1
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Darsaut TE, Rheaume AR, Chagnon M, Raymond J. The use and abuse of survival analysis and Kaplan-Meier curves in surgical trials. Neurochirurgie 2024; 70:101567. [PMID: 38761639 DOI: 10.1016/j.neuchi.2024.101567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Accepted: 04/30/2024] [Indexed: 05/20/2024]
Abstract
BACKGROUND Survival analysis based on Cox regression and Kaplan-Meier curves, initially devised for oncology trials, have frequently been used in other contexts where fundamental statistical assumptions (such as a constant hazard ratio) are not satisfied. This is almost always the case in trials that compare surgery with medical management. METHODS We review a trial that compared extracranial-intracranial bypass surgery (EC-IC bypass) with medical management (MM) of patients with symptomatic occlusion of the carotid or middle cerebral artery, where it was claimed that surgery was of no benefit. We discuss a hypothetical study and review other neurovascular trials which have also used survival analysis to compare results. RESULTS The trial comparing EC-IC bypass and MM did not satisfy the fundamental proportional hazard assumption necessary for valid analyses. This was also the case for two prior EC-IC bypass trials, as well as for other landmark neurovascular studies, such as the trials comparing endarterectomy with MM for carotid stenoses, or for the trial that compared intervention and MM for unruptured brain arteriovenous malformations. While minor deviations may have little effect on large trials, it may be impossible to show the benefits of surgery when trial size is small and deviations large. CONCLUSION Survival analyses are inappropriate in RCTs comparing surgery with conservative management, unless survival is calculated after the postoperative period. Alternative ways to compare final clinical outcomes, using for example a fixed follow-up period, should be planned for preventive surgical trials that compare intervention with conservative management.
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Affiliation(s)
- Tim E Darsaut
- University of Alberta Hospital, Division of Neurosurgery, Department of Surgery, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - Alan R Rheaume
- University of Alberta Hospital, Division of Neurosurgery, Department of Surgery, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - Miguel Chagnon
- Department of Mathematics and Statistics, University of Montreal, Montreal, Quebec, Canada
| | - Jean Raymond
- Department of Radiology, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.
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2
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Liu M, Chen P, Li T. Re: Fred Saad, Noel W. Clarke, Mototsugu Oya, et al. Olaparib plus Abiraterone Versus Placebo plus Abiraterone in Metastatic Castration-resistant Prostate Cancer (PROpel): Final Prespecified Overall Survival Results of a Randomised, Double-blind, Phase 3 Trial. Lancet Oncol 2023;24:1094-108. Eur Urol 2024; 85:e176-e177. [PMID: 38135561 DOI: 10.1016/j.eururo.2023.11.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 11/09/2023] [Indexed: 12/24/2023]
Affiliation(s)
- Miao Liu
- Department of Urology, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Peng Chen
- Department of Urology, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Tao Li
- Department of Urology, The Affiliated Hospital of Guizhou Medical University, Guiyang, China.
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3
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Iavarone M, Nault JC, Cabibbo G, Torres F, Reig M. Indolent cancer and pattern of progression: Two missing parameters in trial design for hepatology. Hepatology 2024; 79:1452-1462. [PMID: 37399245 PMCID: PMC11095876 DOI: 10.1097/hep.0000000000000527] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 01/20/2023] [Indexed: 07/05/2023]
Abstract
The indolent and aggressive behaviors of HCC might have a role in clinical trial (CT) results; however, the indolent HCC is less analyzed compared to others cancer. Indolent profile could be characterized as follows: (1) patients with low risk of progression itself due to the HCC molecular profile and/or due to the interaction between cancer cell their microenvironment; (2) patients who achieve objective response or present spontaneous regression; and (3) patients who develop radiological progression with no consequence on either the liver function or general status, and without trigger a change in the tumor stage. Patients with "indolent HCC" generally never develop cancer-related symptoms neither die for HCC-related causes. Thus, we hypothesize that the imbalance in the proportion of "indolent" versus "aggressive HCC" between arms or the underestimation/overestimation of HCC behavior at baseline in single-arm CT could be associated with CT failure or under-overestimation of trial results. The "indolent progression" may also explain the discrepancy between radiological progression-based end points and survival. Moreover, we discuss the related causes that explain the indolent profile of HCC and propose (1) refining the progression-related end point by the pattern of progression to minimize the limitations of the current end points; (2) considering alternative statistical tools for survival analysis such as milestone survival, or restricted mean survival time to capture the value of indolent HCC. According to these considerations, we propose incorporating novel end points into the single arm of phase I/II CT as exploratory analysis or as a secondary end point in phase III CT.
