SKAR | Baseline | Follow-up 1 year | |
Variable category | Variable | ||
Surgery-related variables | |||
Diagnosis (at knee) | ICD-10 | x | |
Laterality | x | ||
Date | Date of surgery | x | |
Type of surgery | Primary, revision | x | |
Type of replacement | Total, unicompartmental, stabilised (hinged) knee replacement | x | |
Patient’s status | Age, sex, height, weight, ASA class | x | |
Implant characteristics | Article number, type of implant | x | |
Technique | Incision, fixation | x | |
Patient-reported measures | |||
Musculoskeletal comorbidity | Charnley class (modified)* | x | x |
x | x | ||
Generic | EQ-5D | x | x |
Satisfaction | Satisfaction with treatment (VAS) | x | |
Disease specific | KOOS, knee pain (VAS) | x | x |
*Charnley class: classifications of musculoskeletal impairment. Class A: unilateral knee disease; class B1: bilateral OA, one knee is scheduled for or already received arthroplasty surgery while the other knee has OA but no scheduled arthroplasty surgery; B2: bilateral OA, one knee is scheduled for or already received arthroplasty surgery while the other knee has already received knee arthroplasty surgery and class C: multiple joint disease or some other condition that inhibits the patient’s ability to walk.
ASA, American Society of Anesthesiologists; ICD-10, International Classification of Diseases, tenth revision; KOOS, Knee injury and Osteoarthritis Outcome Score; VAS, visual analogue scale.