COMPARATIVE STUDY
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL

Comparison of directed and self-directed learning in evidence-based medicine: a randomised controlled trial

Peter Bradley, Christina Oterholt, Jeph Herrin, Lena Nordheim, Arild Bjørndal
Medical Education 2005, 39 (10): 1027-35
16178830

OBJECTIVES: To compare 2 educational programmes for teaching evidence-based medicine (EBM).

DESIGN: Prospective randomised controlled trial accompanied by a qualitative evaluation.

SETTING: University of Oslo, Norway, 2002-03.

PARTICIPANTS: A total of 175 students entered the study. All tenth semester medical students from 3 semesters were eligible for inclusion if they completed baseline assessment and consent forms and either attended teaching on the first day of the semester or gave reasons for their absence on the first day in advance. Interventions One intervention was based on computer-assisted, self-directed learning (self-directed intervention), whilst the other was organised as workshops based on social learning theory (directed intervention). Both educational interventions consisted of 5 half-day sessions.

MAIN OUTCOME MEASURES: The primary outcomes were knowledge about EBM and skills in critical appraisal. A secondary outcome measured attitudes to EBM. Outcomes were compared on an intention-to-treat basis using a stratified Wilcoxon rank-sum test.

RESULTS: There were no differences in outcomes for the 2 study groups in terms of EBM knowledge (mean deviation 0.0 [95% confidence interval - 1.0, 1.0], P = 0.8), critical appraisal skills (MD 0.1 [95% CI - 0.9, 1.1], P = 0.5), or attitudes to EBM (MD - 0.3 [95% CI - 1.4, 0.8], P = 0.5). Follow-up rates were 96%, 97% and 63%, respectively.

CONCLUSIONS: This trial and its accompanying qualitative evaluation suggest that self-directed, computer-assisted learning may be an alternative format for teaching EBM. However, further research is needed to confirm this and investigate alternative educational models.

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