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Affiliation(s)
- Massimo Iavarone
- Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico—Division of Gastroenterology and Hepatology, Milan, Italy
| | - Jean-Charles Nault
- Centre de Recherche des Cordeliers, Sorbonne Université, Inserm, Université de Paris Cité, team « Functional Genomics of Solid Tumors », Equipe labellisée Ligue Nationale Contre le Cancer, Labex OncoImmunology, Paris, France
- Service d’hépatologie, Hôpital Avicenne, Hôpitaux Universitaires Paris-Seine-Saint-Denis, Assistance-Publique Hôpitaux de Paris, Bobigny, France
- Unité de Formation et de Recherche Santé Médecine et Biologie Humaine, Université Paris nord, Bobigny, France
| | - Giuseppe Cabibbo
- Section of Gastroenterology & Hepatology, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, PROMISE, University of Palermo, Palermo, Italy
| | - Ferran Torres
- Biostatistics Unit, Medical School, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Maria Reig
- Liver Oncology Unit. Liver Unit, Hospital Clínic Barcelona, Barcelona, Spain
- BCLC group, FUNDACIO/IDIBAPS, Barcelona, Spain
- CIBEREHD, Madrid, Spain
- Universitat de Barcelona, Barcelona, Spain
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4
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Bardo M, Huber C, Benda N, Brugger J, Fellinger T, Galaune V, Heinz J, Heinzl H, Hooker AC, Klinglmüller F, König F, Mathes T, Mittlböck M, Posch M, Ristl R, Friede T. Methods for non-proportional hazards in clinical trials: A systematic review. Stat Methods Med Res 2024; 33:1069-1092. [PMID: 38592333 PMCID: PMC11162097 DOI: 10.1177/09622802241242325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
For the analysis of time-to-event data, frequently used methods such as the log-rank test or the Cox proportional hazards model are based on the proportional hazards assumption, which is often debatable. Although a wide range of parametric and non-parametric methods for non-proportional hazards has been proposed, there is no consensus on the best approaches. To close this gap, we conducted a systematic literature search to identify statistical methods and software appropriate under non-proportional hazard. Our literature search identified 907 abstracts, out of which we included 211 articles, mostly methodological ones. Review articles and applications were less frequently identified. The articles discuss effect measures, effect estimation and regression approaches, hypothesis tests, and sample size calculation approaches, which are often tailored to specific non-proportional hazard situations. Using a unified notation, we provide an overview of methods available. Furthermore, we derive some guidance from the identified articles.
