Twelve months. That’s the minimum recommendation by Tian et al for follow-up after CME to detect changes in physician behavior or their patients’ outcomes. Anything less than that may not be sufficient for new knowledge or skills to be incorporated into practice – or reconized in patient outcomes. Tian et al came to that conclusion in their systematic review of CME evaluations published between 2000-2006 (abstract). Although the authors admit that the data available doesn’t end the debate on appropriate follow-up period, what alternative justification are you using to determine your follow-up period?