Table 1.
Quadriceps strength deficit in subjects with knee osteoarthritis compared with healthy controls.
| Number (% Women) | ||||
|---|---|---|---|---|
| Reference | Osteoarthritis | Control | Test Mode | Difference (%)a |
| Pap46 | 222 (60) | 85 (64) | Isometric, 90° knee flexion | 42 |
| Palmieri-Smith45 | 188 (100) | 160 (100) | Isometric, 90° knee flexion | 22 |
| Hortobágyi23 | 20 (75) | 20 (75) | Isometric, 65° knee flexion | 56 |
| Isokinetic concentric, 90°,180°/s | 56 | |||
| Isokinetic eccentric, 90°,180°/s | 76 | |||
| Gapeyeva18 | 10 (100) | 10 (100) | Isometric, 90° knee flexion | 48 |
| Liikavainio33 | 54 (0) | 53 (0) | Isometric, 70° knee flexion | 20 |
| Hurley26 | 103 (63) | 25 (72) | Isometric, 90° knee flexion | 30 |
| Cheing9 | 66 (86) | 10 (50) | Isometric, 30° knee flexion | 10 |
| Isometric, 60° knee flexion | 27 | |||
| Isometric, 90° knee flexion | 25 | |||
| Heiden20 | 54 (55) | 27(67) | Isometric, 90° knee flexion | 23 |
| Tan68 | 60 (100) | 30 (100) | Isometric, 30° knee flexion | 19 |
| Isometric, 60° knee flexion | 19 | |||
| Isokinetic concentric, 60°/s | 27 | |||
| Isokinetic concentric, 180°/s | 23 | |||
| Diracoglu11 | 51 (100) | 43 (100) | Isokinetic concentric, 60°/s | 20 |
| Isokinetic concentric, 180°/s | 19 | |||
| Isokinetic concentric, 240°/s | 11 | |||
| Messier37 | 15 (73) | 15 (73) | Isokinetic concentric, 60°/s | 28 |
| Thomas69 | 22 (100) | 13 (100) | Isometric, 90° knee flexion | 11 |
| Berth5 | 50 (64) | 23 (65) | Isometric, 90° knee flexion | 37 |
| Jan28 | 55 (100) | 33 (100) | Isometric, 60° knee flexion | 32 |
| Isokinetic concentric, 30°/s | 37 | |||
| Isokinetic concentric, 180°/s | 39 | |||
| Fisher15 | 90(50) | 104 (60) | Isometric, 90° knee flexion | 54 |
| Lewek32 | 12 (42) | 12 (50) | Isometric, 90° knee flexion | 24 |
| Hall19 | 21 (81) | 21 (81) | Isometric, 60° knee flexion | 20 |
| Slemenda63 | 112 (56) | 294b (48) | Isokinetic concentric, 60°/s | 16 |
| Rice51 | 15 (53) | 15 (53) | Isometric, 90° knee flexion | 32 |
| Emrani12 | 20 (NR) | 20 (NR) | Isokinetic concentric, 90°/s | 31 |
| Isokinetic concentric, 150°/s | 31 | |||
a
Difference = (mean value of control group – mean value of osteoarthritis group) / mean value of control group.
b
No radiographic evidence of osteoarthritis and no pain.