[apsec112]

Me before reading: "this study, like ~every study, will detect no effect on all-cause mortality because that needs a crazy big sample size"

After reading: "this study, like ~every study, detected no effect on all-cause mortality because that needs a crazy big sample size"

A three-year study where one group magically had zero car crashes would need a sample size of 5,000,000 to detect a difference in all-cause mortality. It's really hard. (80% chance of p < 0.05)

[hedora]

They actually did show an improvement of all-cause mortality for one of the screens (corresponding to a 4 month increase in life expectancy), and "insignificant" improvements in others.

(The headline is probably technically true, but I think it is intentionally misleading and disingenuous.)