Construct, concurrent, and content validity of the eoSim laparoscopic simulator.

BACKGROUND

The purpose of this study was to validate the eoSim box laparoscopic simulator using measures of construct, concurrent, and content validity.

SUBJECTS AND METHODS

Forty-seven novice and expert participants were tested on both the Fundamentals of Laparoscopic Surgery (FLS™; Society of American Gastrointestinal and Endoscopic Surgeons, Los Angles, CA) and eoSim (eoSurgical™, Edinburgh, Scotland, United Kingdom) laparoscopic simulators, using established scoring mechanisms. Three skill areas were examined: object transfer, precision cutting, and intracorporeal suturing. A questionnaire was also completed.

RESULTS

Experts performed significantly better on the eoSim than novices, with a median score of 51.1% versus 14.8% (P<.0001), showing construct validity. There was a high correlation between performance on the validated FLS simulator and the eoSim (0.78; P<.0001), demonstrating concurrent validity. Feedback from participants indicated an agreement that the eoSim was a useful training tool providing content validity.

CONCLUSIONS

The eoSim demonstrates validity as a model for laparoscopic simulation. It is hoped that its decreased cost relative to other simulators will encourage increased uptake by trainees and institutions.