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Table 2 Example of outcome measurements

From: Comparing the effects of individualized, standard, sham and no acupuncture in the treatment of knee osteoarthritis: a multicenter randomized controlled trial

Measures   Treatment visit  
  Baseline 1 2 3 4 5 6 7 8 9 10 11 12 Follow-up
Primary outcome measure               
WOMACa x        x      x x
Secondary outcome measure               
Success rateb x        x      x x
WOMAC pain(subscale) x x x x x x x x x x x x x x
100 mm pain VAS on walking x x x x x x x x x x x x x x
6-minute walk test x        x      x x
IGA/PGA x x x x x x x x x x x x x x
  1. aThe primary outcome is the change of WOMAC score after the 12-visit, 6-week trial.bSuccess will be defined as ≥36 % improvement in WOMAC score, and failure as <36 % improvement or missing values.IGA, investigator global assessment; PGA, patient global assessment; VAS, visual analogue scale; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index.