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Randomized Experiments

Randomized Experiments

The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
Simple randomization
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Related Experiment Video

Updated: Jun 19, 2026

Emergency Undocking in Robotic Surgery: A Simulation Curriculum

Emergency Undocking in Robotic Surgery: A Simulation Curriculum

Published on: May 20, 2018

Procedure-specific simulation for vaginal surgery training: A randomized controlled trial.

Roxana Geoffrion¹, Nicole A Koenig¹, Geoffrey W Cundiff¹

¹Division of Gynecologic Specialties, Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, Canada.

Acta Obstetricia Et Gynecologica Scandinavica

|February 21, 2024

Summary

This summary is machine-generated.

Procedure-specific simulation training significantly improved surgical competence and confidence for gynecologic residents in vaginal surgery compared to traditional methods. This approach enhances operative performance for procedures like vaginal hysterectomy.

Keywords:

gynecologic surgery low fidelity simulation surgical education vaginal hysterectomy

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Area of Science:

Medical Education
Surgical Simulation
Gynecologic Surgery

Background:

Vaginal surgery offers superior outcomes but faces declining resident skills due to low case volumes.
Graduating residents report decreased confidence and preparedness for vaginal surgery.
Investigating novel training methods is crucial to address skill deficits.

Purpose of the Study:

To compare the effectiveness of procedure-specific simulation skills training versus usual training methods.
To evaluate the impact on operative competence in vaginal surgery among novice gynecology residents.

Main Methods:

A randomized controlled trial involving novice gynecology residents at three academic centers.
Intervention group received didactic and low-fidelity simulation training for anterior repair, posterior repair (PR), and vaginal hysterectomy (VH).
Performance was assessed using the Global Rating Scale (GRS) in real surgical procedures by blinded attending surgeons.

Main Results:

A total of 83 residents were randomized, with 55 completing the trial.
The simulation group demonstrated significantly higher overall GRS scores (p=0.044) and for VH (p=0.02).
Intervention participants showed improved procedural knowledge and self-confidence for VH and/or PR (p<0.05).

Conclusions:

Procedure-specific didactic and low-fidelity simulation modules enhance operative performance in vaginal surgery.
Simulation-based training leads to significant improvements in skill parameters compared to conventional training.
This approach is effective in boosting resident competence and confidence in essential gynecologic procedures.