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Affiliation(s)
- Maximilian Bardo
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
- Maximilian Bardo and Cynthia Huber contributed equally to this study
| | - Cynthia Huber
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
- Maximilian Bardo and Cynthia Huber contributed equally to this study
| | - Norbert Benda
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
- Federal Institute for Drugs and Medical Devices, Bonn, Germany
| | - Jonas Brugger
- Center for Medical Data Science, Section of Medical Statistics, Medical University of Vienna, Vienna, Austria
| | - Tobias Fellinger
- Agentur für Gesundheit und Ernährungssicherheit (AGES), Vienna, Austria
| | | | - Judith Heinz
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
| | - Harald Heinzl
- Center for Medical Data Science, Section of Clinical Biometrics, Medical University of Vienna, Vienna, Austria
| | | | | | - Franz König
- Center for Medical Data Science, Section of Medical Statistics, Medical University of Vienna, Vienna, Austria
| | - Tim Mathes
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
| | - Martina Mittlböck
- Center for Medical Data Science, Section of Clinical Biometrics, Medical University of Vienna, Vienna, Austria
| | - Martin Posch
- Center for Medical Data Science, Section of Medical Statistics, Medical University of Vienna, Vienna, Austria
| | - Robin Ristl
- Center for Medical Data Science, Section of Medical Statistics, Medical University of Vienna, Vienna, Austria
| | - Tim Friede
- Department of Medical Statistics, University Medical Center Göttingen, Göttingen, Germany
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5
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Fletcher SMP, Chisholm A, Lavelle M, Guthier R, Zhang Y, Power C, Berbeco R, McDannold N. A study combining microbubble-mediated focused ultrasound and radiation therapy in the healthy rat brain and a F98 glioma model. Sci Rep 2024; 14:4831. [PMID: 38413663 PMCID: PMC10899261 DOI: 10.1038/s41598-024-55442-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/23/2024] [Indexed: 02/29/2024] Open
Abstract
Focused Ultrasound (FUS) has been shown to sensitize tumors outside the brain to Radiotherapy (RT) through increased ceramide-mediated apoptosis. This study investigated the effects of FUS + RT in healthy rodent brains and F98 gliomas. Tumors, or striata in healthy rats, were targeted with microbubble-mediated, pulsed FUS (220 kHz, 102-444 kPa), followed by RT (4, 8, 15 Gy). FUS + RT (8, 15 Gy) resulted in ablative lesions, not observed with FUS or RT only, in healthy tissue. Lesions were visible using Magnetic Resonance Imaging (MRI) within 72 h and persisted until 21 days post-treatment, indicating potential applications in ablative neurosurgery. In F98 tumors, at 8 and 15 Gy, where RT only had significant effects, FUS + RT offered limited improvements. At 4 Gy, where RT had limited effects compared with untreated controls, FUS + RT reduced tumor volumes observed on MRI by 45-57%. However, survival benefits were minimal (controls: 27 days, RT: 27 days, FUS + RT: 28 days). Histological analyses of tumors 72 h after FUS + RT (4 Gy) showed 93% and 396% increases in apoptosis, and 320% and 336% increases in vessel-associated ceramide, compared to FUS and RT only. Preliminary evidence shows that FUS + RT may improve treatment of glioma, but additional studies are required to optimize effect size.
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Affiliation(s)
- Stecia-Marie P Fletcher
- Department of Radiology, Brigham and Women's Hospital, Boston, MA, USA.
- Department of Radiology, Harvard Medical School, Boston, MA, USA.
| | - Amanda Chisholm
- Department of Radiology, Brigham and Women's Hospital, Boston, MA, USA
| | - Michael Lavelle
- Department of Radiation Oncology, Dana Farber Cancer Institute, Boston, MA, USA
- Department of Radiation Oncology, Brigham and Women's Hospital, Boston, MA, USA
| | - Romy Guthier
- Department of Radiation Oncology, Dana Farber Cancer Institute, Boston, MA, USA
- Department of Radiation Oncology, Brigham and Women's Hospital, Boston, MA, USA
- Department of Radiation Oncology, Harvard Medical School, Boston, MA, USA
| | - Yongzhi Zhang
- Department of Radiology, Brigham and Women's Hospital, Boston, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
| | - Chanikarn Power
- Department of Radiology, Brigham and Women's Hospital, Boston, MA, USA
| | - Ross Berbeco
- Department of Radiation Oncology, Dana Farber Cancer Institute, Boston, MA, USA
- Department of Radiation Oncology, Brigham and Women's Hospital, Boston, MA, USA
- Department of Radiation Oncology, Harvard Medical School, Boston, MA, USA
| | - Nathan McDannold
- Department of Radiology, Brigham and Women's Hospital, Boston, MA, USA
- Department of Radiology, Harvard Medical School, Boston, MA, USA
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6
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Carnero-Alcázar M, Montero-Cruces L, Cobiella-Carnicer J, Pérez-Camargo D, Maroto Castellanos L. Advanced considerations in survival analysis. Eur J Cardiothorac Surg 2024; 65:ezae020. [PMID: 38244566 DOI: 10.1093/ejcts/ezae020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 02/16/2024] [Accepted: 02/16/2024] [Indexed: 01/22/2024] Open
Abstract
Investigation of survival during the follow-up period is common in cardiovascular research and has intrinsic issues that require precise knowledge, such as survival or censoring. Besides, as the follow-up period lengthens and events other than mortality are studied, the analysis becomes more complex, so Kaplan-Meier analyses or Cox models are not always sufficient. In this primer, we provide the reader with detailed information on the interpretation of the most common survival analyses and delve into methods to analyse competing risks or alternatives to the conventional methods when the proportional hazards assumption is not met.
