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. 2023 Apr 18;72(10):1919–1926. doi: 10.1136/gutjnl-2022-327955

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© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Heterogeneity of the biliary sludge definitions used. Graphical representation of the definition heterogeneities for the term biliary sludge used in the included studies. Original papers (red, green and blue dots) as well as review papers (purple dots) are listed. Each dot symbolises a definition point mentioned in the paper (see definition legend; for specification of the anatomical classification (sludge definition F), see online supplemental file).**Gallstones not discriminated from microlithiasis. ***No difference between sludge and microlithiasis patients made. ****Video fragments used. CBD, common bile duct; GB, gallbladder, RCT, randomised controlled trial.