RETRACTED ARTICLE: Meta-analysis of the efficacy of pancreatoduodenectomy with extended lymphadenectomy in the treatment of pancreatic cancer

Table 1 Basic information for studies included in the meta-analysis

Authors	Research time	Country	Average age (PD/ELND versus PD)	Male/Female (PD/ELND versus PD)	Number of cases (PD/ELND versus PD)	Indicators
Pedrazzoli et al. [10]	3/1991 to 3/1994	Italy	59.2/62	25/16	41/40	operative time, postoperative hospital stay, amount of blood transfusions, incidence of postoperative complications, mortality, 4-year survival rate
Pedrazzoli et al. [10]	3/1991 to 3/1994	Italy	59.2/62	27/13	41/40
Farnell et al. [11]	5/1997 to 7/2003	U.S.	67/66	18/21	39/40	operative time, postoperative hospital stay, incidence of postoperative complications, mortality, 1-, 3-, and 5-year survival rate,
Farnell et al. [11]	5/1997 to 7/2003	U.S.	67/66	20/20	39/40
Yeo et al. [12, 13]	4/1996 to 6/2001	U.S.	65.2/66.2	76/72	148/146	operative time, postoperative hospital stay, amount of blood transfusions, incidence of postoperative complications, mortality, 1-, 3-, and 5-year survival rate
Yeo et al. [12, 13]	4/1996 to 6/2001	U.S.	65.2/66.2	85/61	148/146
Nimura et al. [14]	2000.3 to 2003.5	Japan	61/62	25/26	51/50	operative time, postoperative hospital stay, amount of blood transfusions, incidence of postoperative complications, mortality, 1-, 3-, and 5-year survival rate
				25/25

PD, pancreatoduodenectomy; PD/ELDN, pancreatoduodenectomy with extended lymphadenectomy.

ISSN: 1477-7819