Development and validation of machine learning models and nomograms for predicting the surgical difficulty of laparoscopic resection in rectal cancer

Table 1 Surgical difficulty grading

	Points
Duration of surgery >300 min	3
Conversion to open procedure	3
Postoperative hospital stay >14 days	2
VAT/BAS>85 cm2/m2	1
Morbidity (grade II and III)	1

ISSN: 1477-7819