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. 2022 Mar 7;134(4):740–750. doi: 10.1213/ANE.0000000000005839

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Copyright © 2021 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the International Anesthesia Research Society.

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 3. — Forest plot for the mean difference of DSE between patients with easy and difficult direct laryngoscopies. CI indicates confidence interval; DSE, distance from skin to epiglottis; IV, inverse variance; SD, standard deviation.