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Fig. 1 | BMC Medical Research Methodology

Fig. 1

From: Does different information disclosure on placebo control affect blinding and trial outcomes? A case study of participant information leaflets of randomized placebo-controlled trials of acupuncture

Fig. 1

Flow diagram for selection of studies. aAmong included studies, only those providing extractable data for calculating blinding index were included here. bStudies that clearly indicated and reported specific data of primary outcome were eligible for meta-analysis. RCT, randomized controlled trial

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BMC Medical Research Methodology

ISSN: 1471-2288

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