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Table 1 Characteristics of the five patient groups

From: The Dutch version of the knee injury and osteoarthritis outcome score: A validation study

  Mild OA (n = 36) Moderate OA (n = 62) Severe OA (n = 47) TKA (n = 63) Revision of TKA (n = 54)
Age in years 36 (27–50) 56 (27–72) 65 (42–81) 61(42–78) 77 (36–89)
Gender, women % 22 32 52 51 78
VAS pain 0.7 (0.0–6.7) 3.9 (0.0–10.0) 6.1 (1.0–10.0) 1 (0.0–9.4) 5.0 (0–10)
KOOS      
Pain 85.3 ± 18.5 62.9 ± 25.7 41.8 ± 18.9 70.1 ± 24.5 61.6 ± 23.4
Symptoms 78.6 ± 7.1 63.2 ± 24.4 46.4 ± 18.7 72.3 ± 18.5 64.7 ± 21.5
ADL 91.2 ± 15.1 69.3 ± 24.2 43.4 ± 19.4 72.8 ± 23.3 56.6 ± 21.9
Sport/recreation 71.0 ± 23.4 36.2 ± 32.0 29.1 ± 39.2 33.2 ± 24.1 26.8 ± 34.1
QoL 67.0 ± 21.6 44.6 ± 26.3 30.9 ± 25.5 52.2 ± 23.8 36.6 ± 26.6
SF-36      
BP 84.7 ± 19.7 63.6 ± 24.0 34.6 ± 22.1 70.7 ± 24.9 55.4 ± 27.2
PF 86.4 ± 17.2 61.1 ± 24.8 34.9 ± 20.6 61.7 ± 23.9 32.9 ± 24.4
SF 92.4 ± 10.5 82.8 ± 21.9 61.7 ± 28.1 81.8 ± 28.6 64.1 ± 29.0
RF 77.8 ± 38.2 64.8 ± 39.7 26.6 ± 34.7 57.4 ± 43.7 31.0 ± 38.8
RE 91.7 ± 25.7 87.4 ± 28.5 57.4 ± 44.3 69.7 ± 43.6 59.9 ± 42.6
MH 86.8 ± 13.4 79.6 ± 19.2 69.1 ± 20.0 74.6 ± 21.7 70.3 ± 20.7
VT 75.4 ± 13.4 68.9 ± 19.3 53.9 ± 19.3 66.5 ± 21.8 55.5 ± 19.1
GH 84.0 ± 12.8 65.0 ± 20.8 60.2 ± 23.0 66.8 ± 24.1 51.4 ± 21.3
  1. Results are presented as median (range) or mean ± SD. Abbreviations: OA; osteoarthritis, TKA; total knee arthroplasty, Revision of TKA; Revision of total knee arthroplasty; VAS, Visual Analogue Scale; BP, bodily pain; PF, physical function; SF, social function; RF, role limitations because of physical problems; RE, role limitations because of emotional problems; MH, mental health; VT, vitality; GH, general health perception; ADL, Activities of daily living; QoL, Quality of life.