“Not statistically significant” is not the same as zero

Under the subject line, “Null misinterpretation of CIs reaches new level of lethality,” Sander Greenland points us to this article with the following in the Results section: Compared to no masks there was no reduction of influenza-like illness (ILI) cases (Risk Ratio 0.93, 95%CI 0.83 to 1.05) or influenza (Risk Ratio 0.84, 95%CI 0.61-1.17) for …