Tian Y, et al. - In this national time-series study using data on 8 million hospital admissions in 184 cities in China between 2014 and 2017, authors examined the relationship between temperature variability and daily hospital admissions for cause-specific cardiovascular disease. They recorded an association of 1-°C increase in temperature variability at 0–1 day (TV0–1) with a 0.44%, 0.31%, 0.48%, 0.34%, and 0.82% increase in hospital admissions for cardiovascular disease, ischemic heart disease, heart failure, heart rhythm disturbances, and ischemic stroke, respectively. A mild but significant decrease in this relationship was observed when controlling for ambient fine particulate matter (PM_2.5), NO₂, and SO₂ pollution.