Sarcopenia adversely impacts clinical outcomes in patients undergoing pancreaticoduodenectomy: A systematic review and meta-analysis

Table 3 Study quality evaluation

Ref.	Selection of study population	Comparability between the two groups	Outcome indicators	Total quality assessment score
Nishida et al[10]	4	2	1	7
Sandini et al[11]	4	2	1	7
Takagi et al[12]	4	2	2	8
Stretch et al[13]	4	2	3	9
Tankel et al[14]	4	2	1	7
Umetsu et al[6]	4	2	2	8
Centonze et al[15]	4	2	2	8
Xu et al[16]	4	2	1	7
Peng et al[17]	3	2	1	6
Pessia et al[18]	4	2	2	8
Duan et al[19]	4	2	2	8
Nauheim et al[20]	4	2	2	8
Aoki et al[21]	4	2	3	9
Umezawa et al[7]	4	2	1	7
La Vaccara et al[5]	4	2	2	8
Cai et al[22]	4	2	3	9