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. 2012 Apr 18;2012(4):CD007101. doi: 10.1002/14651858.CD007101.pub2

Wang 2008.

Methods Computer‐generated randomisation
Participants 106 drug‐refractory paroxysmal AF patients aged 66 +/‐8.8 years were enrolled. 54 patients were assigned to CPVI group, and 52 to CPVI + SVCI group.
Age: 66.6+/‐8.8 years in CPVI group, and 65.4+/‐8.9 years in CPVI+SVCI group. 
 % of male: 28/54 (52%) in CPVI group, and 30/52 (58%) in CPVI+SVCI group. 
 Follow‐up: 12 months.
Location: Shanghai, China.
Interventions CPVI plus SVCI compared with CPVI.
Outcomes AF‐free survival, recurrence of AT, complications.
Notes SVCI: superior vena cava isolation.
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Low risk Computer‐generated randomisation.
Allocation concealment (selection bias) Low risk A‐Yes. Sequence was generated by computer, which was better in allocation concealment.
Blinding High risk Blinding was not reported.
Incomplete outcome data addressed High risk There were no patients withdrawn or lost to follow up.
Adequate sequence generation Low risk Sequence was generated by computer program