Table 1.

Characteristics of included studies on surgical treatment of patients with T1 gallbladder cancer

Authors	Yr	No. of patients	Primary outcome		Secondary outcome
			3 YSR	5 YSR	Morbidity	Mortality	Recurrence
Ogura et al[13]	1991	3661					NS
Shirai et al[26]	1992	89	NS	NS	NS
Ouchi et al[11]	1994	15	NS		NS
Chijiiwa et al[28]	1994	5	NS		NS
de Aretxabala et al[14]	1997	24	NS		NS		NS
Mori et al[22]	1997	9	NS	NS	NS
Benoist et al[1]	1998	362
Z'graggen et al[29]	1998	9		NS	NS
Shimada et al[9]	2000	17			NS
Suzuki et al[30]	2000	25	NS		NS
Wakai et al[6]	2001	25	NS		NS
Puhalla et al[24]	2002	9		NS
Wagholikar et al[7]	2002	14	NS		NS
Kim et al[17]	2002	19	NS		NS
Ouchi et al[18]	2002	2343	NS		NS
Wakai et al[10]	2002	15	NS		NS
Cucinotta et al[4]	2005	12	NS	NS	NS
Yildirim et al[15]	2005	13
Eguchi et al[31]	2005	12	NS	NS	NS
Sun et al[19]	2005	15	NS		NS
Otero et al[32]	2006	51	NS		NS
Yagi et al[8]	2006	13	NS		NS
Chan et al[12]	2006	33	NS	NS	NS
Cangemi et al[27]	2006	15	NS
Kang et al[16]	2007	11	NS
You et al[3]	2008	52	NS
Kwon et al[20]	2008	20	NS		NS
Kohya et al[21]	2008	15	NS		NS		NS
Goetze et al[5]	2008	934	NS		NS

¹Japan survey from 172 major hospitals;

²French cooperative group AURC (Association Universitaire de Recherche en Chirurgie);

³Japan nationwide survey on laparoscopic cholecystectomy from 253 hospitals;

⁴German Registry of Incidental Gallbladder Carcinoma of the German Society of Surgery. NS: Not stated.