Ascertainment of patients with incident clinically significant tinnitus (sigT). ENT, ear, nose, and throat; Superscript numbers denote: 1Consists of referrals to other specialist (otorhinolaryngology, neurology, radiology, psychiatry, psychology, or counseling) with a specific referral reason including a hearing test, hearing-related problems, tinnitus, a diagnosis involving otosclerosis, Ménière’s disease, other vestibular disorders or a related procedure on the external, middle or inner ear or acoustic nerve, see Supplemental Digital Content 5 (http://links.lww.com/EANDH/A172) for specific code sets. 2Consists of referrals to audiologist, hearing aid clinic, or hearing therapist. 3Comprises a diagnosis or procedure on the external, middle or inner ear or acoustic nerve, including hearing loss, Ménière’s disease, vestibular disorders, procedures to treat otosclerosis, and fitting of a hearing aid or implantation of a hearing device, see Supplemental Digital Content 2, 3, and 4 (http://links.lww.com/EANDH/A172) for specific code sets.