Meta-Analysis of Different Procedures: The Importance of Recognizing the Spectrum of Pleurectomy/Decortication Techniques

Our plain-English summary of Meta-Analysis of Different Procedures: The Importance of Recognizing the Spectrum of Pleurectomy/Decortication Techniques, by C. Cao, D.H. Tian, H. Wolfenden, et al (The Annals of Thoracic Surgery, 2015).

The study

• Authors: C. Cao, D.H. Tian, H. Wolfenden, J.E. Ozdirik, T.D. Yan
• Journal: The Annals of Thoracic Surgery
• Published: 2015;100(3):1133
• Type of article: Letter, Comment
• Cited by: 2 articles, as counted by NIH iCite
• Read it: PubMed · Publisher

In plain English

This is a letter to the editor, not a study, and it reports no new patient data. The authors, who had published their own meta-analysis of mesothelioma surgery, criticized a meta-analysis by Taioli and colleagues that compared pleurectomy/decortication (P/D) with extrapleural pneumonectomy (EPP). They noted that the International Mesothelioma Interest Group divides P/D into "extended P/D," "P/D," and "partial pleurectomy," and that only extended P/D aims to remove all visible tumor, as EPP does. They argued that Taioli and colleagues grouped procedures from partial pleurectomy to extended P/D together, which may explain the statistical heterogeneity found. They also wrote that the survival analysis gave a 1-patient study the same weight as one with more than 300, that the 2-year time frame was arbitrary, and that one study's figures differed from the original article: 8.2% and 22.2% 2-year mortality for P/D and EPP, against 91.1% and 77.5%. The authors concluded that the meta-analysis reached the same conclusion as theirs but had inaccuracies in design, data collection, and statistical analysis.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: Letter to the editor commenting on another group's published meta-analysis; no new data
• Who was studied: No patients studied; the letter discusses the studies pooled in the Taioli and colleagues meta-analysis of P/D versus EPP
• Exposure: No asbestos exposure was studied. The subject is types of surgery: pleurectomy/decortication (classified as extended P/D, P/D, and partial pleurectomy) compared with extrapleural pneumonectomy
• Main results:
  • The authors stated that only extended P/D removes all gross tumor with the same intent of complete cytoreduction as EPP
  • The authors argued that Taioli and colleagues pooled P/D procedures ranging from partial pleurectomy to extended P/D, which may account for the significant statistical heterogeneity detected
  • The authors stated that each comparative study in their own meta-analysis reported on extended P/D
  • The authors wrote that the median survival analysis gave studies with as few as 1 patient the same weight as studies with more than 300 patients
  • The authors called the 2-year time frame for survival arbitrary and said data extractable from Kaplan-Meier graphs in some studies were excluded
  • The authors reported that the analyzed 2-year mortality of 8.2% for P/D and 22.2% for EPP differed from the 91.1% and 77.5%, respectively, reported in the original article by Allen and colleagues
• The authors' conclusion: The authors concluded that, although the Taioli meta-analysis reached the same conclusion as their own earlier report, it had a number of inaccuracies in study design, data collection, and statistical analysis
• Limitations the authors state:
  • The authors acknowledged that their own earlier meta-analysis included fewer studies

Topics

The National Library of Medicine indexes this study under subjects our site covers: Mesothelioma.

Medical terms in this study, explained in our Lexicon: Meta-Analysis, Pleurectomy/Decortication (P/D).

Related studies

• Meta-analysis of survival after pleurectomy decortication versus extrapleural pneumonectomy in mesothelioma — E. Taioli, A.S. Wolf, et al. (2015)
• Thoracic shaping technique to avoid residual space after extended pleurectomy/decortication — S. Bölükbas, M. Eberlein, et al. (2013)
• Extrapleural pneumonectomy or pleurectomy/decortication for malignant pleural mesothelioma — S. Hasegawa (2014)
• Extrapleural Pneumonectomy Versus Pleurectomy/Decortication for Malignant Pleural Mesothelioma — N. Zhou, D.C. Rice, et al. (2022)
• Current Treatment of Mesothelioma: Extrapleural Pneumonectomy Versus Pleurectomy/Decortication — A.S. Wolf, R.M. Flores (2016)
• Short-term outcomes of pleurectomy decortication and extrapleural pneumonectomy in mesothelioma — M. van Gerwen, A. Wolf, et al. (2018)

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