Prognostic factors associated with gastrointestinal dysfunction after gastrointestinal tumor surgery: A meta-analysis

Table 1 Basic characteristics and quality evaluation results of the included literatures

Ref.	Country	Research type	Surgical site	Cases	Incidence of POGD (%)	NOS score
Xu et al[13]	China	Retrospective cohort study	Colorectal cancer	187	16. 6	7
Huang et al[14]	China	Prospective cohort study	Gastric cancer	296	32. 4	7
Wang et al[17]	China	Retrospective cohort study	Gastric cancer	83	26. 5	8
Pu et al[24]	China	Retrospective cohort study	Colorectal cancer	404	18. 3	7
Wu et al[25]	China	Retrospective cohort study	Gastric cancer	312	41. 03	8
Liu et al[26]	China	Retrospective cohort study	Colorectum	260	31. 6	8
Tian et al[29]	China	Retrospective cohort study	Small intestine	247	40. 5	7
Franko et al[8]	America	Retrospective cohort study	Colorectum	820	4. 5	8
Kronberg et al[9]	America	Retrospective cohort study	Colorectum	413	10.2	7
Millan et al[10]	Spain	Retrospective cohort study	Colorectal cancer	773	15.96	7
Chapuis et al[11]	Australia	Retrospective cohort study	Colorectum	3393	14. 0	8
Kim MG et al[12]	Korea	Retrospective cohort study	Gastric cancer	389	1.8	7
Moghadamyeghaneh et al[15]	America	Retrospective cohort study	Colon	27560	12.7	7
Wolthuis et al[16]	Belgium	Retrospective cohort study	Colorectum	523	15. 9	7
Courtot et al[18]	France	Retrospective cohort study	Right colon cancer	637	17.7	8
Kim et al[19]	Korea	Retrospective cohort study	Ileum	220	8.1	8
Weng et al[20]	Russia	Prospective cohort study	Colorectal cancer	300	13. 0	8
Sugawara et al[21]	Japan	Prospective cohort study	Gastrointestinal tract	841	8.8	7
Aktaş et al[22]	Turkey	Prospective cohort study	Ileum	79	9. 0	7
Sapci et al[23]	America	Retrospective cohort study	Colorectal cancer	5369	16. 6	8
Greenberg et al[27]	America	Retrospective cohort study	Ileum	261	32.6	8
Namba et al[28]	Japan	Retrospective cohort study	Colorectal cancer	356	13. 5	7
Watkins et al[4]	South Africa	Retrospective cohort study	Colorectal cancer	155	36. 0	8

POGD: Postoperative gastrointestinal dysfunction; NOS: Newcastle-Ottawa Scale.