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Affiliation(s)
| | | | | | - Daniel Pérez-Camargo
- Department of Cardiac Surgery, Hospital Clínico San Carlos, CardioRed1, Madrid, Spain
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7
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Friedrich S, Friede T. On the role of benchmarking data sets and simulations in method comparison studies. Biom J 2024; 66:e2200212. [PMID: 36810737 DOI: 10.1002/bimj.202200212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 01/26/2023] [Accepted: 02/01/2023] [Indexed: 02/24/2023]
Abstract
Method comparisons are essential to provide recommendations and guidance for applied researchers, who often have to choose from a plethora of available approaches. While many comparisons exist in the literature, these are often not neutral but favor a novel method. Apart from the choice of design and a proper reporting of the findings, there are different approaches concerning the underlying data for such method comparison studies. Most manuscripts on statistical methodology rely on simulation studies and provide a single real-world data set as an example to motivate and illustrate the methodology investigated. In the context of supervised learning, in contrast, methods are often evaluated using so-called benchmarking data sets, that is, real-world data that serve as gold standard in the community. Simulation studies, on the other hand, are much less common in this context. The aim of this paper is to investigate differences and similarities between these approaches, to discuss their advantages and disadvantages, and ultimately to develop new approaches to the evaluation of methods picking the best of both worlds. To this aim, we borrow ideas from different contexts such as mixed methods research and Clinical Scenario Evaluation.
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Affiliation(s)
- Sarah Friedrich
- Institute of Mathematics, University of Augsburg, Augsburg, Germany
- Centre for Advanced Analytics and Predictive Sciences, University of Augsburg, Augsburg, Germany
| | - Tim Friede
- Department of Medical Statistics, University Medical Center Göttingen, Humboldtallee, Göttingen, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Göttingen, Göttingen, Germany
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8
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You N, He X, Dai H, Wang X. Ball divergence for the equality test of crossing survival curves. Stat Med 2023; 42:5353-5368. [PMID: 37752757 DOI: 10.1002/sim.9914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 08/07/2023] [Accepted: 09/11/2023] [Indexed: 09/28/2023]
Abstract
It is a very common problem to test survival equality using the right-censored time-to-event data in clinical research. Although the log-rank test is popularly used in various studies, it may become insensitive when the proportional hazards assumption is violated. As follows, there have a variety of statistical methods being proposed to identify the discrepancy between crossing survival curves or hazard functions. The omnibus tests against general alternatives are usually preferred due to their wide applicability to complicated scenarios in real applications. In this paper, we propose two novel statistics to estimate the ball divergence using the right-censored survival data, and then implement them in the equality test on survival time in two independent groups. The simulation analysis demonstrates their efficiency in identifying the survival discrepancy. Compared to the existing methods, our proposed methods present higher power in situations with complex distributions, especially when there is a scale shift between groups. Real examples illustrate its advantage in practical applications.
