Bmc Med Res Methodol
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Bmc Med Res Methodol · Jan 2001
ReviewUsing evidence from different sources: an example using paracetamol 1000 mg plus codeine 60 mg.
Meta-analysis usually restricts the information pooled, for instance using only randomised, double-blind, placebo-controlled trials. This neglects other types of high quality information. This review explores using different information for the combination of paracetamol 1000 mg and codeine 60 mg in acute postoperative pain. ⋯ Different designs of high quality trials can be used to support limited information used in meta-analysis without recourse to low quality trials that might be biased.