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Table 2 Reliability of the PRTEE-S (Patientskattad Utvärdering av Tennisarmbåge).

From: Cross-cultural adaptation and determination of the reliability and validity of PRTEE-S (Patientskattad Utvärdering av Tennisarmbåge), a questionnaire for patients with lateral epicondylalgia, in a Swedish population

   Occasion 1 Occasion 2
Pain section Mean Score ± SD 4.18 ± 1.81 3.77 ± 1.80
  SEM 0.25 0.25
  95% CI 0.21 – 0.78 0.23 – 0.79
  Cronbachs α 0.84 0.83
  ICC 0.58 0.60
Function section Mean Score ± SD 3.90 ± 2.38 3.70 ± 2.29
  SEM 0.32 0.31
  95% CI 0.85 – 0.94 0.84 – 0.94
  Cronbachs α 0.93 0.92
  ICC 0.91 0.90
Overall (pain + function) Mean Score ± SD 4.04 ± 2.00 3.74 ± 1.97
  SEM 0.27 0.27
  95% CI 0.84 – 0.94 0.84 – 0.94
  Cronbachs α 0.94 0.94
  ICC 0.90 0.90
  1. Comparison of the PRTEE-S score for patients (n = 54) on two occasions, on the two sub-scales (pain and function score) and the total questionnaire (overall score).