Data collection and analysis:
Two independent review authors identified fifty five RCTs for potential inclusion. Quality and validity assessment was performed by two independent review authors. In the case of discrepancy, a third review author was consulted. Patient reported pain intensity and pain relief was assessed using visual analogue scales or verbal rating scales and adverse effects data were collated.
This record should be cited as:
Bell RF, Dahl JB, Moore RA, Kalso EA. Perioperative ketamine for acute postoperative pain. Cochrane Database of Systematic Reviews 2006, Issue 1. Art. No.: CD004603. DOI: 10.1002/14651858.CD004603.pub2