Annals Consult Guys - Postural Orthostatic Tachycardia Syndrome: Redux
Authors: Geno J. Merli, Howard H. Weitz
Journal: Annals of Internal Medicine (2021)

Web ExclusivesSeptember 2021Annals Consult Guys - Postural Orthostatic Tachycardia Syndrome: ReduxFREEGeno J. Merli, MD, Howard H. Weitz, MDGeno J. Merli, MDThomas Jefferson University, Philadelphia, Pennsylvania (G.J.M., H.H.W.)Search for more papers by this author, Howard H. Weitz, MDThomas Jefferson University, Philadelphia, Pennsylvania (G.J.M., H.H.W.)Search for more papers by this authorAuthor, Article and Disclosure Informationhttps://doi.org/10.7326/W20-0025 CME/MOC SectionsSupplemental MaterialAboutVisual Abstract ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinkedInRedditEmail Annals Consult Guys brings a new perspective to the art and science of medicine with lively discussion and analysis of real-world cases and situations. They address medically relevant topics—whether they be poignant, thought-provoking, or just plain entertaining.For more videos from and information on Annals Consult Guys, visit go.annals.org/ConsultGuys. Comments0 CommentsSign In to Submit A Comment Robert BadgettKU School of Medicine - Wichita17 October 2021 Doubling time of medical knowledge Consult Guys: Great case as always. I show a slide several times a year to our medical students about the doubling time of medical knowledge. I have not updated it in a while so your case urged me to do so. Today, I calculate the doubling time to be between 18 and 36 years, depending on what set of journals is defined a medical knowledge (details below). In hunting down the source of the estimate that you use of 73 days, I find the paper below by Densen, but I do not see do not his source for the calculation. Have you found a different source for the estimate of 73 days and how the calculation was made? Densen P. Challenges and opportunities facing medical education. Trans Am Clin Climatol Assoc. 2011;122:48-58. PMID: 21686208; PMCID: PMC3116346. Calculations that I ran today: In Index Medicus (search PubMed for "IM?": All years: 2,096,926 2021: 64,032 Growth rate: 3% = 64,032/2,096,926 Doubling time, per https://en.wikipedia.org/wiki/Doubling_time is 24 years (72/3) Another calculation is if we currently have (through the end of 2021) 2,096,682 citations in Index Medicus, we had roughly half that number at the end of 2003 (1,068,187), then the doubling time over that time period was 18 years. Using all of Medline ("Medline[sb]") All years: 28,502,957 2021: 575,721 Growth rate: 2% = 575,721/28,502,957 Doubling time, per https://en.wikipedia.org/wiki/Doubling_time is 36 years (72/2) Thanks Bob [email protected]Institute: Chittagong Medical College Hospital ; University: BSMMU,Bangladesh2 October 2021 COMMENT REGARDING PRESENTATION Excellent presentation. I found it very much helpful! Author, Article and Disclosure InformationAffiliations: Thomas Jefferson University, Philadelphia, Pennsylvania (G.J.M., H.H.W.)Disclosures: Geno J. Merli, MD, and Howard H. Weitz, MD, report that they have no financial relationships or interests to disclose.Editors' Disclosures: Christine Laine, MD, MPH, Editor in Chief, reports that her spouse has stock options/holdings with Targeted Diagnostics and Therapeutics. Stephanie Chang, MD, MPH, Deputy Editor, reports employment with the Agency for Healthcare Research and Quality, travel compensation from the Guidelines International Network, and participation in the Patient-Centered Outcomes Research Institute methodology committee. Vineet Chopra, MD, MSc, Deputy Editor, reports grants received from the Agency for Healthcare Research and Quality and royalties from UpToDate and Oxford University Press. Deborah Cotton, MD, MPH, Deputy Editor, reports that she has no financial relationships or interests to disclose. Eliseo Guallar, MD, MPH, DrPH, Deputy Editor, Statistics, reports that he has no financial relationships or interests to disclose. Christina C. Wee, MD, MPH, Deputy Editor, reports employment with Beth Israel Deaconess Medical Center and consultancy with Boston Medical Center. Sankey V. Williams, MD, Deputy Editor, reports that he has no financial relationships or interests to disclose. Yu-Xiao Yang, MD, MSCE, Deputy Editor, reports employment with the Perelman School of Medicine, University of Pennsylvania, and consultancies with the U.S. Food and Drug Administration and the State of Colorado. PreviousarticleNextarticle Advertisement FiguresReferencesRelatedDetails Metrics September 2021Volume 174, Issue 9Page: CG1 ePublished: 21 September 2021 Issue Published: September 2021 CopyrightCopyright © 2021 by American College of Physicians. All Rights Reserved.Loading ...