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Statistical Fragility in Minimally Invasive Colorectal Surgery Studies: A Review of Randomized Trials

  • 0Department of Surgery, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA.
Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A +

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June 20, 2024

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June 20, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

The fragility index (FI) reveals that randomized controlled trials comparing minimally invasive surgery to open surgery for colorectal diseases are often not robust. Surgeons should consider FI alongside P-values for clinical decisions.

Area Of Science

  • Colorectal Surgery
  • Surgical Oncology
  • Clinical Trials

Background

  • The P-value is a common but limited statistical tool in randomized controlled trials (RCTs).
  • The fragility index (FI) offers a supplementary measure of study robustness for dichotomous outcomes.
  • Assessing the statistical fragility of RCTs comparing minimally invasive surgery (MIS) with open surgery is crucial for clinical practice.

Purpose Of The Study

  • To determine the statistical fragility of RCTs comparing MIS versus open techniques for benign and malignant colorectal diseases.
  • To evaluate the robustness of evidence supporting surgical approaches in colorectal disease management.

Main Methods

  • Systematic review of RCTs published between 2000 and 2023 comparing MIS and open surgery for colorectal diseases.
  • Calculation of the overall fragility index (FI) and fragility quotient (FQ) for each included study.
  • Analysis of dichotomous outcomes, P-values, and loss to follow-up data.

Main Results

  • Fifty RCTs involving 820 outcomes were included, with 747 non-significant (P ≥ .05) and 73 significant (P < .05).
  • The overall FI was 5 (IQR 4-7), and the FQ was 0.031 (IQR 0.014-0.062).
  • Twelve percent of RCTs had a loss to follow-up exceeding the overall FI.

Conclusions

  • RCTs comparing MIS and open colorectal surgery often demonstrate low statistical fragility, suggesting limited robustness.
  • Practicing colorectal surgeons should interpret the FI and FQ alongside P-values to critically evaluate study findings.
  • Considering study fragility enhances the assessment of evidence quality and informs clinical practice changes.

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