The Relation between Volume and Outcome of Transcatheter and Surgical Aortic Valve Replacement: A Systematic Review and Meta-Analysis

Table 1

Characteristics of included studies.

Name	Year	Operation	Lowest cut-off	Highest cut-off	Population	Hospital	Region	Period	Source/database	Data type
Agarwal	2015	SAVR	50	100	104,699	Approximately 1000	USA	2002-2011	Nationwide inpatient sample	Administrative
Birkmeyer	2002	SAVR	200	550	151,610	1069	USA	1994-1999	Centers for Medicare and Medicaid services	Administrative
Shuhaiber	2015	SAVR	8	19	87,675	Approximately 1000	USA	1998-2011	Nationwide inpatient sample	Administrative
Patel	2015	SAVR	98	98	6270	33	USA	2008-2011	Centers for Medicare and Medicaid services	Administrative
Goodney PP	2003	SAVR	230	230	59,389	Na	USA	1994-1999	The national Medicare database	Administrative
Astor	2000	SAVR	60	180	8741	176	USA	1994	Nationwide inpatient sample	Administrative
Ando	2018	TAVR	30	130	48,886	Na	USA	2011-2015	Nationwide inpatient sample	Administrative
Badheka	2015	TAVR	5	20	1481	Na	USA	2012	Nationwide inpatient sample	Administrative
Bestehorn	2017	TAVR	50	200	9924	87	Germany	2014	German Quality Assurance Registry on Aortic Valve Replacement of the Federal Joint Committee	Clinical
Kim	2015	TAVR	20 of TF; 10 of TA	20 of TF; 10 of TA	7660	256	USA	2012	Nationwide inpatient sample	Administrative
Wassef	2018	TAVR	50 and 100	50 and 100	3468	16	America and Europe	2005-2016	The international TAVR registry	Clinical
Kaier	2018	TAVR	50	100	43,996	113	Germany	2008-2014	Diagnosis-related group statistics	Administrative