The effect of Transcranial Direct Current Stimulation in addition to Tinnitus Retraining Therapy for treatment of chronic tinnitus patients: a study protocol for a double-blind controlled randomised trial

Table 2 Timing of outcome measurements

		T₀	T₁	T₂
Primary outcome measurements	TFI	x	x	x
Secondary outcome measurements	VAS	x	x	x
	HQ	x	x	x
	DS14	x
	PGIC			x
	Tone audiometry	x		x
	Psychoacoustic measurements	x		x
	ERP	x		x

DS14 14-item questionnaire assessing for type D-personality, HQ Hyperacusis Questionnaire, ERP Event-related Potential, PGIC Patient Global Impression of Change, TFI Tinnitus Functional Index, VAS Visual Analogue Scale

ISSN: 1745-6215