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1618 Background: Malignant pleural effusions are an indicator of metastatic malignancy, with poor survival and need for palliative procedures to alleviate symptoms. Our study aims to identify the disparities in the utilization of these procedures and their effects on hospitalization outcomes. Methods: The Nationwide Inpatient Sample (NIS) was used to identify all adult hospitalizations with malignant pleural effusion (MPL) between the years 2016-2020. We studied patient demographics and treatment modalities during admission. The study's primary outcome measure was to identify the difference in the total length of stay (LOS) and total healthcare cost (THC)incurred during admission. The secondary outcome was mortality rates among patients undergoing these procedures. Statistical analysis was done using multivariate linear and logistic regression models. Results: A total of 439,245 admissions for MPL were identified, constituting 0.2% of all U.S. admissions. Among these, 59.6% were females and mean age was 67.3 years. There were 68% Whites, 15% Blacks, 8% Hispanics, 4% Asians or Pacific Islanders, 0.4% Native Americans, and 2.9% others. About 61% had Medicare, 11.2% Medicaid, 25.7% Private insurance, and 1.9% Self-pay. Most admissions occurred in teaching hospitals (76.3%), urban settings (94.5%), and hospitals with larger bed strength (56.1%). The most common primary admission diagnosis was sepsis (8.3%). The most common primary malignancies were Lung (39.9%), breast (27.9%), gastrointestinal (9%), and hematopoietic malignancies (7.1%). We studied rates of thoracocentesis, Pleurodesis, Decortication, and intrapleural chemotherapy. The mean LOS and THC increased in admissions where procedures were performed, highest for decortication (12.1 days, p<0.01). However, the odds of death in hospitals significantly reduced. When compared to primary lung cancer causing malignant effusions, primary G.I., renal, urinary, and upper aerodigestive malignancies with MPL had significantly higher mortality rates (p<0.05). Disparities were observed in procedures performed, with women having 29% lower odds of undergoing decortication (p<0.001). African Americans had lower odds of undergoing any procedures for MPL when adjusted for age, sex insurance status, compared to whites. Teaching hospitals had 10.9 times higher odds of performing thoracocentesis but lower odds of performing pleurodesis and decortication (p<0.05). Conclusions: This investigation provides insights into the favorable impact of invasive procedures on in-hospital mortality for malignant pleural effusions, suggesting a possibility that patients with better performance status underwent such interventions. We also noted racial and sex-based disparities in the performance of these procedures. Further studies are essential to identify the reasons for this disparity to help promote equitable care.
George et al. (Wed,) studied this question.