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Affiliation(s)
- Na You
- School of Mathematics, Sun Yat-sen University, Guangdong, China
- Department of Mathematical Sciences, University of Essex, Colchester, UK
| | - Xueyi He
- School of Mathematics, Sun Yat-sen University, Guangdong, China
| | - Hongsheng Dai
- Department of Mathematical Sciences, University of Essex, Colchester, UK
- School of Mathematics, Statistics and Physics, Newcastle University, Newcastle upon Tyne, UK
| | - Xueqin Wang
- School of Management, University of Science and Technology of China, Anhui, China
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9
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Efird JT. The Inverse Log-Rank Test: A Versatile Procedure for Late Separating Survival Curves. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:7164. [PMID: 38131716 PMCID: PMC10743107 DOI: 10.3390/ijerph20247164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 11/23/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023]
Abstract
Often in the planning phase of a clinical trial, a researcher will need to choose between a standard versus weighted log-rank test (LRT) for investigating right-censored survival data. While a standard LRT is optimal for analyzing evenly distributed but distinct survival events (proportional hazards), an appropriately weighted LRT test may be better suited for handling non-proportional, delayed treatment effects. The "a priori" misspecification of this alternative may result in a substantial loss of power when determining the effectiveness of an experimental drug. In this paper, the standard unweighted and inverse log-rank tests (iLRTs) are compared with the multiple weight, default Max-Combo procedure for analyzing differential late survival outcomes. Unlike combination LRTs that depend on the arbitrary selection of weights, the iLRT by definition is a single weight test and does not require implicit multiplicity correction. Empirically, both weighted methods have reasonable flexibility for assessing continuous survival curve differences from the onset of a study. However, the iLRT may be preferable for accommodating delayed separating survival curves, especially when one arm finishes first. Using standard large-sample methods, the power and sample size for the iLRT are easily estimated without resorting to complex and timely simulations.
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Affiliation(s)
- Jimmy T. Efird
- VA Cooperative Studies Program Coordinating Center, Boston, MA 02111, USA;
- School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
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10
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Tilmont R, Yakoub-Agha I, Eikema DJ, Zinger N, Haenel M, Schaap N, Arroyo CH, Schuermans C, Besemer B, Engelhardt M, Kuball J, Michieli M, Schub N, Wilson KMO, Bourhis JH, Mateos MV, Rabin N, Jost E, Kröger N, Moraleda JM, Za T, Hayden PJ, Beksac M, Mclornan D, Schönland S, Manier S. Carfilzomib, lenalidomide and dexamethasone followed by a second ASCT is an effective strategy in first relapse multiple myeloma: a study on behalf of the Chronic malignancies working party of the EBMT. Bone Marrow Transplant 2023; 58:1182-1188. [PMID: 37543712 PMCID: PMC10622318 DOI: 10.1038/s41409-023-02048-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/30/2023] [Accepted: 07/17/2023] [Indexed: 08/07/2023]
Abstract
In the setting of a first relapse of multiple myeloma (MM), a second autologous stem cell transplant (ASCT) following carfilzomib-lenalidomide-dexamethasone (KRd) is an option, although there is scarce data concerning this approach. We performed a retrospective study involving 22 EBMT-affiliated centers. Eligible MM patients had received a second-line treatment with KRd induction followed by a second ASCT between 2016 and 2018. Primary objective was to estimate progression-free survival (PFS) and overall survival (OS). Secondary objectives were to assess the response rate and identify significant variables affecting PFS and OS. Fifty-one patients were identified, with a median age of 62 years. Median PFS after ASCT was 29.5 months while 24- and 36-months OS rates were 92.1% and 84.5%, respectively. Variables affecting PFS were an interval over four years between transplants and the achievement of a very good partial response (VGPR) or better before the relapse ASCT. Our study suggests that a relapse treatment with ASCT after KRd induction is an effective strategy for patients with a lenalidomide-sensitive first relapse. Patients with at least four years of remission after a frontline ASCT and who achieved at least a VGPR after KRd induction appear to benefit the most from this approach.
