Extended antimicrobial prophylaxis after gastric cancer surgery: A systematic review and meta-analysis

Table 1 Primary characteristics of the randomized controlled trails included in the meta-analysis

Ref.	Country	Sample size	Male	Median age (yr)	Body mass index (kg/m2)	Operation time (min)	Blood loss (mL)	Median follow-up time (d)
Schardey et al[7]	Germany	102	60	63.7 ± 11.4	NM	301.6 ± 87.7	NM	42
		103	59	62.6 ± 11.9	NM	314.8 ± 107	NM
			P > 0.05	P > 0.05	NM	P > 0.05	NM
Farran et al[8]	Spain	22	33	57(31-87)	NM	NM	NM	> 22
		27			NM	NM	NM
Imamura et al[9]	Japan	179	125	65	22.5 (12.4-32.9)	200 (64-415)	210 (1-1700)	30
		176	115	66	22.3 (16.3-33.0)	209 (58-428)	200 (1-880)
			P = 0.536	P = 0.429	P = 0.190	P = 0.499	P = 0.903
Mohri et al[10]	Japan	243	174	68 (22-91)	21.6 (13.4-31.6)	232 (43-70)	338.0 (10-2811)	30
		243	164	68 (23-90)	21.4 (13.6-34.0)	234 (70-492)	405.7 (10-2917)
			P = 0.375	P = 0.642	P = 0.446	P = 0.798	P = 0.028

NM: Not mentioned.