The paper's original title is 66 characters too long for HN.

The "25% higher mortality" comes from the all-cause mortality result in "Findings", which is one of the main results of the paper. The paper expresses it as a hazard ratio (HR) of 1.25 [1.10–1.42]. Hazard ratios are standard in medical research, but I wanted to summarize the main result without jargon.