Table 1.
Baseline characteristics in knee and hip patients attending GLA:D
| Knee | Hip | |
| (n: 12 162) | (n: 4093) | |
| Age (years), mean (SD) | 64.1 (9.8) | 65.7 (9.4) |
| Gender (female), % (n) | 73.1 (8887) | 73.6 (3014) |
| BMI (kg/m2), mean (SD) | 28.6 (5.3) | 26.9 (4.6) |
| Marital status, % (n) | ||
| Married or living with others | 72.4 (8803) | 70.7 (1079) |
| Single | 27.6 (3359) | 29.3 (1200) |
| Ethnic background, % (n) | ||
| Danish | 96.2 (11 701) | 96.8 (3961) |
| Other western | 2.5 (299) | 2.6 (106) |
| Not western | 1.3 (160) | 0.6 (25) |
| Educational level, % (n) | ||
| Primary | 18.7 (2277) | 19.7 (1493) |
| Secondary | 3.0 (367) | 2.7 (112) |
| Vocational | 39.1 (4761) | 36.2 (1481) |
| Short-term | 4.6 (558) | 4.5 (185) |
| Bachelor | 26.2 (3186) | 28.0 (1145) |
| Long-term | 7.2 (873) | 8.0 (329) |
| Unknown | 1.2 (140) | 0.9 (35) |
| Social status, % (n) | ||
| Employed | 43.3 (5264) | 36.5 (1493) |
| Unemployed | 2.1 (256) | 1.5 (61) |
| Sick pay (public funded) | 0.7 (86) | 0.4 (15) |
| Disability pension | 3.7 (444) | 3.7 (152) |
| Early retirement | 6.3 (766) | 7.3 (297) |
| Age pension | 42.8 (5209) | 49.5 (2028) |
| Other | 1.1 (137) | 1.1 (47) |
| Administrative region, % (n) | ||
| Capital Region | 27.7 (3367) | 27.6 (1131) |
| Region Zealand | 13.0 (1578) | 13.1 (535) |
| Region of Southern Denmark | 21.8 (2654) | 25.2 (1030) |
| Central Denmark Region | 25.4 (3085) | 24.9 (1021) |
| North Denmark Region | 12.2 (1478) | 9.2 (376) |
| Number of comorbidities*, % (n) | ||
| 0 | 38.2 (4367) | 39.7 (1533) |
| 1 | 35.7 (4076) | 35.1 (1358) |
| 2 | 17.3 (1979) | 16.8 (649) |
| 3 or more | 8.8 (1.006) | 8.4 (326) |
| Symptom duration (months), median (IQR) | 24 (7–60) | 24 (8–48) |
| Pain intensity (VAS 0–100, best to worst), mean (SD) | 48.6 (22.0) | 47.6 (21.7) |
| Bilateral symptoms, % (n) | 46.3 (5614) | 26.1 (1064) |
| Walk speed† (m/s), mean (SD) | 1.49 (0.33) | 1.49 (0.34) |
| Previous surgery in worst joint‡, % (n) | 30.7 (3725) | 4.0 (161) |
| Use of pain medication§ (yes), % (n) | ||
| Overall | 61.3 (7431) | 64.2 (2629) |
| Paracetamol | 49.9 (6073) | 53.3 (2184) |
| NSAIDs | 35.6 (4325) | 34.6 (1419) |
| Opioids | 7.1 (868) | 9.0 (367) |
| KOOS/HOOS QOL¶ (0–100, best to worst), mean (SD) | 45.2 (14.7) | 47.4 (15.1) |
Missing values: BMI n: 5 (knee), n: 7 (hip); number of comorbidities n: 711 (knee), n: 215 (hip); symptom duration (mainly missing due to technical problems): n: 3.157 (knee), n: 1096 (hip); pain intensity: n: 23 (knee), n: 9 (hip); bilateral symptoms: n: 32 (knee), n: 20 (hip); walk speed: n: 610 (knee), n: 221 (hip); KOOS/HOOS QOL: n: 36 (knee), n: 21 (hip).
*Number of comorbidities calculated from self-report of the following conditions: hypertension, cardiovascular diseases, lung diseases, diabetes, stomach diseases, liver or kidney diseases, blood diseases, cancer, depression, rheumatoid arthritis, neurological disorders, other medical diseases.
†Walking speed was assessed with the 40 m fast-paces walk test under instruction of the GLA:D therapist.
‡Self-reported previous surgery in worst joint.
§Self-reported use of pain medication during last 3 months.
¶KOOS or HOOS Quality of Life sub-scale score.
BMI, body mass index; GLA:D, Good Life with osteoArthritis in Denmark; HOOS, Hip disability and Osteoarthritis Outcome Score; KOOS, Knee injury and Osteoarthritis Outcome Score; NSAIDs, Non-Steoridal Anti-Inflammatory Drugs; QOL, quality of life; VAS, visual analogue scale.