Arrhythmia prevalence, predictors, and impact on hospital-associated outcomes among patients with diffuse large B-cell lymphoma

Introduction: Diffuse large B-cell lymphoma (DLBCL) patients have been reported to have cardiac manifestations, however, arrhythmias have not been characterized in this population. We examined the predictors of arrhythmias and assessed the impact of arrhythmias on inpatient outcomes among DLBCL patients.Methods: Retrospective cohort analysis was performed using the National Inpatient Sample data collected between 2016 and 2018. Multivariable logistic and linear regression models were used to examine the predictors of arrhythmias and inpatient outcomes among DLBCL patients.Results: 11% of DLBCL patients had a diagnosis of arrhythmias. Patients aged 70 years or older had 2.6 times higher odds (95% CI: 2.37-2.78) of having arrhythmias compared to patients younger than 70 years. Females were 23% (AOR: 0.77; 95% CI: 0.71-0.83) less likely to have a diagnosis of arrhythmias relative to their male counterparts. Compared to non-His-panic whites, patients who were non-Hispanic blacks (AOR: 0.69; 95% CI: 0.60-0.81), Hispanics (AOR: 0.60; 95% CI: 0.52 -0.69) or in the non-Hispanic other category (AOR: 0.80; 95% CI: 0.70-0.91) were significantly less likely to be diagnosed with arrhythmias. Other factors that predicted arrhythmias were patient disposition and comorbidity index. Additionally, arrhythmias were associated with higher inpatient mortality, length of stay and hospital costs.Conclusions: Older male patients were more likely to be diagnosed with arrhythmias while non-Hispanic blacks and His-panics were less likely to have arrhythmias. These findings highlight the need for surveillance to enable early detection of arrhythmias in this population.