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Year : 2020  |  Volume : 14  |  Issue : 2  |  Page : 108

Answer to the Quiz from editorial desk: Visualize and analyze

Army Dental Centre (R and R), Delhi, India

Date of Submission30-May-2020
Date of Acceptance30-May-2020
Date of Web Publication15-Jul-2020

Correspondence Address:
RajKumar Maurya
Army Dental Centre (R and R), Delhi Cantt, Delhi - 110 010
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JODD.JODD_39_20

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How to cite this article:
Maurya R, Saxena V, N Babu B K. Answer to the Quiz from editorial desk: Visualize and analyze. J Dent Def Sect. 2020;14:108

How to cite this URL:
Maurya R, Saxena V, N Babu B K. Answer to the Quiz from editorial desk: Visualize and analyze. J Dent Def Sect. [serial online] 2020 [cited 2021 Jan 22];14:108. Available from: http://www.journaldds.org/text.asp?2020/14/2/108/289754

The image is depicting the schematic representation of “Forest Plot.” Forest plots are graphic displays that are used to illustrate individual and estimated group data from a meta-analysis of multiple studies that answer the same research question.[1],[2][Figure 1]
Figure 1: Identify the image

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  Components of Plot Top

  • The centered solid vertical line “Y” axis = Represents no change between intervention and treatment group
  • The horizontal “X” axis at bottom = Represents the gradation of the associated positive or negative effect of studies
  • Centered Squares = Point estimate of the result of each study
  • The area of each square = Proportional to the weight that the individual study contributed to the meta-analysis
  • A horizontal line passing through the square = Represents the confidence interval (CI) i.e., the chance that these results would occur in 95% of cases. The CI of clinical trial results is stated in each study as a measure of reliability (e.g., that the study is repeatable over and over with nearly the same results)
  • Diamond = Overall measure of effect, as noted in the meta-analysis, is typically represented in dashed lines, or as a red (or black) diamond. The center of the diamond represents the overall estimate, and the width or lateral points of the diamond indicate overall CIs.

  Interesting Fact Top

As per the literature, Richard Peto jokingly mentioned that nomenclature of the plot is after the breast cancer researcher Pat Forrest at Breast cancer review meet 1990; hence, the name is called “forrest plot.” However, in reality, since a typical plot appears as a “forest of lines” it is known as “Forest Plot.”[3] The first use of the name “forest plot” was published in 1996 in a review of nursing interventions for pain.[3]

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Conflicts of interest

There are no conflicts of interest.

  References Top

McGill R, Tukey JW, Larsen WA. Variations of box plots. Am Stat 1978;32:12-6.  Back to cited text no. 1
Lewis S, Clarke M. Forest plots: Trying to see the wood and the trees. BMJ 2001;322:1479-80.  Back to cited text no. 2
David LS, Douglas GA, Julia AV, ThomasH, David M. Forest plots in reports of systematic reviews: A cross-sectional study reviewing current practice. Int J Epidemiol 2010;39:421-9.  Back to cited text no. 3


  [Figure 1]


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