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. 2021 Mar 2;57(3):230. doi: 10.3390/medicina57030230

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Patient representation (n = 333) in the space (F1, F2) of Unstandardized Canonical Discriminant Functions between (LC, OC, Conversion). (Specification: functions at Group Centroids are: (−0.203, −0.004) for LC (laparoscopic cholecystectomy); (1.739, −0.964) for OC (open cholecystectomy) and (1.564, 0.508) for Conversion). Wilks’ lambda computed for the two canonical functions are significant (test of the two functions: chi-square (df = 10) 111.08, p < 0.001; test of second function: chi-square (df = 4) = 17.05, p = 0.002). Cross-validation of the model: 81.4% of cross-validated cases are correctly classified. The relative dispersion of patients with conversion to open surgery indicates that other factors, such as surgical experience or particular intraoperative findings, may be involved.