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Affiliation(s)
- Rémi Tilmont
- Hematologie Clinique, CHU de Lille, Lille, France
| | - Ibrahim Yakoub-Agha
- Hematologie Clinique, CHU de Lille, Lille, France
- CHU de Lille, Univ Lille, INSERM U1286, Infinite, Lille, France
| | | | | | | | - Nicolaas Schaap
- Radboud University, Medical Centre Nijmegen, Nijmegen, Netherlands
| | | | | | | | | | | | | | - Natalie Schub
- University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | | | | | | | - Neil Rabin
- University College London Hospital, London, UK
| | - Edgar Jost
- University Hospital Aachen, Aachen, Germany
| | | | | | - Tommaso Za
- Section of Hematology, Catholic University, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Patrick J Hayden
- Department of Haematology, School of Medicine, Trinity College Dublin, Dublin, Ireland
| | - Meral Beksac
- Ankara University Faculty of Medicine, Ankara, Turkey
| | - Donal Mclornan
- University College London Hospitals NHS Trust, Heidelberg, Germany
| | - Stefan Schönland
- Medizinische Klinik u. Poliklinik V, University of Heidelberg, Heidelberg, Germany
| | - Salomon Manier
- Hematologie Clinique, CHU de Lille, Lille, France.
- Univ Lille, Canther, INSERM UMR-S1277 CNRS UMR9020, Lille, France.
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11
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Godoy LC, Ko DT, Farkouh ME, Shah BR, Austin PC. Dealing With Nonproportional Hazards in Coronary Revascularisation Studies. Can J Cardiol 2023; 39:1651-1660. [PMID: 37468120 DOI: 10.1016/j.cjca.2023.07.014] [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: 02/27/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 07/21/2023] Open
Abstract
The Cox proportional hazards model is one of the most popular statistical tools to model time to event outcomes without the need for specifying the hazards or survival time distributions. The Cox model requires that the ratio of the hazards of the occurrence of the outcome for any 2 individuals remains constant during the entire follow-up. Studies comparing coronary revascularisation strategies, however, might be prone to violations of proportionality by the crossing of the hazard functions over time. Early increases in the risk of cardiovascular outcomes are commonly observed when comparing coronary artery bypass grafting vs percutaneous coronary intervention, whereas decreased risk might be observed later during the follow-up. The same is valid for comparisons between invasive vs conservative coronary revascularisation strategies. In these situations, the statistical power of the Cox model is reduced, and hazard ratios might not be an informative summary measure of treatment effect. In this article, we discuss methods to identify and account for nonproportionality. We illustrate the use of these methods in a case study based on reconstructed data from a coronary revascularisation clinical trial. And finally, we review the cardiovascular literature to estimate how the proportionality assumption has been reported in coronary revascularisation studies recently.
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Affiliation(s)
- Lucas C Godoy
- Peter Munk Cardiac Centre, University of Toronto, Toronto, Ontario, Canada; ICES, Toronto, Ontario, Canada; Institute of Health Policy Management, and Evaluation, University of Toronto, Toronto, Ontario, Canada
| | - Dennis T Ko
- ICES, Toronto, Ontario, Canada; Institute of Health Policy Management, and Evaluation, University of Toronto, Toronto, Ontario, Canada; Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Michael E Farkouh
- Peter Munk Cardiac Centre, University of Toronto, Toronto, Ontario, Canada; Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Baiju R Shah
- ICES, Toronto, Ontario, Canada; Institute of Health Policy Management, and Evaluation, University of Toronto, Toronto, Ontario, Canada; Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Peter C Austin
- ICES, Toronto, Ontario, Canada; Institute of Health Policy Management, and Evaluation, University of Toronto, Toronto, Ontario, Canada.
