Systematic review of diagnostic tools for peritoneal metastasis in gastric cancer-staging laparoscopy and its alternatives

Table 4 Patient demographics

Modality	Ref.	Total number of patients	Mean age in years (range)	Gender ratio (M:F)
PET	Lim et al[11], 2006	17	51.4 (32-74)	12:5
	Sim et al[33], 2009	52	62 (median) (33-80)	43:9
	Turlakow et al[34], 2003	88	54 (28-84)	50:38
	Perlaza et al[36], 2018	50	65.7 ± 12.1	30:20
	Kim et al[37], 2017	60	60.6 (29-80)	16:44
	Chen et al[38], 2005	68	54.8 (28-81)	49:19
	Kim et al[39], 2011	139	61.5 ± 11.6	88:51
MRI	Lin et al[35], 2021	62 (11 gastric)	56 ± 12 (54 ± 13 in gastric)	20:42 (6:5 in gastric)
	De Vuysere et al[40], 2021	32	(29-85)	22:10

PET: Positron emission tomography; MRI: Magnetic resonance imaging.