Table 1.
Assessment of the variables, categorised according to the dimensions of the ICF, comparison of CHECK and OAI
| CHECK | OAI | |
|---|---|---|
| Body function and structures | Physiological functions of body systems and anatomical part of the body | |
| Articular factors | Single PA view TFJ, mediolateral view TFJ, bilateral skyline view PFJ | Bilateral PA view TFJ AP view pelvis |
| AP pelvis view, faux profil view of hip | PA view dominant hand | |
| Kinesiological factors | Pain during joint motion of the hip and knee. Assisted active range of joint motion of the hip and knee (in degrees) with a goniometer |
Knee flexion pain/tenderness |
| Knee | Palpable warmth, refill test, bony tenderness, crepitus, patellofemoral grinding test | Effusion, bony tenderness, crepitus patellar tenderness, alignment, medial-lateral laxity |
| Hip | Sign of Thomas | NA |
| Hand | DIP and PIP bony enlargements | DIP bony enlargements |
| Pain | Pain scale of WOMAC | Pain scale WOMAC |
| Knee/hip pain intensity 0–10 rating scale | Knee pain 0–10 rating scale KOOS knee pain and symptoms |
|
| Stiffness | Stiffness scale WOMAC | Stiffness scale WOMAC |
| Other joint symptoms | Hip pain, stiffness Foot/toe symptoms |
Symptoms of hip, shoulder, elbow, wrist, hand/ finger, ankle, foot/toe |
| Fatigue | Vitality scale of the SF-36-item health status survey questionnaire | NA |
| Activities | Execution of a task or action by an individual | |
| Limitations in activity | Functioning scale WOMAC | Functioning scale WOMAC |
| Participation | Involvement in life situation | |
| Working status | Employment, current and past | Employment, current and past |
| Participants with paid employment were asked whether they would like to change their working environment | Work disability due to health problems | |
| Environmental and personal factors | Complete background of an individual’s life and living situation | |
| Sociodemographic characteristics | Age, sex, ethnicity, marital status, household composition | Age, sex, ethnicity, marital status, residency, income |
| Height, weight, education | Height, weight, education | |
| Utility | EuroQol | |
| Quality of life | SF-36 | SF-12, KOOS quality of life |
| Co-morbidity | List of complaints and diseases | Comorbidity index |
| Psychological factors | ||
| Pain coping | Pain coping inventory | NA |
| Fear and depression | Scale form the SF-36: emotional role—functioning | CES-D (depressive symptoms) |
| Social support | Social support scale | NA |
| Physical workload | Based on the Dutch Musculoskeletal Questionnaire | Frequent knee bending activities |
| Physical activity during leisure | Physical activity, qualitative and quantitative | KOOS sport, recreation Physical activity (PASE) Limitation of activity due to knee symptoms |
| Healthcare use | Medical consumption, to have and use aids | Medication consumption |
| Lifestyle | Tobacco, alcohol use | Tobacco, alcohol use |
| Changes in feeding habits | Dietary nutrient intake | |
AP, anteroposterior; CHECK, Cohort Hip and Cohort Knee; KOOS, Knee Outcomes in Osteoarthritis Survey; NA, not available; OAI, Osteoarthritis Initiative; PA, posterioranterior; PASE, physical activity scale for the elderly; PFJ, patellofemoral joint; SF-12, Short Form 12-item medical outcome study; SF-36, Short Form 36-item health status survey questionnaire; TFJ, tibiofemoral joint; WOMAC, Western Ontario and McMaster osteoarthritis index.