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Table 1 Frequency of responses to knee instability questionnaire in patients with symptomatic medial compartment knee OA (n = 73)

From: Self-reported knee joint instability is related to passive mechanical stiffness in medial knee osteoarthritis

  Frequency Cumulative
  n % %
To what degree does giving way, buckling or shifting of the knee affect your level of daily activity?    
0 = The symptom prevents me from all daily activity 0 0.0 0.0
1 = The symptom affects my activity severely 10 13.7 13.7
2 = The symptom affects my activity moderately 14 19.2 32.9
3 = The symptom affects my activity slightly 20 27.4 60.3
4 = I have the symptom but it does not affect my activity 8 11.0 71.2
5 = I do not have giving way, buckling, or shifting of the knee 21 28.8 100.0