Table 1.
Characteristics of included patients with hip or knee OA
| Characteristics | Patients (n=174) |
|---|---|
| Age in years (mean, SD) | 64 (7.7) |
| Female, n (%) | 125 (72) |
| BMI, n (%) | |
| <25 | 36 (21) |
| ≥25 <30 | 84 (48) |
| ≥30 | 46 (26) |
| Missing | 8 (5) |
| Knee OA, n (%) | 94 (54) |
| Joint replacement (THA or TKA), n (%) | |
| Yes | 169 (97) |
| Within 3 months | 5 (3) |
| First joint replacement, n (%) | 132 (73) |
| Duration of complaints of affected hip/ knee, n (%) | |
| <1 year | 13 (8) |
| 1–5 years | 86 (49) |
| 6–10 years | 42 (24) |
| 11–20 years | 25 (14) |
| >20 years | 8 (5) |
| Pain before surgery, mean (SD)* | 7.16 (1.8) |
| Comorbidities, n (%) | |
| Diabetes | 10 (6) |
| Stroke, cerebral haemorrhage, cerebral infarct | 5 (3) |
| Cancer | 10 (6) |
| Cardiovascular disease | 12 (7) |
| Migraine or severe headaches | 17 (10) |
| High blood pressure | 57 (33) |
| Asthma, chronic bronchitis, emphysema | 14 (8) |
| Chronic joint inflammation | 32 (18) |
| Other | 20 (11) |
| Education, n (%) | |
| Basic | 6 (3) |
| Intermediate | 120 (69) |
| High | 47 (27) |
| Missing | 1 (1) |
| Paid work, yes n (%) | 55 (32) |
| Region of residence, n (%) | |
| North | 70 (40) |
| Middle | 55 (32) |
| South | 49 (28) |
| Living situation, n (%) | |
| Live alone | 39 (22) |
| Live with others | 135 (78) |
| Type of insurance, n (%) | |
| Basic only | 4 (2) |
| Basic with additional coverage | 170 (98) |
*Average pain during 6 months before surgery measured on a 0 (no pain)-10 (unbearable pain) scale.
BMI, body mass index; OA, osteoarthritis; THA, total hip arthroplasty; TKA, total knee arthroplasty.