Laparoscopic gastrectomy versus open gastrectomy for elderly patients with gastric cancer: a systematic review and meta-analysis

Table 3 Quality assessment of included studies

Study	Selection				Comparability	Outcomes			Total
Study	Representativeness of exposed cohort	Selection of nonexposed cohort	Ascertainment of exposure	Outcome not present at the start of the study	Comparability	Assessment of outcomes	Length of follow-up	Adequacy of follow-up
Yasuda	*	*	*	*	**	*			*******
Mochiki	*	*	*	*	**	*	*	*	*********
Meng	*	*	*	*	**	*	*		********
Hu	*	*	*	*	**	*	*		********
Li	*	*	*	*	*	*	*		*******
Qiu	*	*	*	*	**	*			*******
Suzuki	*	*	*	*	**	*	*		********

ISSN: 1477-7819