Association between lymphopenia and the survival of patients with colorectal cancer: A meta-analysis

Table 2 Study quality evaluation via the Newcastle-Ottawa Scale

Ref.	Representativeness of the exposed cohort	Selection of the non- exposed cohort	Ascertainment of exposure	Outcome not present at baseline	Control for age	Control for other confounding factors	Assessment of outcome	Sufficiently long follow-up duration	Adequacy of follow-up of cohorts	Total
Cézé et al[11]	0	1	1	1	1	1	1	0	1	7
Chu-Yuan et al[12]	0	1	1	1	1	1	1	1	1	8
Liang et al[13]	1	1	1	1	1	1	1	1	1	9
Iseki et al[14]	0	1	1	1	1	1	1	1	1	8
Oh et al[15]	0	1	1	1	1	1	1	1	1	8
Yamamoto et al[17]	1	1	1	1	0	0	1	1	1	7
Xu et al[16]	0	1	1	1	1	1	1	1	1	8
Shibutani et al[18]	0	1	1	1	1	1	1	1	1	8
Li et al[19]	0	1	1	1	1	1	1	1	1	8
Baik et al[20]	0	1	1	1	1	1	1	1	1	8
Koukourakis et al[21]	0	1	1	1	0	0	1	1	1	6
Soyfer et al[22]	0	1	1	1	1	1	1	1	1	8
Kim et al[23]	0	1	1	1	1	1	1	1	1	8