Figure 39 is a forest plot. Mean differences were reported or calculated for two short-term studies, with a pooled mean difference of −2.00 (95% confidence interval −4.15 to 0.04) and an overall I-squared value of 77.3%. Mean differences were reported or calculated for two intermediate-term studies, with a pooled mean difference of −1.04 (95% confidence interval −3.17 to 1.45) and an overall I-squared value of 74.9%.

Figure 39Low-level laser therapy versus usual care or sham for osteoarthritis knee pain: effects on pain

= confidence interval; = standard deviation; = usual care

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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