-553
- ISSN
- 1759-2879 (ISSN-L)
- 1759-2887
- PMC
- PMC5725669
- OpenAlex
- W2742272122
- Cited by
- 881
- References
- 16
- Citations by year
- 2026: 70 · 2025: 119 · 2024: 118 · 2023: 133 · 2022: 138 · 2021: 136 · 2020: 104 · 2019: 47 · 2018: 16
- FWCI
- 40.86
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Research Synthesis Methods (publishedVersion, cc-by-nc-nd)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Research Publications (Maastricht University) (publishedVersion, cc-by-nc-nd)
- EUR Research Repository (Erasmus University Rotterdam) (publishedVersion, other-oa)
- EUR Research Repository (Erasmus University Rotterdam) (submittedVersion, other-oa)
- RePub (Erasmus University Rotterdam) (submittedVersion, other-oa)
- Research Publications (Maastricht University) (submittedVersion, other-oa)
- ERIM Top-Core Articles
- Topics
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › scientometrics and bibliometrics research
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Psychology Research and Bibliometrics
- Keywords
- meta-analysis software, free software, effect size estimation, confidence intervals, subgroup analysis, moderator analysis, publication bias, software validation, software comparison
- MeSH terms
- Algorithms, Computers, Humans, Programming Languages, Regression Analysis, Software, Meta-Analysis as Topic, Models, Statistical, Publication Bias, Validation Studies as Topic
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