Table 2 Target criteria, assessment instruments, and measurement time points
Target criteria | Assessment instruments | Measurement time points | |||||
|---|---|---|---|---|---|---|---|
t0 | t1 | t2 | t3 | t4 | t5 | ||
Primary outcome | |||||||
Joint functioning | Patients with hip replacement: Hip Osteoarthritis Outcome Score (HOOS [22];) | X | X | X | X | X | X |
Patients with knee replacement: Knee injury and Osteoarthritis Outcome Score (KOOS [23];) | X | X | X | X | X | X | |
Secondary outcomes | |||||||
Pain | Visual analog scale (VAS) | X | X | X | X | X | X |
Depression and anxiety | Depression, anxiety and stress scale (DASS [24];) | X | X | X | X | X | X |
Physiological, mental, and social health | Patient-Reported Outcomes Measurement Information System (PROMIS®-29 [25];) | X | X | X | X | X | X |
Patients’ expectations | Credibility/expectancy questionnaire (adapted from [26]) | X | X | X | X | X | X |
Patient satisfaction | Patients’ Experience Questionnaire (PEQ [27];) | X | X | ||||
Dispositional optimism and pessimism | Life-Orientation-Test (LOT-R [28];) | X | X | X | X | ||
Risk of falling | Self-constructed questionnaire | X | X | X | X | ||
Post-operative complications | Self-constructed questionnaire | X | X | X | X | X | |
Knowledge about the disease (patients’ health literacy) | Self-constructed questionnaire | X | X | ||||
Knowledge about postoperative behavior (patients’ health literacy) | Self-constructed questionnaire | X | X | ||||
Perceived knowledge of the patient about the disease (Physician questionnaire) | Self-constructed questionnaire | X | |||||
Sociodemographic variables | ICHOM standard set for hip- and knee osteoarthritis (International Consortium for Health Outcomes Measurement) | X | |||||