TABLE 6.

Volume–outcome articles for in-hospital mortality after esophagectomy 1998–2006

Author	Journal/Year	Data	Volume “cut-off”	Conclusion
Dimick et al.32	Ann Thorac Surg 2005	Adm	<6>	S
Urbach and Baxter33	BMJ 2004	Adm	<9>	NS
McCulloch et al.12	BMJ 2003	Clin	<10–20>	S
Christian et al.34	Ann Surg 2003	Adm	<22>	S
Finlayson et al.35	Arch Surg 2003	Adm	<4–9>	S
Urbach et al.36	CMAJ 2003	Adm	a	S
Dimick et al.37	Surgery 2003	Adm	<7>	S
Birkmeyer et al.9	N Engl J Med 2002	Adm	<2–4–7–19>	S
Gillison et al.11	Br J Surg 2002	Clin	<19>	NS
Bachmann et al.10	Br J Surg 2002	Clin	a	NS
Dimick et al.38	Ann Thorac Surg 2001	Adm	<4–15>	S
van Lanschot et al.7	Cancer 2001	Adm	<10–20>	S
Kuo et al.39	Ann Thorac Surg 2001	Adm	<6>	S
Swisher et al.40	J Thorac Cardiovasc Surg 2000	Adm	<5>	S
Gordon et al.41	J Am Coll Surg 1999	Adm	<10–20–50>	S
Begg et al.42	JAMA 1998	Mixed	<5–10>	S
Patti et al.43	J Gastrointest Surg 1998	Adm	<1–2–4–6>	S

^a Urbach and Bachmann used equally sized groups and reported only median volumes of these groups.

Adm denotes administrative data; Clin denotes clinical data; S denotes significant; NS denotes not significant.