Biatrial versus Isolated Left Atrial Ablation in Atrial Fibrillation: A Systematic Review and Meta-Analysis
Table 1
Risk of bias in observational studies.
Study
Selection
Comparability
Outcome
Quality score
Assignment for treatment
Representative treatment group
Representative reference group
Comparable for 1, 2, 3,
Comparable for 5, 6, 7,
Assessment of outcome
Adequate follow-up
Gualis et al. 2016
No
Yes
Yes
1, 2
5, 8
Yes
No
★★★★★
Liu et al., 2015
No
Yes
Yes
1, 2
5, 8
No
Yes
★★★★★
Henn et al., 2015
No
Yes
Yes
NR
5, 6
Yes
No
★★★★
Pecha et al., 2014
No
Yes
Yes
1, 2
5, 8
Yes
NR
★★★★★
Jiang, 2014
No
Yes
Yes
1, 2
8
Yes
No
★★★★
Soni et al., 2013
No
Yes
Yes
1, 2
8
No
No
★★★
Pecha et al., 2014
No
Yes
Yes
1, 2
5, 6
Yes
Yes
★★★★★★
Onorati et al., 2011
No
Yes
Yes
1, 2
5, 6, 8
Yes
Yes
★★★★★★★
Kim et al., 2011
No
Yes
Yes
1, 2
7, 8
Yes
No
★★★★★
Breda et al., 2011
No
Yes
Yes
1, 2
6, 8
No
No
★★★★
Albage et al., 2011
No
Yes
Yes
1, 2
7
Yes
No
★★★★
McCarthy et al., 2010
No
Yes
Yes
1, 2
8
Yes
Yes
★★★★★★
Deneke et al., 2009
No
Yes
Yes
1, 4
6, 8
Yes
Yes
★★★★★★
Geuzebroek et al., 2008
No
Yes
Yes
1, 2
5
No
Yes
★★★★
Deneke et al., 2007
No
Yes
Yes
1, 4
8
Yes
Yes
★★★★★
Ryan et al., 2004
No
Yes
Yes
NR
5, 6, 7, 8
Yes
No
★★★★★
Guden et al., 2003
No
Yes
Yes
1, 2, 3
NR
Yes
Yes
★★★★★
Takami et al., 1999
No
Yes
Yes
1, 2, 3
5, 7, 8
Yes
Yes
★★★★★★★
NR: no report; comparability variables: 1 = age; 2 = gender; 3 = body mass index; 4 = type of AF; 5 = Euro score; 6 = preoperative antiarrhythmic drugs; 7 = anatomic complexity (more than one artery and/or vein); 8 = single surgeon.
