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Table 9 Percentage ceiling/floor effects of the KOOS (best possible score/worst possible score)

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

  Pain Symptoms ADL Sport/Recreation QoL
Mild OA (n = 36) 28/ 0 22/ 0 42/ 0 14/0 11/0
Moderate OA (n = 62) 13/2 3/0 8/0 10/11 5/2
Severe OA (n = 47) 0/2 0/2 0/0 20/38 0/15
TKA (n = 63) 10/0 3/0 7/0 0/7 6/3
Revision of TKA (n = 54) 2/0 4/0 2/0 6/38 4/4
  1. Abbreviations: OA; osteoarthritis, Revision of TKA, Revision of total knee arthroplasty; ADL, Activities of daily living; QoL, Quality of life.