Baseline characteristics of study participants*.
| Characteristics | All Patients, n = 84 | EX + EP Knee OA, n = 41 | Hip OA, n = 43 | All Patients, n = 81 | EP Knee OA, n = 40 | Hip OA, n = 41 |
|---|---|---|---|---|---|---|
| Female sex, no. | 47 | 25 | 22 | 45 | 24 | 21 |
| Age, yrs | 67.9 ± 8.6 | 67.1 ± 8.8 | 68.7 ± 8.4 | 66.9 ± 8.3 | 65.1 ± 9.0 | 68.6 ± 7.1 |
| BMI, kg/m2 | 29.6 ± 4.5 | 30.8 ± 4.9 | 28.5 ± 3.9 | 31.1 ± 6.1 | 33.4 ± 5.8 | 28.8 ± 5.5 |
| Patient-reported | ||||||
| KOOS/HOOS ADL | 50.6 ± 15.3 | 53.3 ± 15.2 | 48.0 ± 15.0 | 45.6 ± 16.9 | 43.9 ± 13.8 | 47.3 ± 19.4 |
| KOOS/HOOS Pain | 46.8 ± 14.3 | 47.8 ± 14.9 | 45.8 ± 13.9 | 42.7 ± 14.4 | 39.7 ± 12.6 | 45.6 ± 15.6 |
| KOOS/HOOS Symptoms | 49.4 ± 14.3 | 57.8 ± 20.9 | 41.4 ± 14.6 | 44.6 ± 18.6 | 49.3 ± 19.0 | 40.0 ± 17.4 |
| KOOS/HOOS Sport and Recreation | 24.6 ± 17.2 | 20.0 ± 18.4 | 29.0 ± 14.8 | 19.8 ± 18.1 | 10.7 ± 15.0 | 28.5 ± 16.7 |
| KOOS/HOOS Quality of Life | 31.2 ± 12.1 | 30.9 ± 13.1 | 31.5 ± 11.2 | 28.9 ± 15.9 | 27.1 ± 16.8 | 30.6 ± 15.1 |
| Functional performance | ||||||
| Chair stands, s | 13.3 ± 5.4 | 13.5 ± 5.9 | 13.1 ± 5.1 | 13.9 ± 4.4 | 14.4 ± 4.3 | 13.4 ± 4.5 |
| 20-m walk, self-chosen pace, s | 18.6 ± 5.5 | 18.8 ± 5.9 | 18.4 ± 5.2 | 19.9 ± 6.0 | 20.3 ± 6.1 | 19.5 ± 6.0 |
| 20-m walk, maximal pace, s | 15.0 ± 4.8 | 14.8 ± 4.4 | 15.2 ± 5.3 | 16.3 ± 5.4 | 17.0 ± 6.1 | 15.6 ± 4.7 |
| Knee bends, no. §, Index | 15.5 (6;23.5) | 11 (1;18) | 19 (10;28) | 14 (2;23) | 2.5 (0;10) | 20 (15;26) |
| Knee bends, no. §, Contra | 20 (12.5;26.5) | 16 (8;24) | 22 (16;28) | 19 (12;26) | 15 (10;20) | 24 (16;28) |
| Muscle power | ||||||
| Single-joint knee extension, W§ Index | 38.5 (18.2;68) | 34.5 (12;51.3) | 41.2 (21.3;74.4) | 32.6 (17.5;62) | 35.5 (16.5;57.2) | 32.2 (18.1;71) |
| Contra | 53.2 (30;84.6) | 46.7 (23.6;72.5) | 56.8 (38.3;94.6) | 48.3 (30.6;90.4) | 43.4 (27.8;87.6) | 58.3 (33.6;90.7) |
| Single-joint hip extension, W § Index | 30 (15.5;49.4) | 33.9 (17.2;55.9) | 22.2 (15.3;38) | 32.3 (19.6;52.3) | 36.1 (25.2;61.9) | 30.3 (16.2;45.3) |
| Contra | 33.7 (18;56.4) | 37.5 (14.7;54.9) | 31.1 (18.4;57.3) | 33.8 (18;51.4) | 34 (19.8;64.8) | 32.9 (15.9;48.7) |
| Single joint hip abduction, W§ Index | 18.8 (12;27.9) | 24.2 (13.2;39.9) | 14.2 (7.8;22.2) | 18.9 (12.4;33.4) | 26.3 (17.7;46.7) | 15 (10.1;21) |
| Contra | 23.8 (14.2;34.1) | 22.3 (13.1;35.1) | 23.8 (16;30.7) | 22.1 (13;38.3) | 27.1 (17.3;41.8) | 20 (11;28.5) |
| Multijoint leg extension, W § Index | 72 (46;102) | 67 (46;87) | 74.5 (48;108) | 70 (46;119) | 69 (43;114) | 73 (51.5;130) |
| Contra | 86 (69;121) | 82 (67;117) | 92.5 (73;124) | 95 (62;149) | 88.5 (62;133.5) | 107 (65;150) |
EX + EP: 8 weeks exercise intervention plus educational package; EP: educational package alone.
↵* Continuous variables are expressed as the mean ± SD; noncontinuous variables are expressed as the number of patients.
↵§ Data showed a non-gaussian distribution, thus they are presented as median and interquartile range. OA: osteoarthritis; KOOS: Injury and Osteoarthritis Outcome Score; HOOS: Hip Disability and Osteoarthritis Outcome Score (scores range from 0 to 100 with higher scores indicating fewer problems); Index: leg to undergo surgery; Contra: contralateral leg; ADL: Activities of Daily Living.