In the Original Investigation titled “The World Health Organization Adult Attention-Deficit/Hyperactivity Disorder Self-Report Screening Scale for DSM-5,”1 published online April 5, 2017, and in the May print issue of JAMA Psychiatry, there were errors in the footnote to Table 1 and in a corresponding section of Results. In Table 1 footnote a, the phrase “the highest scores are 5 for questions 1 and 2” should have read “the highest scores are 6 for question 3, 5 for questions 1 and 2,” and the range given as “the range 0 of 24” should have been “in the range of 0 to 25.” The corresponding 2 mentions in the Results of “0 to 24” should have been “0 to 25.” This article was also corrected on October 25, 2017, to fix an error in Results.2 This article was corrected online.