Dual computer monitors to increase efficiency of conducting systematic reviews

Zhen Wang, Noor Asi, Tarig A. Elraiyah, Abd Moain Abu Dabrh, Chaitanya Undavalli, Paul Glasziou, Victor Montori, Mohammad Hassan Murad

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Objective: Systematic reviews (SRs) are the cornerstone of evidence-based medicine. In this study, we evaluated the effectiveness of using two computer screens on the efficiency of conducting SRs. Study Design and Setting: A cohort of reviewers before and after using dual monitors were compared with a control group that did not use dual monitors. The outcomes were time spent for abstract screening, full-text screening and data extraction, and inter-rater agreement. We adopted multivariate difference-in-differences linear regression models. Results: A total of 60 SRs conducted by 54 reviewers were included in this analysis. We found a significant reduction of 23.81 minutes per article in data extraction in the intervention group relative to the control group (95% confidence interval: -46.03, -1.58, P = 0.04), which was a 36.85% reduction in time. There was no significant difference in time spent on abstract screening, full-text screening, or inter-rater agreement between the two groups. Conclusion: Using dual monitors when conducting SRs is associated with significant reduction of time spent on data extraction. No significant difference was observed on time spent on abstract screening or full-text screening. Using dual monitors is one strategy that may improve the efficiency of conducting SRs.

Original languageEnglish (US)
Pages (from-to)1353-1357
Number of pages5
JournalJournal of Clinical Epidemiology
Issue number12
StatePublished - Dec 1 2014


  • Efficiency
  • Evidence-based medicine
  • Research design
  • Systematic reviews
  • Technology
  • Validity

ASJC Scopus subject areas

  • Epidemiology


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