|ANSWER TO THE QUIZ
|Year : 2020 | Volume
| Issue : 2 | Page : 108
Answer to the Quiz from editorial desk: Visualize and analyze
RajKumar Maurya, Vivek Saxena, BK N Babu
Army Dental Centre (R and R), Delhi, India
|Date of Submission||30-May-2020|
|Date of Acceptance||30-May-2020|
|Date of Web Publication||15-Jul-2020|
Army Dental Centre (R and R), Delhi Cantt, Delhi - 110 010
Source of Support: None, Conflict of Interest: None
|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
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.,[Figure 1]
| Components of Plot|| |
- 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|| |
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.” The first use of the name “forest plot” was published in 1996 in a review of nursing interventions for pain.
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| References|| |
McGill R, Tukey JW, Larsen WA. Variations of box plots. Am Stat 1978;32:12-6.
Lewis S, Clarke M. Forest plots: Trying to see the wood and the trees. BMJ 2001;322:1479-80.
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.