Chandra, Ambarish and Høeg, Tracy Beth, Revisiting Pediatric COVID-19 Cases in Counties With and Without School Mask Requirements-United States,. Available at SSRN: https://ssrn.com/abstract=4118566 or http://dx.doi.org/10.2139/ssrn.4118566
The Lancet, a medical journal, has published a new study that debunks a widely cited CDC study that was used to support school mask mandates.
Specifically, the study not only replicates the CDC study , which found a “negative association” between masks and pediatric cases of covid-19, but also expands the study to include more districts over a longer period of time. In the end, the new study had nearly “six times more data than the original study.”
“Replicating the CDC study shows similar results; however, incorporating a larger sample and longer period did not show a significant relationship between mask mandates and case rates,” the study finds. “These results persisted when regression methods were used to control for differences between districts.
Interpretation: It is likely that school districts that choose to mandate masks are systematically different from those that do not in multiple, often unnoticed ways. We were unable to establish a relationship between school masking and pediatric cases using the same methods but with a larger, more nationally diverse population over a longer interval. Our study demonstrates that observational studies of interventions with small to moderate effect sizes are prone to bias caused by selection and omitted variables.
Chandra and Hoeg, Lancet, no benefit of school public masking in ecological analysis. No difference in pediatric cases which are characteristically mild and easily managed even in high risk cases or those with rare severe symptoms. pic.twitter.com/z3OVsmiISO
- Peter McCullough, MD MPH (@P_McCulloughMD) May 30, 2022
Translation: Chandra and Hoeg, Lancet, no benefit of school public masking in ecological analysis. No difference in pediatric cases that are characteristically mild and easy to manage even in high-risk cases or those with rare severe symptoms.
This study demonstrates how the CDC was cherry-picking data to support their school mask dogma. The article states that CDC’s MMWR journal rejected publishing this re-analysis. Most likely because it exposed the CDCs salami-slicing of data & use of science as political propaganda.
- Marty Makary MD, MPH (@MartyMakary) May 29, 2022
Important Lancet paper: replicates a CDC study claiming student masking is effective, but the conclusion doesn’t hold if expanded to a larger, more thorough analysis. Consistent trend: the higher quality the study, the more the mask benefit disappears. https://t.co/55G6030RQu
- Scott J Balsitis (@DrScottBalsitis) May 31, 2022
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