Deng F, Zhang Y, Zhao Q, et al. - Given the impact of underweight or obese status on prognosis of atrial fibrillation (AF) and that the link between stratification of BMI and in-hospital results in patients with AF is lacking in China, researchers compared characteristics, in-hospital managements as well as clinical results among the stratifications of BMI for Asians, using data from the Improving Care for Cardiovascular Disease in China-AF project. Enrolled patients with AF were 15,867 in total. Findings revealed the receipt of more medical treatments and less adverse in-hospital outcomes among Asian patients with AF and high BMI vs those with underweight–normal weight. Although a possible link of low BMI with other comorbidities and advanced age was suggested, a negative correlation of underweight BMI with all-cause death was observed in the patients with AF during hospitalization.