Table 2.

Characteristics of included hearing loss and tinnitus instruments.

Name of instrument	Number of questions	Number of levels	Number of domains	Instrument description
Hearing Measurement Scale (Einar-Jon et al., 2011; Einarsson et al., 2011)	44	5	7	Items rated always to never; questions weighted based upon importance; summary scores are HMS total, HMS disability, and HMS handicap
Health Utilities Index (Barr et al., 2000; Fu et al., 2006; Kennedy et al., 2014)	5	2	1	Algorithm-converted responses to questions to attribute levels for HUI2 and HUI3 that were then used to generate single-attribute utility scores; no tinnitus domain
Tinnitus Questionnaire for Auditory Brainstem Implant (Soussi & Otto, 1994)	19	Variable	1	Does not return an overall score

Note. HMS = Hearing Measurement Scale; HUI = Health Utilities Index.