Table 1

Characteristics of the study population (n = 294)
Characteristic Value Missing (%)
Demographics
 Age (years), mean ± SD 61.1 ± 7.4
 Female, n (%) 188 (63.9)
 Marital status, n (%) 15 (5.1)
  Single/living alone 54 (19.4)
  Married/living together 225 (80.6)
 Education level, n (%) 10 (3.4)
  Primary school 12 (4.2)
  Secondary school 173 (60.9)
  Higher professional education/university 99 (34.9)
Clinical factors
 Duration of symptoms, n (%) 18 (6.1)
  0–1 year 31 (11.2)
  1–5 years 90 (32.6)
  > 5 years 155 (56.2)
 KL-grade < 2, n (%) 80 (27.9) 7 (2.4)
 KL-grade ≥ 2 , n (%) 207 (72.1)
  right knee 28 (9.8)
  left knee 35 (12.2)
  both knees 144 (50.2)
 Comorbidity, CIRS total score (range: 0–52), median (IQR) 2 (1–4) 2 (0.7)
Independent variables
 BMI, kg/m2, mean ± SD 29.2 ± 5.5
 HADS depression score (range: 0–21), median (IQR) 3 (1–6)
Dependent variables
 NRS knee pain last week(range: 0-10), mean ± SD 5.0 ± 2.2 4 (1.4)
 WOMAC physical function score (range: 0–68), mean ± SD 25.1 ± 13.1 4 (1.4)
 Get up and go test (sec.), mean ± SD 11.2 ± 5.0 1 (0.3)

SD, Standard deviation. IQR, Interquartile range. KL-grade, Kellgren and Lawrence grade. CIRS, Cumulative Illness Rating Scale. BMI, Body-mass index. HADS, Hospital Anxiety and Depression Scale. NRS, Numeric rating scale. WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index.

Holla et al.

Holla et al. BMC Musculoskeletal Disorders 2013 14:296   doi:10.1186/1471-2474-14-296

Open Data