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Meta-Analyses in Plastic Surgery: Can We Trust Their Results?
Connor McGuire1, Osama A Samargandi1, Joseph Corkum1
1From the Faculty of Medicine and the Division of Plastic and Reconstructive Surgery, Dalhousie University; the Division of Plastic and Reconstructive Surgery, University of Toronto; and the Division of Plastic and Reconstructive Surgery, Department of Surgery, King Abdulaziz University.
Quality of meta-analyses in plastic surgery is improving but remains a concern. Researchers found higher quality scores correlated with more recent studies and better management of statistical heterogeneity.
Area of Science:
- Plastic Surgery Research
- Evidence-Based Medicine
- Systematic Reviews
Background:
- Meta-analyses are frequently published in plastic surgery, yet their methodological quality is under-examined.
- A comprehensive assessment of meta-analysis quality in plastic surgery literature is needed.
Purpose of the Study:
- To evaluate the overall scientific quality of meta-analyses in plastic surgery.
- To identify factors associated with higher quality meta-analyses in this field.
Main Methods:
- A systematic review of meta-analyses published in seven plastic surgery journals from 2007 to 2017.
- Assessment of 74 meta-analyses using the A Measurement Tool to Assess Systematic Reviews (AMSTAR) and AMSTAR 2 instruments.
Main Results:
- The number of published meta-analyses has increased over time.
- Most meta-analyses included mid-level evidence and few randomized controlled trials.
- Median AMSTAR scores indicated moderate quality, with higher scores linked to recent studies and better handling of heterogeneity.
Conclusions:
- While meta-analysis quality shows improvement, significant biases persist due to the low evidence level of primary studies.
- Plastic surgeons must critically appraise and interpret meta-analyses cautiously, recognizing potential limitations.
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