Chinese version of the Tinnitus Functional Index (TFI-CH)
The TFI-CH is a 25-item questionnaire regarding the severity and negative impact of tinnitus across eight domains: intrusiveness, sense of control, cognitive complaints, sleep disturbance, auditory difficulties, relaxation, quality of life and emotional distress. During administration of the THI-CH, the patient is asked to respond to each item by marking on Likert scale from 0 (least) to 10 (worst). The TFI-CH characterizes levels of tinnitus distress, with the total score ranging from 0 to 100, with higher scores indicating greater tinnitus severity. Response to treatment was considered to be a reduction of at least 13 points in the TFI-CH total score.2