Jelena Savović

Context dependence of bias in randomized controlled trials: a Bayesian meta-epidemiological study from the BFREE project

Abstract Background Whether the magnitude of bias in randomized controlled trials (RCTs) varies systematically across study contexts remains unclear. We investigated how outcome type, intervention type, and comparator type influence bias-related inflation of treatment effect esti...

Implications for future pandemics from a living systematic review and critical evaluation of observational studies of the effectiveness of COVID-19 vaccination against the Omicron variant

Reliable evidence on COVID-19 vaccine effectiveness during the period of Omicron variant predominance was essential to inform global vaccination strategies. Our living systematic review, commissioned by the World Health Organization (WHO), was established to provide an ongoing sy...