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In the Original Investigation titled “Association of Extracapsular Spread With Survival According to Human Papillomavirus Status in Oropharynx Squamous Cell Carcinoma and Carcinoma of Unknown Primary Site,” published in the July 2106 issue of JAMA Otolaryngology–Head & Neck Surgery,1 Figures 1 through 4 were missing the number of patients at risk for the Kaplan-Meier curves. The numbers at risk have now been added. This article was corrected online.
Additional Data for Figures. JAMA Otolaryngol Head Neck Surg. 2017;143(4):430. doi:10.1001/jamaoto.2017.0089