The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
Forest plots: trying to see the wood and the trees
Open accessAbstract
Few systematic reviews containing meta-analyses are complete without a forest plot. But what are forest plots, and where did they come from? #### Summary points Forest plots show the information from the individual studies that went into the meta-analysis at a glance They show the amount of variation between the studies and an estimate of the overall result Forest plots, in various forms, have been published for about 20 years During this time, they have been improved, but it is still not easy to draw them in most standard computer packages In a typical forest plot, the results of component studies are shown as squares centred on the point estimate of the result of each study. A horizontal line runs through the square to show its confidence interval—usually, but not always, a 95% confidence interval. The overall estimate from the meta-analysis and its confidence interval are put at the bottom, represented as a diamond. The centre of the diamond …
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Cites
Beta blockade during and after myocardial infarction: An overview of the randomized trials
Yusuf, S., Peto, R., Lewis, J., Collins, R., & Sleight, P. (1985) · Progress in Cardiovascular Diseases · doi:10.1016/s0033-0620(85)80003-7 · Cited by 3,205
Freiman, J. A., Chalmers, T. C., Smith, H., & Kuebler, R. R. (1978) · New England Journal of Medicine · doi:10.1056/nejm197809282991304 · Cited by 1,628
Research works printed but not linked: 7
- Cochrane Collaboration . Cochrane Library. Issue 1. Oxford: Update Software, 2001.
- 10.2307/2683468 · DOI
- DeMets, 1987, Methods for combining randomized clinical trials: strengths and weaknesses, Stat Med, 6, 341, 10.1002/sim.4780060325 · DOI · Paper page
- Galbraith, 1988, A note on graphical presentation of estimated odds ratios from several clinical trials, Stat Med, 7, 889, 10.1002/sim.4780070807 · DOI · Paper page
- 1988, Secondary prevention of vascular disease by prolonged antiplatelet treatment, BMJ, 296, 320, 10.1136/bmj.296.6618.320 · DOI · Paper page
- Sindhu, 1996, Are non-pharmacological nursing interventions for the management of pain effective? A meta-analysis, J Adv Nurs, 24, 1152, 10.1111/j.1365-2648.1996.tb01020.x · DOI
- Bijnens L Collette L Ivanov A Hoctin Boes G Sylvester R . Optimal graphical display of the results of meta-analyses of individual patient data. In: Proceedings of the 4th Cochrane colloquium, Adelaide, Australia, 1996. Oxford: Cochrane Collaboration, 1996.
Cited by
Liberati, A., Altman, D. G., Tetzlaff, J., Mulrow, C., Gøtzsche, P. C., Ioannidis, J. P. A., Clarke, M., Devereaux, P. J., Kleijnen, J., & Moher, D. (2009) · PLoS Medicine · doi:10.1371/journal.pmed.1000100 · Cited by 28,164
Self-citationCochrane Handbook for Systematic Reviews of Interventions: Cochrane Book Series
(2008) · doi:10.1002/9780470712184 · Cited by 25,048
Conducting Meta-Analyses in R with the metafor Package
Viechtbauer, W. (2010) · Journal of Statistical Software · doi:10.18637/jss.v036.i03 · Cited by 20,464
Liberati, A., Altman, D. G., Tetzlaff, J., Mulrow, C., Gotzsche, P. C., Ioannidis, J. P. A., Clarke, M., Devereaux, P. J., Kleijnen, J., & Moher, D. (2009) · BMJ · doi:10.1136/bmj.b2700 · Cited by 17,648
Self-citationPage, M. J., Moher, D., Bossuyt, P. M., Boutron, I., Hoffmann, T. C., Mulrow, C. D., Shamseer, L., Tetzlaff, J. M., Akl, E. A., Brennan, S. E., et al. (2021) · BMJ · doi:10.1136/bmj.n160 · Cited by 13,262
Metadata
- Authors
- Lewis, S., & Clarke, M.
- Venue
- BMJ
- Publisher
- BMJ
- Published
- 2001-06-16
- Volume
- 322
- Issue
- 7300
- Pages
- 1479-1480
- ISSN
- 0007-1447 (ISSN-L)
- 0959-8138
- 1468-5833
- OpenAlex
- W2044414901
- Cited by
- 763
- References
- 2
- FWCI
- 7.48
- Type
- journal article
- Language
- en
- Open access
- green
- Licence
- www.bmj.com/company/legal-information/terms-conditions/legal-information/tdm-licencepolicy (tdm)
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Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
