Table 1 Collected information

 Age

x

 Sex

x

 Height and weight, BMI

x

 Medication

x

x

x

x

x

 ASA classification

x

 Clinical Frailty Scale-index (CFS)

x

 Comorbidities (include diseases subsumed in modifield Charlson Comorbidity Index)

x

 Haemoglobin, creatine, estimated GFR, albumin

x

 History of smoking and alcohol-consumption

x

x

x

x

x

 Other reported cancers excluding colon cancer

x

 Diagnostic procedures (colonoscopy, CT scan)

x

 Onco-geriatric screening tool (G-8)

x

x

x

x

x

 Mini Nutritional Assessment- Short Form (MNA-SF)

x

x

x

x

x

 Status of living

x

x

x

x

x

 Mobility

x

x

x

x

x

 Neuropsychological status

x

x

x

x

x

 Weight loss and food intake

x

x

x

x

x

 Self-related health status

x

x

x

x

x

 Patient information and approval

x

 Date of operation

x

 Used surgical technique (laparoscopy, open, conversion)

x

 Curative or palliative operation

x

 Demand for stoma

x

 Operative time and blood lose

x

 Surgical complications (anastomotic leakage, bleeding, ileus, wound dehiscence or infection, other) Clavien-Dindo classification

x

x

x

x

 Non-surgical complications (cardiovascular, pulmonary, urinary, delirium, other) Clavien-Dindo classification

x

x

x

x

 Reoperations

x

x

x

 Length of stay

x

x

 Place of discharge

x

x

 Readmissions

x

x

x

 Pathological report (TNM-status)

x

 Postoperative adjuvant treatment

x

x

x

 Recurrences (local and distant)

x

x

x

x

 Date of death