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Heart rate turbulence of turbulence onset and turbulence slope is critically vagal dependent and highly correlated with spontaneous baroreflex sensitivity, which underscores its clinical importance in cardiovascular risk stratification.

Key Points Question Is attention-deficit/hyperactivity disorder (ADHD) associated with higher early mortality risk among patients in Taiwan? Findings In this Taiwan nationwide population-based cohort study, there were 275 980 patients with ADHD and 1 931 860 matched controls. After adjustment for potential confounders, patients with ADHD had significantly elevated early mortality risk for suicide, homicide, and unintentional injuries compared with the non-ADHD group. Meaning These findings suggest that ADHD may be associated with excess mortality from injury causes.