Absence of evidence or methodological issues? Commentary on “Stay-at-home policy is a case of exception fallacy: an internet-based ecological study”
We read with interest the paper written by Savaris et al. entitled “Stay-at-home policy is a case of exceptional fallacy: an internet-based ecological study”[1]. We believe that the topic of whether non-pharmaceutical interventions (NPIs) have an impact on COVID-19 mortality is a key metric that is important to measure, and applaud the authors for attempting to do so. However, we believe that several key deficiencies within the methodology make the conclusions – that the authors found no evidence that COVID-19 deaths were reduced by staying at home – largely meaningless. In this letter we explain the deficiencies in the analysis, and why the methodology may be inadequate to detect an effect even if it were to exist.