Re: Revisiting the association of blood pressure with mortality in oldest old people in China: community based, longitudinal prospective study
As noted previously by Dr Freedman and myself (https://twitter.com/tomhestonmd/status/1004735850209423361), this article makes a significant mistake in describing their data when they say that "Compared with a systolic blood pressure value of 129 mmHg, risk of all cause mortality decreased for values lower than 107 mm Hg." They should have stated that the risk of all cause mortality increased for systolic blood pressure values lower than 107 mmHg, not decreased.
Unfortunately this error has now been propagated into the Medline database as well (https://www.ncbi.nlm.nih.gov/pubmed/29871897). A U shaped curve in this research means that mortality increases for systolic blood pressures above 154 mmHg, increases for systolic blood pressures below 107, and is lowest for systolic blood pressures around 129 mmHg.
Competing interests: No competing interests