Figure 37 is a forest plot. Mean differences were reported or calculated for three short-term studies, with a pooled mean difference of −2.50 (95% confidence interval −6.37 to 1.22) and an overall I-squared value of 94.0%.

Figure 37Ultrasound versus sham for osteoarthritis knee pain: effects on function

= activities of daily living; = confidence interval; Con US = continuous ultrasound; C+P US = continuous and pulsed ultrasound combined; = Lequense Index; N = number; PFLI US = pulsed frequency low intensity ultrasound; = standard deviation.

From: Results

Cover of Noninvasive Nonpharmacological Treatment for Chronic Pain: A Systematic Review Update
Noninvasive Nonpharmacological Treatment for Chronic Pain: A Systematic Review Update [Internet].
Comparative Effectiveness Review, No. 227.
Skelly AC, Chou R, Dettori JR, et al.
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