Table 1 Baseline characteristic of participates
Characteristic | Follow-up | Non-follow-up | P value |
|---|---|---|---|
Total (%) | 598 (74.5%) | 205 (25.5%) | Â |
Baseline socio-demographic, BMI, and history of knee injury | |||
 Age | 59.18 ± 6.57 | 61.48 ± 8.52 | <0.01 |
 BMI | 25.96 ± 3.43 | 26.00 ± 3.98 | 0.283 |
 Gender (%) |  |  |  |
  Male | 217 (36.3%) | 98 (47.8%) | <0.01 |
  Female | 381 (63.7%) | 107 (52.2%) |  |
 Education (%) |  |  |  |
  Primary school | 136 (22.7%) | 44 (21.5%) | 0.705 |
  Middle school or above | 462 (77.3%) | 161 (78.5%) |  |
 Injury (%) |  |  |  |
  Yes | 30 (5%) | 10 (4.9%) | 0.937 |
  No | 568 (95%) | 195 (95.1%) |  |
Baseline physical function of the knee | |||
 Range of motion in knee level | 129.67 ± 6.60 | 129.70 ± 7.44 | 0.945 |
 Flexion contracture in knee level | 1.23 ± 2.21 | 1.25 ± 2.24 | 0.898 |
 50-foot walk test | 12.68 ± 2.62 | 13.48 ± 4.61 | 0.02 |
 Chair stand test | 8.45 ± 2.19 | 8.87 ± 3.61 | 0.115 |
Baseline knee condition | |||
 Baseline K/L grade in knee level (%) |  |  |  |
  0 | 776 (64.9%) | 248 (60.5%) | 0.11 |
  1 | 420 (35.1%) | 162 (39.5%) |  |
 Baseline knee pain (%) |  |  |  |
  No pain | 513 (85.8%) | 185 (90.7%) | 0.188 |
  One knee pain | 53 (8.9%) | 11 (5.4%) |  |
  Both knee pain | 32 (5.4%) | 8 (3.9%) |  |