In the Original Investigation titled “Incidence and Prognosis of Psoriasis and Psoriatic Arthritis in Patients Undergoing Bariatric Surgery,” published online December 21, 2016, and in the April 2017 issue of JAMA Surgery,1 the heading for the right-hand column of data under “Gastric Banding” in Table 2 should have been given as “Postsurgery” instead of “Presurgery.” This article was corrected online.