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Fig. 1 | BMC Medical Research Methodology

Fig. 1

From: Ideal vs. real: a systematic review on handling covariates in randomized controlled trials

Fig. 1

Article Search Results. Our search returned a total of 343 articles, 45 of which were excluded based on criteria illustrated here. Thus, the full review included 298 articles. Note that the one article excluded under the “Other” category was a non-typical RCT; the intervention was a country-wide policy change. Although it did not fall into the list of exclusion criteria, the reviewers made the post hoc decision to exclude this paper since the data could not be abstracted in the format we required for analyses

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