Skip to main content

Advertisement

Table 3 Baseline characteristics of the study population; knee OA (N = 174), hip OA (N = 123)*

From: Vitality and the course of limitations in activities in osteoarthritis of the hip or knee

  Knee OA Hip OA
  (N = 174) (N = 123)
Age, mean (sd) 65.9 (8.3) 66.3 (8.9)
Gender, male n (%) 46 (26.4) 36 (29.3)
Duration of complaints, mean (sd) 10.8 (11.1) 7.7 (9.3)
BMI, mean (sd) 28.4 (4.3) 26.8 (3.7)
Obesity, n (%)   
• BMI > 30 31 (17.9) 40 (32.8)
• 25 < BMI≤30 95 (54.9) 60 (49.2)
• BMI≤25 47 (27.2) 22 (18.0)
No other joint complaints n(%) 20 (11.6) 14 (11.5)
Married, n(%) 106 (60.9) 89 (72.4)
Education, n (%)   
• No or lower education (≤6 years) 28 (16.2) 19 (15.4)
• Medium education (≤12 years) 121 (69.9) 84 (68.3)
• Higher education (> 12 years) 24 (13.9) 20 (16.3)
Radiological evidence knee *   
Kellgren & Lawrence grade ≥ 2; n (%) 118 (95.2) 29 (90.6)
Radiological evidence hip**   
Kellgren & Lawrence grade ≥ 2; n (%) 25 (92.6) 82 (97.6)
Limitations in activities   
WOMAC (physical functioning) mean (sd) range 0-100 62.1 (16.6) 61.9 (16.4)
Timed walking test, seconds mean (sd) 10.2 (3.7) 10.0 (2.7)
Psychological and social factors   
One person in household, n (%) 62 (35.6) 33 (26.8)
SF-36   
• Vitality, mean (sd), range 0-100 56.8 (19.2) 56.0 (19.8)
• Mental health, mean (sd), range 0-100 71.8 (18.2) 73.4 (17.4)
Pain Coping Inventory (PCI)   
• PCI pain transformation, mean (sd), range 1-4 2.3 (0.6) 2.2 (0.6)
• PCI distraction, mean (sd), range 1-4 2.3 (0.6) 2.2 (0.7)
• PCI reduction demands, mean (sd), range 1-4 2.1 (0.6) 2.1 (0.7)
• PCI retreating, mean (sd), range 1-4 1.7 (0.5) 1.7 (0.5)
• PCI resting, mean (sd), range 1-4 2.2 (0.6) 2.3 (0.6)
• PCI worrying, mean (sd), range 1-4 1.9 (0.5) 1.7 (0.5)
Social Support, mean (sd), range 12-60 53.2 (7.7) 53.8 (7.1)
  1. * Baseline characteristics with regard to body functions, comorbidity and cognitive functioning are presented in detail in previous research (4).
  2. ** N = 124 (X-rays were available in only a subsample of the included patients); *** N = 85 (X-rays were available in only a subsample of the included patients).
  3. N, n: number; sd: standard deviation; OA: osteoarthritis; BMI: body mass index; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; SF-36: MOS 36 item Short Form Health Survey; VAS: visual analogue scale; CIRS: cumulative illness rating scale; CST20: cognitive screening test 20 items: PCI: pain coping inventory.