Table 2 Measurements assessed in DSL patients and their communication partners at baseline and 3-month follow-up

DSL patients

Primary outcome measures

Hearing aid fitting, hearing aid use and satisfaction

X

X

Difficulties with hearing aid use and maintenance

X

X

Change in hearing aid use (IOI-HA) [65, 66]

X

Change from communication strategies (IOI-AI) [67]

X_i

Communication (CPHI-communication strategies) [68]

X

X

Secondary outcomes

Health (subjective health)

X

X

Health related quality of life (EuroQol-5 Dimensions (EQ-5D)) [69]

X

X

Coping with hearing impairment (CPHI-personal adjustment) [68]

X

X

Vision-related quality of life (LVQOL) [70, 71]

X

X

Loneliness (Loneliness scale) [72, 73]

X

X

Fatigue (FAS) [74]

X

X

Participation (parts of D-AI-interpersonal interactions and relationships) [75]

X

X

Autonomy (PAQ) [76]

X

X

Evaluation of intervention

X_i

Covariates

Patient characteristics (e.g. age, gender, education, living arrangement)

X

Disability characteristics (eye condition, VA, self-perceived vision (VFQ25-general vision subscale [77]), hearing condition, hearing loss (speech-reception-threshold in noise))

X

Cognition (6-item screener MMSE) [78]

X

Depressive symptoms (CES-D) [79]

X

X

Major life events between baseline and follow-up

X

Communication partners

Primary outcomes

Coping with hearing loss (HHDI ‘reactions of others’ scale) [80]

X

X

Change from hearing aid use (IOI-HA-SO) [67]

X

Change from communication strategies (IOI-AI-SO) [67]

X_i

Quality of life (CarerQoL) [81]

X

X

Evaluation of intervention

X_i

Secondary outcomes

Chronic fatigue (FAS) [74]

X

X

Depression (CES-D) [79]

X

X

Health (subjective health, EQ-5D) [69]

X

X

Covariates

Demographic characteristics (e.g. age, gender)

X

Relationship with patient (sort and quality of relation)

X

X

Self-efficacy (G-SES) [82]

X

X

Costs

Healthcare use (iMCQ) [83]

X

X

Intervention costs (occupational therapists, travel costs, time communication partner)

X_i

Costs informal care (SF-HLQ, time spent on care for communication partner)

X

X

Proxy: Travel time and expenses

X

Proxy: Time spent on care giving for communication partner

X

X