![]() ![]() Many empirical studies have shown that the methodological quality of randomised clinical trials of Traditional Chinese Medicine (TCM) is poor with respect to risk of systematic errors (bias generation of allocation sequence, allocation concealment, blinding, descriptions of drop-out or losses to follow-up, selective outcome reporting) and risk of random errors (play of chance). ![]() ![]() This may not represent the true situation for trials if the registry data are not updated by the researchers. Subsequent publications were obtained for those studies recorded as ‘completed’ in the registry. The registered information for clinical trials is not uniform across the registries and important methodological information may be missing. Systematic searches of all available international trial registries for any clinical trials of TCM.Īll interventions involving any TCM were included as was the diagnosis.
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