Table 1.

Sociodemographic and disease-related characteristics of study sample (n = 161). Values are given as mean (SD) unless indicated otherwise. The mean scores of the KOOS-PS, LEFS, LAI, and WOMAC-PF are presented using the usual score range and using a normalized score (0–100).

CharacteristicsBaseline3 Months
Female, n (%)99 (62)
Age, yrs59 (9)
BMI, kg/m229.7 (5)
Duration of symptoms, n (%)
  > 5 yrs59 (37)
Localization of symptoms, n (%)
  Left knee39 (24)
  Right knee56 (35)
  Both sides66 (41)
Patients considering their state to be acceptable, n (%)77 (49)87 (56)
PROM regarding physical function
KOOS-PS
  Range 0–2818.3 (5.2)17.8 (5.3)
  Range 0–10053.6 (16.8)51.7 (15.8)
LAI
  Range 0–2411.0 (4.0)10.9 (4.3)
  Range 0–10045.8 (16.7)45.4 (18.1)
LEFS*
  Range 0–8040.6 (14.1)41.0 (15.3)
  Range 0–10049.2 (17.6)48.8 (19.1)
WOMAC-PF
  Range 0–6832.8 (13.2)32.0 (13.2)
  Range 0–10048.2 (19.4)47.0 (20.5)
Other PROM
  NRS function (range 0–10)5.5 (2.4)5.4 (2.5)
  NRS pain (range 0–10)5.6 (2.1)5.5 (2.2)
  NRS PtGA (range 0–10)5.6 (2.6)5.5 (2.2)
Depression (HADS; range 0–21)
  No depressive feelings4.6 (3.0)3.6 (1.9)
  Depressive feelings8.5 (3.9)10.3 (2.9)
  • * For all PROM except LEFS, higher scores reflect a higher level of disability. BMI: body mass index; WOMAC-PF: Western Ontario and McMaster Universities Osteoarthritis Index physical function subscale; LAI: Lequesne Algofunctional Index; LEFS: Lower Extremity Functional Scale; KOOS-PS: Knee Injury and Osteoarthritis Outcome Score, short version; PROM: patient-reported outcome measure; NRS: numerical rating scale; PtGA: patient’s global assessment; HADS: Hospital Anxiety and Depression Scale.