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. 2021 Feb 4;162(9):2320–2330. doi: 10.1097/j.pain.0000000000002231

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Copyright © 2021 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the International Association for the Study of Pain.

This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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Figure 4. — (A) Forest plot of the effect of a single ketamine injection on neuropathic pain measured within 3 hours of injection. (B) Forest plot of the effect of a single ketamine injection on neuropathic pain measured at 24 or 72 hours after injection. (C) Forest plot of the effect of repetitive ketamine injections or a continuous infusion on neuropathic pain, measured during ketamine administration. (D) Forest plot of the effect of repetitive ketamine injections or a continuous infusion on neuropathic pain, measured in the days after ketamine administration. The green diamonds are the group effect sizes ± 95% confidence intervals.