Assessing the Value of Interactive Computer Testing and Videotape Presentation in the Informed Consent Process Preceding Colonoscopy

Abstract

Purpose: To analyze computer-assisted patient testing, and to reassess videotape and standard testing, in the informed consent process preceding colonoscopy. Methods: After a multiple-choice test of 11 questions was validated, 107 patients were randomly assigned to receive information needed to give informed consent for colonoscopy by either physician or videotape presentation. Participants were then administered either a computer-assisted test, a standard written test, or no initial test. All groups were retested with the standard written test immediately prior to undergoing colonoscopy two to four weeks thereafter. Results: Two-factor ANOVAs were performed on both the initial and retest results. Analysis of initial tests separately found that videotape presentation was superior to physician presentation (p = 0.001), and that use of a computer-assisted initial test approached statistical significance in leading to improved initial test scores when compared to standard testing (p = 0.077). Analysis of retests found that videotape presentation was superior to physician presentation (p = 0.005), having a computer-assisted initial test was superior to no initial test (p = 0.037), and having a standard initial test was superior to no initial test (p = 0.001). No difference was found on retests for those administered computer-assisted versus standard initial testing (p = 0.878). The mean number of questions missed is included in each figure.[figure 1][figure 2]FigureFigureConclusions: Patients given consent information via videotape had superior test scores to those who received consent information directly from their physicians. Administration of a multiple-choice test led to increased retention of information provided during the consent process.