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12
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Taïeb J, Bouche O, André T, Le Malicot K, Laurent-Puig P, Bez J, Toullec C, Borg C, Randrian V, Evesque L, Corbinais S, Perrier H, Buecher B, Di Fiore F, Gallois C, Emile JF, Lepage C, Elhajbi F, Tougeron D. Avelumab vs Standard Second-Line Chemotherapy in Patients With Metastatic Colorectal Cancer and Microsatellite Instability: A Randomized Clinical Trial. JAMA Oncol 2023; 9:1356-1363. [PMID: 37535388 PMCID: PMC10401392 DOI: 10.1001/jamaoncol.2023.2761] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 05/24/2023] [Indexed: 08/04/2023]
Abstract
Importance Only 1 randomized clinical trial has shown the superiority of immune checkpoint inhibitors in patients with deficient mismatch repair and/or microsatellite instability (dMMR/MSI) metastatic colorectal cancer (mCRC) in the first-line setting. Objectives To determine whether avelumab (an anti-programmed cell death ligand 1 antibody) improves progression-free survival (PFS) compared with standard second-line chemotherapy in patients with dMMR/MSI mCRC. Design, Setting, and Participants The SAMCO-PRODIGE 54 trial is a national open-label phase 2 randomized clinical trial that was conducted from April 24, 2018, to April 29, 2021, at 49 French sites. Patients with dMMR/MSI mCRC who experienced progression while receiving standard first-line therapy were included in the analysis. Interventions Patients were randomized to receive standard second-line therapy or avelumab every 2 weeks until progression, unacceptable toxic effects, or patient refusal. Main Outcome and Measures The primary end point was PFS according to RECIST (Response Evaluation Criteria in Solid Tumours), version 1.1, evaluated by investigators in patients with mCRC and confirmed dMMR and MSI status who received at least 1 dose of treatment (modified intention-to-treat [mITT] population). Results A total of 122 patients were enrolled in the mITT population. Median age was 66 (IQR, 56-76) years, 65 patients (53.3%) were women, 100 (82.0%) had a right-sided tumor, and 52 (42.6%) had BRAF V600E-mutated tumors. There was no difference in patients and tumor characteristics between treatment groups. No new safety concerns in either group were detected, with fewer treatment-related adverse events of at least grade 3 in the avelumab group than in the chemotherapy group (20 [31.7%] vs 34 [53.1%]; P = .02). After a median follow-up of 33.3 (95% CI, 28.3-34.8) months, avelumab was superior to chemotherapy with or without targeted agents with respect to PFS (15 [24.6%] vs 5 [8.2%] among patients without progression; P = .03). Rates of PFS rates at 12 months were 31.2% (95% CI, 20.1%-42.9%) and 19.4% (95% CI, 10.6%-30.2%) in the avelumab and control groups, respectively, and 27.4% (95% CI, 16.8%-39.0%) and 9.1% (95% CI, 3.2%-18.8%) at 18 months. Objective response rates were similar in both groups (18 [29.5%] vs 16 [26.2%]; P = .45). Among patients with disease control, 18 (75.7%) in the avelumab group compared with 9 (19.1%) in the control group had ongoing disease control at 18 months. Conclusions The SAMCO-PRODIGE 54 phase 2 randomized clinical trial showed, in patients with dMMR/MSI mCRC, better PFS and disease control duration with avelumab over standard second-line treatment, with a favorable safety profile. Trial Registration ClinicalTrials.gov Identifier: NCT03186326.
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Affiliation(s)
- Julien Taïeb
- Institut du Cancer Paris Cancer Research for Personalized Medicine, Assistance Publique–Hôpitaux de Paris (AP-HP), Hôpital Européen Georges Pompidou, Paris, France
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre National de la Recherche Scientifique, Sorbonne Université, Université Sorbonne Paris Cité, Université de Paris, Paris, France
- Department of Gastroenterology and Digestive Oncology, Georges Pompidou European Hospital, AP-HP Centre, Université Paris Cité, Paris, France
| | - Olivier Bouche
- Department of Digestive Oncology, Centre Hospitalier Universitaire (CHU) Reims, Reims, France
| | - Thierry André
- Sorbonne Université and Hôpital Saint Antoine, INSERM 938 and Site de Recherche Intégrée sur le Cancer CURAMUS, Paris, France
| | - Karine Le Malicot
- Fédération Francophone de Cancérologie Digestive, EPICAD INSERM Lipides Nutrition Cancer–Unité Mixte de Recherche 1231, University of Burgundy and Franche Comté, Dijon, France
| | - Pierre Laurent-Puig
- Institut du Cancer Paris Cancer Research for Personalized Medicine, Assistance Publique–Hôpitaux de Paris (AP-HP), Hôpital Européen Georges Pompidou, Paris, France
