The full report is titled “Sunscreen and Prevention of Skin Aging. A Randomized Trial.” It is in the 4 June 2013 issue of Annals of Internal Medicine (volume 158, pages 781-790). The authors are M.C.B. Hughes, G.M. Williams, P. Baker, and A.C. Green.
The In the Clinic® slide sets are owned and copyrighted by the American College of Physicians (ACP). All text, graphics, trademarks, and other intellectual property incorporated into the slide sets remain the sole and exclusive property of the ACP. The slide sets may be used only by the person who downloads or purchases them and only for the purpose of presenting them during not-for-profit educational activities. Users may incorporate the entire slide set or selected individual slides into their own teaching presentations but may not alter the content of the slides in any way or remove the ACP copyright notice. Users may make print copies for use as hand-outs for the audience the user is personally addressing but may not otherwise reproduce or distribute the slides by any means or media, including but not limited to sending them as e-mail attachments, posting them on Internet or Intranet sites, publishing them in meeting proceedings, or making them available for sale or distribution in any unauthorized form, without the express written permission of the ACP. Unauthorized use of the In the Clinic slide sets will constitute copyright infringement.
University of British Columbia
June 19, 2017
Adjusted for differences?
The authors seem to have failed to study, report, or adjust for differences in sun exposure in the two groups, negating their finding that skin differences were attributable to sunscreen use. As a board-certified MD specializing in preventive medicine, I believe that sunscreen-using patients could very likely have also chosen to reduce their UV exposure risk in other ways, including hat wearing and spending less time directly in sunlight -- when one sensitizes patients to the importance of acting to minimize UV exposure, patients will, quite appropriately, respond in more ways than merely applying sunscreen.
Sunscreen and Prevention of Skin Aging. Ann Intern Med. 2013;158:I–28. doi: https://doi.org/10.7326/0003-4819-158-11-201306040-00001
Download citation file:
Published: Ann Intern Med. 2013;158(11):I-28.
Results provided by:
Copyright © 2019 American College of Physicians. All Rights Reserved.
Print ISSN: 0003-4819 | Online ISSN: 1539-3704
Conditions of Use