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![Operative difficulty in laparoscopic cholecystectomy: considering the role of machine learning platforms in clinical practice](https://image.oaes.cc/a0664374-289d-4c65-be42-befe044245f4/4713.fig.3.jpg)
Figure 3. Median Operative Time by Phase. Phase duration comparisons between Grade 1 and 2 (colored boxes) and Grade 3 and 4 (grey boxes). All phases took significantly longer to complete in grade 3 and 4 patients compared with grade 1 and 2 patients. Copyright. All rights reserved. Digital Surgery Ltd. 2021.