Table 1 Overview of the questionnaire package
Questionnaire | Description | Number of items | Subscales |
|---|---|---|---|
Self – care of Heart Failure Index [20] | Self-care | 22 | Self-care behavior, self-care management, self-care confidence, and symptom perception |
Minnesota Living with Heart Failure Questionnaire [21] | Health – related quality of life | 21 | Physical, socio-economic, and emotional/psychological aspects |
Brief Illness Perception Questionnaire [24] | Illness perception | 9 | Cognitive representation, emotional representation, illness comprehensibility, and perceived cause of illness |
Sexual Adjustment Scale [22] (subscale of the Psychosocial Adjustment Scale) | Sexual activity | 6 | Relationship and sexuality |
Needs for Sexual Counseling Scale in Chronic Heart Failure [23] | Sexual activity | 21 | Symptoms, medication and information, relaxation, relationship, and psychological factors |
State Trait Anxiety Inventory [26] | Anxiety | 40 | State anxiety scale (s-anxiety) and trait anxiety scale (t-anxiety) |
Beck Depression Inventory II [27] | Depression | 21 | Depression and anxiety |
Unified theory of acceptance and use of technology questionnaire [28] | User expectations and user experience | 37 | / |
Self – composed questionnaire on nutritional behavior | Nutritional behavior | 24 | Drinking behavior and eating behavior |
Self – composed questionnaire on nutritional knowledge | Nutritional knowledge | 12 (14: patients with diabetes) | Knowledge about heart failure (and diabetes) nutrition |