The number of studies that used Embase but not MEDLINE did not change between the pre-2010 and post-2010 periods. We hypothesized that studies that used Embase but not MEDLINE would increase due to the Embase coverage expansion. We then examined 100 randomly selected records from each of the 5 years before and 5 years after the Embase coverage expansion in 2010.

We searched the names of institutions with confirmed Embase access in Ovid MEDLINE and Embase to retrieve works authored by affiliates of those institutions. We contacted libraries of 140 and 17 medical schools in the United States and Canada, respectively, to confirm their subscriptions to Embase 5 years before and 5 years after 2010. The research tested the authors’ hypothesis that more researchers from the academic medicine community in the United States and Canada with institutional access to Embase had started using Embase to replace MEDLINE since Embase was expanded in 2010 to cover all MEDLINE records. Received December 2016: Accepted February 2017 Michael Thomas Lam, Christina De Longhi, Joseph Turnbull, Helen Rose Lam, Reena Besa Has Embase replaced MEDLINE since coverage expansion? Has Embase replaced MEDLINE since coverage expansion? Original Investigation

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