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Table 3 Quality assessment of the included studies

From: Image-guided left ventricular lead placement in cardiac resynchronization therapy for patients with heart failure: a meta-analysis

First author (year) Selection bias (random sequence generation) Selection bias (allocation concealment) Performance bias (blinding of participants and personnel) Detection bias (blinding of outcome assessment) Attrition bias (incomplete outcome data) Reporting bias (selective reporting)
Saba (2013) [43] Y Unclear Y Unclear Y Y
Khan (2012) [42] Y Y Y Y Y Y
Bai (2011) [44] N N Unclear Y Y Y
  1. Y low risk of bias, N high risk of bias, Unclear insufficient data for judgment