Night-Shift Intensity, Duration, Cardiovascular Susceptibility and Incident Cardiovascular Disease: UK Biobank Study

The study aimed to investigate how night-shift work affects cardiovascular disease risk, particularly considering baseline cardiovascular susceptibility and the differences between short-term intensity and long-term duration of night-shift exposure. Analyzing data from 85,322 UK Biobank participants, the authors found that night-shift exposure was associated with increased cardiovascular disease incidence, especially in individuals with higher baseline risk, with yearly duration showing a more consistent exposure-response relationship than monthly intensity.