Conclusions not supported by methods and results

Abstract

Wandel and colleagues produced another meta-analysis of glucosamine in osteoarthritis without new evidence when more comprehensive ones showed that the quality controlled product of glucosamine sulphate for prescription is effective.1 2 3 4 Their statistical methods are so complex that many are mystified by whether the conclusions make sense.5 Indeed, we verified that a conventional approach gives identical results to their network meta-analysis …

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