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Table 3 Characteristics of included trials of electro-acupuncture for pain relief in patients with knee osteoarthritis

From: Short-term efficacy of physical interventions in osteoarthritic knee pain. A systematic review and meta-analysis of randomised placebo-controlled trials

First author, publication year Type No of patients on active therapy (n = 121) Method quality Treatment period (weeks) Mean baseline pain (mm VAS) Best mean difference (95% CI) of change over placebo (mm VAS) Outcome assessment timepoints (weeks, best time point used in bold)
Sangdee-03 Maximal tolerable intensity 48 5 4 66.9 25.0 (15.2 to 34.8) 4, 8, 12
Vas-04 Maximal tolerable intensity 48 4 12 58.9 25.0 (13.4 to 36.6) 12
Yurtkuran-99 Maximal tolerable intensity 25 3 2 - 20.0 (14.1 to 25.9) 2
12 weeks Global improved   48     2.1 (1.1 to 4.1) Relative Risk  
Best within 4 weeks   73 4*   62.9† 21.3† (16.3 to 26.3) 3*
Total   121 4*   62.9† 21.9† (17.3 to 25.3) 3*
  1. *Mean † Weighted mean