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Table 6 Number of responders considered at the end of the study (week 4) and at 1 and 2 month(s) after treatment*.

From: Electroacupuncture versus Diclofenac in symptomatic treatment of Osteoarthritis of the knee: a randomized controlled trial

   1 month after treatment 2 months after treatment
Treatment groups responders at week 4 remaining responders/ evaluated responders remaining responders/ evaluated responders
Placebo 13 11/12 9/12
Diclofenac 18 10/16 7/15
EA 27 21/25 19/24
Combined 24 14/24 14/24
p value**   0.12 0.19
  1. * Only the responders at the end of the study were followed up for 2 months. Some patients were unable to be evaluated due to loss of follow up or use of NSAIDs for other purposes during the follow-up period. ** Fisher test between the four groups.