Paul Alper points us to this news report by Susan Perry. I have no idea how good this study is—I have not looked at it at all, except to pull out those two ugly-but-somewhat-functional graphs above (where “SCA” stands for “sudden cardiac arrest”)—but I wanted to convey my approval for a news story reporting a study with a negative conclusion.
P.S. This would be a good dataset for fitting this model (see also cover of BDA3).