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Table 7 Characteristics of included trials of ultrasound therapy 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 = 74) Method quality Mean baseline pain (mm VAS) Best mean difference (95% CI) of change over placebo (mm VAS) Outcome assessment timepoints (weeks, best time point in bold)
Falconer-92 Maximal tolerable 0.1 to 2.5 W/cm2. 2–3 sessions/week, 12 sessions total 74 4 53.0 n.s. 4
Total   74 4 53.0 n.s. 4
  1. *Mean.
  2. † Weighted mean