Table 1 Demographic and clinical characteristics of study participants, mapped to the International Classification of Functioning, Disability and Health (ICF) framework
|  | OA participants (n = 2270)a | Non-OA participants (n = 2526) | ||
|---|---|---|---|---|
Fall and fracture outcomes | ||||
Self-reported fallers, n (%) | 1627 | 72 | 1596 | 63 |
Self-reported history of fracture, n (%) | 382 | 17 | 359 | 14 |
Personal factors | ||||
Age, mean (SD) | 62.0 | 8.9 | 60.4 | 9.4 |
Female, n (%) | 1405 | 62 | 1399 | 55 |
Number of co-morbid conditions, n (%) | ||||
None | 1171 | 73 | 1489 | 79 |
One or more | 445 | 28 | 406 | 21 |
Depression, mean (SD) | 7.3 | 7.5 | 6.0 | 6.5 |
Opioid use, n (%) | 218 | 10 | 36 | 1 |
Bisphosphonate use, n (%) | 291 | 13 | 285 | 11 |
Previous history of falls, n (%) | 933 | 41 | 774 | 31 |
Environmental factors | ||||
Married, n (%) | 1466 | 65 | 1712 | 68 |
Lived alone, n (%) | 515 | 23 | 540 | 21 |
Impairments in body function and structures (OA impairments) | ||||
KOOS pain scale, mean (SD) | 72.0 | 20.3 | 84.1 | 16.4 |
WOMAC stiffness scale, mean (SD) | 2.5 | 1.8 | 1.5 | 1.5 |
Flexor strength (N/kg), mean (SD) | 1.8 | 0.8 | 2.0 | 0.2 |
Extensor strength (N/kg), mean (SD) | 4.4 | 1.5 | 4.8 | 1.5 |
Activity limitations | ||||
WOMAC physical function scale, mean (SD) | 14.6 | 13.2 | 7.4 | 9.9 |
Chair stands (stands/seconds, mean (SD) | 0.5 | 0.1 | 0.5 | 0.2 |
20 m walk test (m/seconds), mean (SD) | 1.3 | 0.2 | 1.3 | 0.2 |
400 m walk test (seconds), mean (SD) | 313.9 | 60.6 | 300.8 | 53.5 |
Participation restrictions | ||||
Employed, n (%) | 1326 | 58 | 1671 | 66 |
Physical activity (PASE), mean (SD) | 155.9 | 82.8 | 165.3 | 82.0 |
KOOS sport and recreation scale, mean (SD) | 63.8 | 27.1 | 79.4 | 22.7 |