Letter to editor: the critical appraisal of “ efficacy of licorice extract in the treatment of melasma: a randomized, doubleblind, placebo-controlled clinical trial”

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Habibi Maede; YADEGARFAR GHASEM

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Dermatology and Cosmetics Year:2019 | Volume:10 | Issue:1 Page(s): 55-58

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Information Journal Paper

Title

Letter to editor: the critical appraisal of “ efficacy of licorice extract in the treatment of melasma: a randomized, doubleblind, placebo-controlled clinical trial”

Author(s)

Habibi Maede | YADEGARFAR GHASEM | Issue Writer Certificate

Keywords

critical appraisalQ1

melasmaQ3

licorice extractQ1

clinical trialQ3

nanoparticlesQ1

solid lipidQ1

Abstract

This is a letter to editor criticizing the paper entitled “ Efficacy of licorice extract in the treatment of melasma: A randomized, double-blind, placebo-controlled clinical trial” . We discuss some methodological points on external and internal validity of results. The paper suffers from lack of detailed information on sample size and power calculation to make sure generalisability of results to study population. The paper also did not report blinding procedure and placebo details. The results of the paper also suffer from multiplicity (multiple comparisons) and suitability of data analysis approach. It is recommended to apply either repeated measure ANOVA or a mixed model to consider correlation between repeated measure of outcomes and multiplicity problem.

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APA: Copy

Habibi, Maede, & YADEGARFAR, GHASEM. (2019). Letter to editor: the critical appraisal of “ efficacy of licorice extract in the treatment of melasma: a randomized, doubleblind, placebo-controlled clinical trial”. DERMATOLOGY AND COSMETIC, 10(1 ), 55-58. SID. https://sid.ir/paper/406132/en

Vancouver: Copy

Habibi Maede, YADEGARFAR GHASEM. Letter to editor: the critical appraisal of “ efficacy of licorice extract in the treatment of melasma: a randomized, doubleblind, placebo-controlled clinical trial”. DERMATOLOGY AND COSMETIC[Internet]. 2019;10(1 ):55-58. Available from: https://sid.ir/paper/406132/en

IEEE: Copy

Maede Habibi, and GHASEM YADEGARFAR, “Letter to editor: the critical appraisal of “ efficacy of licorice extract in the treatment of melasma: a randomized, doubleblind, placebo-controlled clinical trial”,” DERMATOLOGY AND COSMETIC, vol. 10, no. 1 , pp. 55–58, 2019, [Online]. Available: https://sid.ir/paper/406132/en

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