Metan: fixed- and random-effects meta-analysis
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This article describes updates of the meta-analysis command metan and options that have been added since the command's original publication (Bradburn, Deeks, and Altman, metan – an alternative meta-analysis command, Stata Technical Bulletin Reprints, vol. 8, pp. 86–100). These include version 9 graphics with flexible display options, the ability to meta-analyze precalculated effect estimates, and the ability to analyze subgroups by using the by() option. Changes to the output, saved variables, and saved results are also described.
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Two researchers assessed risk of bias using the Cochrane Risk of Bias Tool, version 1.0, with discrepancies resolved by consensus with a third reviewer.
“Two researchers (including C.B.) assessed risk of bias using the Cochrane Risk of Bias Tool, version 1.0.14 Discrepancies were resolved by consensus with a third reviewer (C.L.H.).”
From Association of Antenatal Diet and Physical Activity–Based Interventions With Gestational Weight Gain and Pregnancy Outcomes: A Systematic Review and Meta-analysis (2022) · cites this paper as [14]
The Introduction (p. 1) describes methods for pooling study results, and the Example (p. 8) demonstrates the metan command. Searches for the Cochrane Risk of Bias Tool, version 1.0, and reviewer consensus found no passage addressing the cited risk-of-bias assessment. (LLM, conf=0.78)
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- Authors
- Harris, R. J., Deeks, J. J., Altman, D. G., Bradburn, M. J., Harbord, R. M., & Sterne, J. A. C.
- Affiliations
- University of Bristol (GB)
- University Medical Center Utrecht (NL)
- University of Oxford (GB)
- University of Sheffield (GB)
- Corresponding author
- Harris, Ross J.
- Venue
- The Stata Journal: Promoting communications on statistics and Stata
- Publisher
- SAGE Publications
- Published
- 2008-04
- Volume
- 8
- Issue
- 1
- Pages
- 3-28
- ISSN
- 1536-867X (ISSN-L)
- 1536-8734
- OpenAlex
- W1595237219
- Cited by
- 1,027
- References
- 18
- Citations by year
- 2026: 15 · 2025: 49 · 2024: 59 · 2023: 83 · 2022: 77 · 2021: 105 · 2020: 85 · 2019: 78 · 2018: 53 · 2017: 78 · 2016: 67 · 2015: 80 · 2014: 50 · 2013: 57 · 2012: 32
- FWCI
- 21.93
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Stata Journal Promoting communications on statistics and Stata (publishedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- Explore Bristol Research (submittedVersion)
- AgEcon Search (University of Minnesota, USA) (submittedVersion, cc-by-nc-nd)
- University of Birmingham Research Portal (University of Birmingham) (submittedVersion)
- Bristol Research (University of Bristol) (submittedVersion)
- AgEcon Search (University of Minnesota, USA)
- Topics
- Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
- Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Epidemiology
- Physical Sciences › Computer Science › Artificial Intelligence › Data Analysis with R
- Keywords
- Stata, fixed-effects meta-analysis, random-effects meta-analysis, subgroup analysis
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
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