HAKA: Routine Follow-Up at 1 Year After Hip- or Knee Arthroplasty: Wasting Resources or Appropriate Healthcare?

Patient-reported physical functioning will be assessed using the PROMIS® Physical Function Version 1.0, Short Form 10a. The short form consists of 10 items and is expressed by raw summed score ranging from 10 to 50, which can be converted to a T-score and SE. The T-score is a standardized score with a mean of 50 and a SD of 10. Higher T-scores indicate better physical functioning.

Assesses healthcare consumption based on the number of postoperative outpatient clinical visits and X-ray assessments.

The total number of post-operative complications per patient will be recorded.

Complication types will be recorded and categorized (e.g., infection, periprosthetic fracture, loosening, malalignment, dislocation, prosthetic wear).

The total number of surgical re-interventions per patient related to the index procedure will be recorded.

Types of surgical re-interventions will be recorded and categorized (e.g., DAIR, partial component exchange, full revision, irrigation and debridement without component retention).

Includes costs from electronic health records and additional patient questionnaires, covering hospital and non-hospital care.

Patient-reported pain intensity, measured using a numeric scale ranging from 0 to 10, where 0 indicates no pain and 10 indicates the worst imaginable pain. Higher scores reflect more severe pain.

Health-related quality of life is measured using the EQ-5D-5L questionnaire. The EQ-5D-5L index score ranges from -0.594 to 1.000, where 1.000 indicates full health, 0 represents death, and negative values represent health states worse than death. Higher scores indicate better health status.