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Table 4 Test retest on item level

From: Validity and test retest reliability of the vascular quality of life Questionnaire-6: a short form of a disease-specific health-related quality of life instrument for patients with peripheral arterial disease

  PA % RP (CI 95%) RC (CI 95%) RV (CI 95%)
Item 1 Activity 59 0.03 (−0.04–0.12) −0.04 (−0.14–0.06) 0.11 (0.04–0.17)
Item 2 Symptom 60 −0.05 (−0.12–0.01) 0.02 (−0.07–0.11) 0.02 (0.01–0.04)
Item 3 Activity 68 −0.03 (−0.11–0.06) 0.07 (−0.15–0.01) 0.13 (0.04–0.22)
Item 4 Emotional 55 −0.07 (−0.15–0.00) −0.02 (−0.12–0.08) 0.09 (0.03–0.14)
Item 5 Social 64 0.01 (−0.07–0.06) 0.03 (−0.05–0.12) 0.03 (0.01–0.05)
Item 6 Pain 63 −0.04 (−0.12–0.04) −0.02 (−0.11–0.08) 0.10 (0.03–0.17)
  1. PA = Percentage agreement, 100% means no change in the answers
  2. RP = Relative position, RC = Relative concentration, RP and RC range from −1 to 1 and a systematic change occur when CI does not cover zero
  3. RV = Relative rank variance, the higher RV the larger individual variation and zero means total absence of individual variance