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How Can We Quantify and Compare Harm in Surgical Trials?

Jesa Nadine Protasio1, Anthony King2, Louis R Pasquale3

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Area of Science:

  • Ophthalmology
  • Clinical Trials
  • Surgical Interventions

Background:

  • Assessing treatment harm in ophthalmology clinical trials presents challenges due to small sample sizes and event numbers.
  • Standardized methods for quantifying and comparing surgical harm are needed for robust trial interpretation.

Purpose of the Study:

  • To describe methods for quantifying and comparing harm from surgical interventions in ophthalmology trials.
  • To introduce a novel approach for analyzing complication data in glaucoma surgery trials.

Main Methods:

  • A consensus-derived severity classification system was applied to data from the Tube Versus Trabeculectomy (TVT) glaucoma trial.
  • A total harm score was calculated by multiplying complication severity by the number of affected patients for each intervention.
  • Graphical tools were utilized to visualize differences in complications between treatment arms.

Main Results:

  • Quantification and graphical representation of surgical harm are feasible despite challenges in randomized controlled trials.
  • The developed method allows for a more detailed analysis of complication data in glaucoma surgery.

Conclusions:

  • Further attention to analyzing harm data in clinical trials is warranted.
  • A severity classification system and total harm score can effectively quantify harm following glaucoma surgery.
  • Graphical tools enhance the interpretation of complication data in surgical trials.