Self-described night owls in a study of more than 300,000 middle-aged and older UK Biobank participants had a 16% higher relative risk of a first heart attack or stroke than people with average chronotypes during 14 years of follow-up, AP reported. [1]

That number describes an observational association, not an experiment in bedtime. About 8% of participants classified themselves as night owls, while roughly a quarter called themselves early birds; self-description, residual confounding and the Biobank's representativeness all limit any claim that a late schedule caused an event. [1]

The more useful result sits beneath the label, as researchers reported that night owls, especially women, met fewer of the American Heart Association's eight heart-health measures and that smoking, insufficient sleep and poor diet appeared to explain much of the difference. [1] The study did not establish absolute event rates in AP's account, and relative risk should not be mistaken for an individual's diagnosis.

No verified X post is assigned, so deterministic social framing cannot be attributed to actual users. AP instead quotes lead researcher Sina Kianersi saying night owls are not doomed and points to the mismatch between internal clocks and conventional schedules. [1] Regular sleep, healthier food and quitting smoking are actionable; declaring a chronotype destiny is not. The evidence supports attention to habits and accommodation, not a moral hierarchy of alarm clocks.

-- NORA WHITFIELD, Chicago