dos Santos AC, dos Santos JMB, da Costa Lima E, Land MGP. L-asparaginase doses number as a prognostic factor in childhood acute lymphoblastic leukemia: A survival analysis study.
Cancer Rep (Hoboken) 2022;
5:e1533. [PMID:
34431241 PMCID:
PMC9351670 DOI:
10.1002/cnr2.1533]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/03/2021] [Accepted: 08/09/2021] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND
The survival of children with acute lymphoblastic leukemia (ALL) has improved due to changes in the treatment and the disease diagnosis. A significant advance was the incorporation of asparaginase. However, hypersensitivity reactions are a common cause of early discontinuation of this drug.
AIM
The proposed study aims to evaluate early interruptions and the influence of the number of asparaginase doses effectively administered on the prognosis of patients with ALL.
METHODS AND RESULTS
An observational cohort study was carried out, with retrospective data collection, in medical records. The prognostic variables indicated in the protocol applied were used, and the principal outcomes were 5 years event-free survival (EFS) and 5 years of overall survival (OS) probability. Statistical analyzes were performed using SPPS 20.0 and R. In Cox's proportional hazards model for EFS and OS, variables of prognostic importance (n = 126 children) were: high-risk group (HGR), by the protocol classification, and less than 10 doses of asparaginase. The increased risk of events and death in HGR, who did less than 10 doses, was 3.6 and 7 times, respectively. The study did not show statistical significance for the number of asparaginase doses in patients who were not at high risk.
CONCLUSIONS
We demonstrated that the early interruption of asparaginase treatment could negatively impact the prognosis of patients with ALL, especially HGR, reinforcing the need for careful diagnosis of reactions and the availability of alternative types of asparaginase.
Collapse