Table 1.
Characteristics of the participants in each group.
| 808 nm group (N = 16) | 660 nm group (N = 15) | Sham control group (N = 16) | p-value | |
|---|---|---|---|---|
| Gender | 1 M 15FM | 3 M 12FM | 5 M 11FM | |
| Age (years) | 67.44 (6.54) | 67.68 (7.81) | 71.63 (7.60) | 0.181 |
| Height (cm) | 157.13 (5.71) | 159.69 (6.36) | 156.19 (6.53) | 0.293 |
| Weight (kg) | 57.50 (9.51) | 61.56 (8.00) | 62.38 (8.66) | 0.271 |
| Bilateral knee OA | 12/16 | 14/15 | 11/16 | |
| K-L grade | II: 8 | II: 10 | II: 7 | |
| II + : 1 | II + : 2 | II + : 3 | ||
| III: 7 | III: 3 | III: 6 | ||
| Muscle strength | ||||
| Knee extensor (%improve) | 24.62 (9.09) | 29.95 (10.46) | 26.49 (7.85) | 0.272 |
| Knee flexor (%improve) | 15.54 (5.85) | 17.15 (5.75) | 15.72 (4.81) | 0.676 |
| Functional outcomes | ||||
| 30-s chair stand (time/30-s) | 17.08 (4.00) | 16.69 (4.30) | 17.19 (5.40) | 0.951 |
| 40 m fast-paced walk (sec) | 30.45 (3.14) | 32.45 (7.35) | 31.81 (5.85) | 0.600 |
| Time up-and-go (sec) | 7.06 (1.53) | 7.20 (1.71) | 7.25 (1.43) | 0.940 |
| A stair climb (sec) | 15.38 (3.08) | 16.57 (5.89) | 15.23 (3.62) | 0.648 |