The abdominal-transhiatal surgical approach versus the thoracoabdominal surgical approach in Siewert type II adenocarcinoma of the esophagogastric junction: protocol for a multicenter prospective, open, parallel, and randomized controlled trial

Table 1 Checklist for collection of necessary clinical data and follow-up schedule of enrolled patients

	Baseline information			Follow-up (months)
	Preoperation	Operation	Discharge	1	3	6	12	18	24	30	36
Informed consent	√
Demographic information	√
Anamnesis	√			√	√	√	√	√	√	√	√
Oncology history	√
Biopsy	√
Tumor classification	√
Laboratory tests	√			√	√	√	√	√	√	√	√
Physical examination	√			√	√	√	√	√	√	√	√
Inclusion/Exclusion	√
Randomization	√
Postoperative Complication				√
Pathology			√
Chest X-ray/CT	√						√		√		√
Gastroscopy	√						√		√		√
Abdominal CT/MRI	√				√	√	√	√	√	√	√
Abdominal ultrasound					√	√	√	√	√	√	√
Concomitant Medication	√		√	√	√	√	√	√	√	√	√
Surgical information		√

ISSN: 1471-2407