Table 1.
Participants’ baseline characteristics
| Characteristic | Total population (n = 705) | Lost to follow-up (n = 38) | P-value |
|---|---|---|---|
| Mean age, years (SD) | 56.0 (5.1) | 56.0 (5.6) | 0.97 |
|
| |||
| Female, % | 81 | 89 | 0.19 |
|
| |||
| BMI (SD) | 26.5 (4.3) | 27.0 (3.3) | 0.43 |
|
| |||
| Baseline NRS in past week (SD) | 3.7 (2.1) | 3.6 (2.0) | 0.23 |
|
| |||
| WOMAC subscales score | |||
| Physical function (SD) | 24.8 (17.0) | 28.2 (20.8) | 0.25 |
|
| |||
| Kellgren–Lawrence grade | |||
| Distribution, % knees with grade 0/1 | 58/42 | 60/40 | 0.92 |
|
| |||
| TKA after 5 years’ follow-up | 14 | – | – |
BMI = body mass index. NRS = Numeric Rating Scale for pain. SD = standard deviation. TKA = total knee arthroplasty. WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index. P-values were calculated using ANOVA or Pearson’s χ2 test.