Number And Cost Of Hospitalizations With Principal And Secondary Diagnoses Of Tuberculosis, United States

OBJECTIVE: To estimate the number and cost of hospitalizations with a diagnosis of active tuberculosis (TB) disease in the United States.METHODS: We analyzed the 2014 National In-Patient Sample using the International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9) codes to identify hospitalizations with a principal (TB-PD) or any secondary discharge (TB-SD) TB diagnosis. We used a generalized linear model with log link and gamma distribution to estimate the cost per TB-PD and TB-SD episode adjusted for patient demographics, insurer, clinical elements, and hospital characteristics.RESULTS: We estimated 4985 TB-PD and 6080 TB-SD hospitalizations nationwide. TB-PD adjusted averaged $16 695 per episode (95% CI $16 168-$17 221). The average for miliary/disseminated TB ($22 498, 95% CI $21 067-$23 929) or TB of the central nervous system ($28 338, 95% CI $25 836-$30 840) was significantly greater than for pulmonary TB ($14 819, 95% CI $14 284-$15 354). The most common principal diagnoses for TB-SD were septicemia (n = 965 hospitalizations), human immunodeficiency virus infection (n = 610), pneumonia (n = 565), and chronic obstructive pulmonary disease and bronchiectasis (COPD-B, n = 150). The adjusted average cost per TB-SD episode was $15 909 (95% CI $15 337-$16 481), varying between $8687 (95% CI $8337-$9036) for COPD-B and $23 335 (95% CI $21 979-$24 690) for septicemia. TB-PD cost the US health care system $123.4 million (95% CI $106.3-$140.5) and TB-SD cost $141.9 million ($128.4-$155.5), of which Medicaid/Medicare covered respectively 67.2% and 69.7%.CONCLUSIONS: TB hospitalizations result in substantial costs within the US health care system.