From January 1, 2012 to December 31, 2020, consecutive patients underwent PD performed at Institut Paoli-Calmettes for various pathologies. Data were entered prospectively into a clinical database (NCT02871336).
The cohort was split into 3 groups:
* a training cohort ;
* an internal validation cohort (Paoli Calmettes institute);
* an external validation cohort (Rennes Pontchaillou Hospital).
