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Bommier C, Maurer MJ, Lambert J. What clinicians should know about surrogate end points in hematologic malignancies. Blood 2024; 144:11-20. [PMID: 38603637 DOI: 10.1182/blood.2023022269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 03/14/2024] [Accepted: 04/03/2024] [Indexed: 04/13/2024] Open
Abstract
ABSTRACT Use of surrogates as primary end points is commonplace in hematology/oncology clinical trials. As opposed to prognostic markers, surrogates are end points that can be measured early and yet can still capture the full effect of treatment, because it would be captured by the true outcome (eg, overall survival). We discuss the level of evidence of the most commonly used end points in hematology and share recommendations on how to apply and evaluate surrogate end points in research and clinical practice. Based on the statistical literature, this clinician-friendly review intends to build a bridge between clinicians and surrogacy specialists.
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Affiliation(s)
- Côme Bommier
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN
- Epidemiology and Clinical Statistics for Tumor, Respiratory, and Resuscitation Assessments Team, INSERM, U1153, Assistance Publique-Hôpitaux de Paris Hôpital St Louis, Université Paris Cité, Paris, France
| | - Matthew John Maurer
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN
- Division of Hematology, Mayo Clinic, Rochester, MN
| | - Jerome Lambert
- Epidemiology and Clinical Statistics for Tumor, Respiratory, and Resuscitation Assessments Team, INSERM, U1153, Assistance Publique-Hôpitaux de Paris Hôpital St Louis, Université Paris Cité, Paris, France
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Wang J, Yuan L, Cheng H, Fei X, Yin Y, Gu J, Xue S, He J, Yang F, Wang X, Yang Y, Zhang W. Salvaged allogeneic hematopoietic stem cell transplantation for pediatric chemotherapy refractory acute leukemia. Oncotarget 2018; 9:3143-3159. [PMID: 29423036 PMCID: PMC5790453 DOI: 10.18632/oncotarget.22809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 10/27/2017] [Indexed: 01/31/2023] Open
Abstract
There is an ongoing debate concerning the performance of salvaged allogeneic hematopoietic stem cell transplantation (allo-HSCT) in pediatric patients with acute refractory leukemia, in whom the prognosis is quite dismal. Few studies have ever been conducted on this subject. This may be partly due to missed opportunities by majority of the patients in such situations. To investigate the feasibility, evaluate the efficiency, and identify the prognostic factors of allo-HSCT in this sub-setting, the authors performed a single institution-based retrospective analysis. A total of 44 patients, of whom 28 had acute myeloid leukemia (AML), 13 had acute lymphocytic leukemia (ALL), and 3 had mixed phenotype leukemia (MPL), were enrolled in this study. With a median follow-up of 19 months, the estimated 2-year overall survival (OS) and progression free survival (PFS) were 34.3% (95% CI, 17.9–51.4%) and 33.6% (95% CI, 18.0–50.1%), respectively. The estimated 2-year incidence rates of relapse and non-relapse mortality (NRM) were 43.8% (95% CI 26.4–60.0%) and 19.6% (95% CI 9.1–32.9%), respectively. The estimated 100-day cumulative incidence of acute graft versus host disease (aGvHD) was 43.6% (95% CI 28.7–57.5%), and the 1-year cumulative incidence of chronic GvHD (cGvHD) was 45.5% (95% CI 30.5–59.3%). Compared with the previous studies, the multivariate analysis in this study additionally identified that female donors and cGvHD were associated with lower relapse and better PFS and OS. Male recipients, age younger than 10 years, a diagnosis of ALL, and the intermediate-adverse cytogenetic risk group were associated with increased relapse. On the contrary, extramedullary disease (EMD) and aGvHD were only linked to worse PFS. These data suggested that although only one-third of the patients would obtain PFS over 2 years, salvaged allo-HSCT is still the most reliable and best therapeutic strategy for refractory pediatric acute leukemia. If probable, choosing a female donor, better management of aGvHD, and induction of cGvHD promotes patient survival.
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Affiliation(s)
- Jingbo Wang
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Lei Yuan
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Haoyu Cheng
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Xinhong Fei
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Yumin Yin
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Jiangying Gu
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Song Xue
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Junbao He
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Fan Yang
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Xiaocan Wang
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Yixin Yang
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
| | - Weijie Zhang
- Department of Hematology, China Aerospace Central Hospital, Beijing, China
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