Table 1.

Participants’ baseline characteristics

CharacteristicTotal 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, %81890.19
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 0/158/4260/400.92
TKA after 5 years’ follow-up14
  • 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.