Staging laparoscopy in esophagogastric junction cancer: Systematic review and meta-analysis

Table 1 Variables assessed to investigate the secondary objectives

Characteristics	Classification
Study characteristics	Year
	Country
	Study design
	Study period
Patient characteristics	Number of patients
	Sex
	Mean age
	Reported comorbidities and scoring systems (e.g., ASA, Charlson Comorbidity Index, Clinical Frailty Scale, POSSUM, etc.)
Siewert classification type
Indication for staging laparoscopy (T, N)
Technical description	Number of surgical ports used
	Camera angle employed
	Pneumoperitoneum pressure
	Quantification of carcinomatosis, if present
	Abdominal regions inspected
	Sites of peritoneal lavage sampling
	Timing of lavage
	Lavage volume instilled and aspirated
	Duration of the procedure
	Use of intraoperative ultrasound
	Conversion to laparotomy
Postoperative assessment	Presence of complications
	Sources used to evaluate complications
	Use of complication classification/scoring systems
	Follow-up duration
	Postoperative hospital stay
	Readmission
	Interval between SL and initiation of neoadjuvant therapy or definitive surgery

ASA: American Society of Anesthesiologists; POSSUM: Physiological and Operative Severity Score for the enUmeration of Mortality and Morbidity; SL: Staging laparoscopy.