Christopher Evans, MPH

Systematic Review Consultant

Christopher Evans is a systematic review consultant who assists researchers with evidence synthesis, research methodology, and scientific writing. He has experience supporting projects involving literature screening, data extraction, risk of bias assessment, and meta-analysis. Christopher is dedicated to helping researchers produce comprehensive reviews that meet the highest standards of scientific integrity.

Areas of focus

Systematic review
Research methodology
Risk of bias assessment
Meta-analysis
Scientific writing

How the analysis is checked

Every guide and tool Christopher reviews follows the standard methods set out in the Cochrane Handbook for Systematic Reviews of Interventions and in Borenstein, Hedges, Higgins, and Rothstein, Introduction to Meta-Analysis. The pooling behind our calculators is validated against the metafor package in R and statsmodels in Python, so the numbers line up with what a statistician reproduces by hand. You can read more about how we calculate and check every result.

Guides by Christopher Evans

June 16, 2026 · 8 minHazard Ratio Interpretation in Survival StudiesWhat a hazard ratio above, below, or equal to 1 means, why it is a rate ratio rather than a cumulative risk, and how its logarithm is pooled in a meta-analysis.Read guide June 11, 2026 · 8 minRelative vs Absolute Risk ReductionHow relative risk reduction differs from absolute risk reduction, why an impressive relative figure can hide a tiny real benefit, and what to report.Read guide June 2, 2026 · 8 minOdds Ratio Interpretation, Made SimpleHow to read an odds ratio against the null value of 1, judge significance from its confidence interval, and avoid overstating effects for common outcomes.Read guide

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