Primary author contact for systematic reviews of randomized controlled trials: A systematic review

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Sep 20, 2025 (publication date) through Mar 6, 2025

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World Journal of Methodology

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2222-0682

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

Systematic Reviews

World J Methodol. Sep 20, 2025; 15(3): 95559
Published online Sep 20, 2025. doi: 10.5662/wjm.v15.i3.95559

Table 1 Summary of key results

Summary
Total number of SRs that report author contact in their paper (n = 329), n (%)	125 (38)
Total number of SRs that confirmed author contact but didn’t report it (n = 48), n (%)	25 (52)
The mean ± SD contacts made by authors per SR	10 (10) RCT authors
The mean ± SD response rate for SRs per author contact sent	0.49 (0.45) or 49% (45)
The mean ± SD and median (range) waiting time for responses prior to recording a non-response	10.1 (28.3) weeks and 4 (2-126) weeks

SR: Systematic review; RCTs: Randomized controlled trials.

Citation: Sinopoulou V, Shah E, Gordon M, Tony-Jimmy TE. Primary author contact for systematic reviews of randomized controlled trials: A systematic review. World J Methodol 2025; 15(3): 95559
URL: https://www.wjgnet.com/2222-0682/full/v15/i3/95559.htm
DOI: https://dx.doi.org/10.5662/wjm.v15.i3.95559