Systematic review and meta-analysis of prophylactic abdominal drainage after pancreatic resection

Table 2 Characteristics of included studies

Author, year	Country	Design	No. of patients	Group	Age (yr)	Male:female	Operation type: No. of patients
Heslin et al[6]	United States	OCS	89	Drain	65 ± 2	18:20 (58.1)	PD: 51
1998				No drain	65 ± 2	32:19	PD: 38
Conlon et al[8]	United States	RCT	179	Drain	66 (23-81)	46:42 (49.7)	PD: 73, DP: 15
2001				No drain	69 (33-87)	43:48	PD: 66, DP: 25
Fisher et al[7]	United States	OCS	228	Drain	63 (53-72)	78:101 (40.7)	PD: 123, DP: 56
2011				No drain	59 (51-70)	19:40	PD: 30, DP: 17
Paulus et al[26]	United States	OCS	59	Drain	52 (44-66)	NA	DP: 39
2012				No drain	58 (52-68)	NA	DP: 30
Adham et al[29]	France	OCS	242	Drain	61.5 (20-85)	66:64 (52.4)	PD: 79, DP: 29, Others: 22
2013				No drain	66.5 (19-85)	61:51	PD: 69, DP: 37, Others: 6
Correa-Gallego et al[9]	United States	OCS	739 (Subgroup A of PD)	Drain	NA	NA	PD: 386
2013				No drain	NA	NA	PD: 353
			350 (Subgroup B of DP)	Drain	NA	NA	DP: 154
				No drain	NA	NA	DP: 196
Lim et al[27]	France	OCS	54	Drain	62 (40-76)	8:19 (29.6)	PD: 27
2013				No drain	62 (38-78)	8:19	PD: 27
Mehta et al[28]	United States	OCS	709	Drain	60	130:121	PD: 251
2013				No drain	62.5	232:236	PD: 458
Van Buren et al[10]	United States	RCT	137	Drain	62.1 ± 11.7	37:31	PD: 68
2013				No drain	64.3 ± 12.6	38:31	PD: 69

OCS: Observational comparative study; PD: Pancreaticoduodenectomy; DP: Distal pancreatectomy; Others: Enucleation and Central pancreatectomy; NA: Not available.