Prognostic nutritional index in predicting survival of patients with gastric or gastroesophageal junction adenocarcinoma: A systematic review

Table 2 Newcastle-Ottawa scale scores for the included studies

Ref.	Selection				Comparability	Outcomes			Total
	Representativeness of the exposed cohort	Selection of the non exposed cohort	Ascertainment of exposure	Outcome of interest not present at the start of the study		Assessment of outcome	Length of follow-up	Adequacy of follow-up
Hashimoto et al[21]	*	*	*	*	*	*			6/8
Hirahara et al[31]	*	*	*	*	*	*	*	*	8/8
Hirahara et al[22]	*	*	*	*	*	*			6/8
Ishiguro et al[23]	*	*	*	*	*	*		*	7/8
Kudou et al[12]	*	*	*	*	*	*	*	*	8/8
Lee et al[13]	*	*	*	*	*	*	*	*	8/8
Lin et al[15]	*	*	*	*	*	*	*	*	8/8
Liu et al[24]	*	*	*	*	*	*		*	7/8
Murakami et al[1]	*	*	*	*	*	*		*	7/8
Saito et al[25]	*	*	*	*	*	*		*	7/8
Shen et al[26]	*	*	*	*	*	*	*	*	8/8
Takechi et al[17]	*	*	*	*	*	*			6/8
Toyokawa et al[27]	*	*	*	*	*	*	*	*	8/8
Toyokawa et al[28]	*	*	*	*	*	*	*	*	8/8
Wu et al[29]	*	*	*	*	*	*		*	7/8
Xu et al[30]	*	*	*	*	*	*	*	*	8/8