real-world resource use and costs of car-t therapies in diffuse large b-cell lymphoma (dlbcl)

Conditions: Diffuse Large B-cell Lymphoma (DLBCL)

Summary: a retrospective, non-interventional cohort study was used to address the study objectives. this study aimed to provide a better understanding of real-world healthcare resource utilization (hru) and healthcare reimbursement costs associated with car-t therapy among patients with r/r diffuse large b-cell lymphoma (dlbcl).

a retrospective, non-interventional cohort study was used to address the study objectives. this study aimed to provide a better understanding of real-world hru and healthcare reimbursement costs associated with car-t therapy among patients with r/r dlbcl. eligible adult patients with r/r dlbcl who were treated with car-t therapy or allo-hsct between january 1, 2017 to september 31, 2019 were identified from the centers for medicare \& medicaid services (cms) 100% medicare database. the car-t cohort was further classified into car-t ip and car-t op cohorts based on the infusion setting. the index date was defined as the date of car-t therapy administration or allo-hsct. baseline period was defined as three months prior to the index date. study period was defined from the index date to the end of health plan coverage based on insurance enrollment file or death, whichever occurred earlier. two sets of comparisons on hru and healthcare reimbursement costs were conducted, one between ip vs. op infusion of car-t, and the other between patients who received car-t therapy vs. allo-hsct.

Eligibility criteria:
inclusion criteria: car-t cohort: * patients had at least one international classification of diseases, tenth revision (icd- 10) diagnosis code for dlbcl. * patients received car-t therapy following dlbcl diagnosis. the administration date of car-t therapy was defined as the index date. patients who received both car-t therapy and allo-hsct were classified based on the first treatment that the patient received * patients were at least 18 years of age as of the index date * patients had at least three months of continuous eligibility in the medicare part a and part b data before the index date. since 2019 part d data is not available in the current data cut, eligibility requirement in the part d data was not required patients were further classified into car-t ip and car-t op cohorts depending on where the administration occurred. allo-hsct cohort: * patients had at least one icd-10 diagnosis code for dlbcl. * patients received allo-hsct following dlbcl diagnosis. the date of allo-hsct procedure was defined as the index date. patients who received both car-t therapy and allo-hsct were classified based on the first treatment the patient received * patients were at least 18 years of age as of the index date * patients had at least three months of continuous eligibility in the medicare part a and part b data before the index date. since 2019 part d data is not available in the current data cut, eligibility requirement in the part d data was not required exclusion criteria: - patients had a medical claim associated with a clinical trial (icd-9 cm code v70.7; icd-10 cm code z00.6) during one month before and after the index date

Keywords: car-t, dlbcl, inpatient, outpatient