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Table 2 Overview of primary and secondary outcome measures

From: Conservative therapy for the treatment of patients with somatic tinnitus attributed to temporomandibular dysfunction: study protocol of a randomised controlled trial

  Baseline Follow-up Measuring tool Completed by
Primary outcome measure
 Tinnitus-related distress X X Tinnitus Questionnaire Patient
Secondary outcome measure
 TMJ pain X X TMD pain screener Patient
 Myalgia X X DC/TMD Researcher
 Arthralgia X X DC/ TMD Researcher
 Pressure sensitivity X X Pressure algometer (Somedic), kPa Researcher
 Mouth opening X X Ruler, cm Researcher
 Hearing loss X   Pure Tone audiometry Speech in noise test Audiologist
 Psychoacoustic tinnitus analysis X X Type of tinnitus, tinnitus pitch and tinnitus loudness Audiologist
 Tinnitus severity X   Tinnitus Functional Index Patient
 Subjective tinnitus loudness X X Visual Analogue Scale (0–100 mm) Patient
 State of anxiety and depression X   Hospital Anxiety and Depression Scale Patient
 Hyperacusis X   Hyperacusis Questionnaire Patient
 Auditory event-related potential X X Auditory event-related potential Researcher
 General tinnitus characteristics such as duration of the complaints, localisation (unilateral, bilateral, central), somatic modulation, temporal relation with TMD, bruxism periods X   Medical history ENT
  1. DC/TMD Diagnostic criteria for temporomandibular disorders, ENT ear-nose-throat, TMD temporomandibular disorders, TMJ temporomandibular joint