Cheng‐Wei 2017.

Methods	Parallel RCT Ethics committee: not reported Informed consents: not reported Site: Far Eastern Memorial Hospital, New Taipei City, Taiwan Setting: university hospital Dates of data collection: unspecified Funding: unspecified Registration: unspecified
Participants	37 participants; mean age: not reported; sex distribution: not reported Inclusion criteria Undergoing minimally invasive cardiac surgery Exclusion criteria Not reported
Interventions	Intervention Epidural analgesia (N = 18) Comparator Wound local anaesthetic infusion plus IV PCA (N = 19) Induction and maintenance: not reported Surgery: off‐pump CABG or valve surgery
Outcomes	Relevant to this review Tracheal extubation Pain scores Others ICU length of stay Hospital length of stay
Notes	Conflict of interest: not reported Correspondence: email sent 16 March 2018; no reply DOI: n/a Conference abstract, limited information
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "randomly allocated"; no details provided
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not reported
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	Low risk	Conference abstract; limited details provided
Selective reporting (reporting bias)	Low risk	Conference abstract; limited details provided
Other bias	Unclear risk	Conference abstract; limited details provided