Table 1.

Collected information

	Preoperative	Surgery	Hospital stay	1 month	3 months	6 months	12 months
PRE-AND POST-INTERVENTION DATA
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
INTERVENTION DATA
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
POSTOPERATIVE DATA
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