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre National de la Recherche Scientifique, Sorbonne Université, Université Sorbonne Paris Cité, Université de Paris, Paris, France
- Department of Gastroenterology and Digestive Oncology, Georges Pompidou European Hospital, AP-HP Centre, Université Paris Cité, Paris, France
| | - Jérémie Bez
- Fédération Francophone de Cancérologie Digestive, EPICAD INSERM Lipides Nutrition Cancer–Unité Mixte de Recherche 1231, University of Burgundy and Franche Comté, Dijon, France
| | - Clémence Toullec
- Department of Medical Oncology, Institut du Cancer, Avignon-Provence, France
| | - Christophe Borg
- Department of Medical Oncology, University Hospital of Besançon, Besançon, France
| | - Violaine Randrian
- Department of Gastroenterology and Hepatology, Poitiers University Hospital, Poitiers, France
| | - Ludovic Evesque
- Department of Medical Oncology, Centre Antoine Lacassagne, Nice, France
| | | | - Hervé Perrier
- Department of Hepato-Gastroenterology, Hôpital Saint-Joseph, Marseille, France
| | - Bruno Buecher
- Department of Oncology, Institut Curie, Paris, France
| | - Frederic Di Fiore
- Hepatogastroenterology Department, CHU Rouen, University of Rouen Normandy, INSERM 1245, Institut de Recherche en Oncologie Group, Normandie University, Rouen, France
| | - Claire Gallois
- Institut du Cancer Paris Cancer Research for Personalized Medicine, Assistance Publique–Hôpitaux de Paris (AP-HP), Hôpital Européen Georges Pompidou, Paris, France
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre National de la Recherche Scientifique, Sorbonne Université, Université Sorbonne Paris Cité, Université de Paris, Paris, France
| | - Jean Francois Emile
- EA4340, Pathology Department and INSERM, Ambroise Paré Hospital, Boulogne, France
| | - Côme Lepage
- Sorbonne Université and Hôpital Saint Antoine, INSERM 938 and Site de Recherche Intégrée sur le Cancer CURAMUS, Paris, France
- Department of Digestive Oncology, University Hospital Dijon, University of Burgundy and Franche Comté, Dijon, France
| | - Farid Elhajbi
- Medical Oncology Department, Oscar Lambret Center, Lille, France
| | - David Tougeron
- Department of Gastroenterology and Hepatology, Poitiers University Hospital, Poitiers, France
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Ceelen W, Soreide K. Randomized controlled trials and alternative study designs in surgical oncology. EUROPEAN JOURNAL OF SURGICAL ONCOLOGY 2023; 49:1331-1340. [PMID: 36964056 DOI: 10.1016/j.ejso.2023.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 02/17/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023]
Abstract
Surgery is central to the cure of most solid cancers and an integral part of modern multimodal cancer management for early and advanced stage cancers. Decisions made by surgeons and multidisciplinary team members are based on best available knowledge for the defined clinical situation at hand. While surgery is both an art and a science, good decision-making requires data that are robust, valid, representative and, applicable to most if not all patients with a specific cancer. Such data largely comes from clinical observations and registries, and more preferably from trials conducted with the specific purpose of arriving at new answers. As part of the ESSO core curriculum development an increased focus has been put on the need to enhance research literacy among surgical candidates. As an expansion of the curriculum catalogue list and to enhance the educational value, we here present a set of principles and emerging concepts which applies to surgical oncologist for reading, understanding, planning and contributing to future surgeon-led cancer trials.
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Affiliation(s)
- Wim Ceelen
- Department of GI Surgery, Ghent University Hospital, Ghent, Belgium; Department of Human Structure and Repair, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium; Cancer Research Institute Ghent (CRIG), Ghent, Belgium.
| | - Kjetil Soreide
- Department of Gastrointestinal Surgery, Stavanger University Hospital, Stavanger, Norway; Department of Clinical Medicine, University of Bergen, Bergen, Norway; SAFER Surgery, Surgical Research Unit, Stavanger University Hospital, Stavanger, Norway.
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Rufibach K, Grinsted L, Li J, Weber HJ, Zheng C, Zhou J. Quantification of follow-up time in oncology clinical trials with a time-to-event endpoint: Asking the right questions. Pharm Stat 2023; 22:671-691. [PMID: 36970778 DOI: 10.1002/pst.2300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 07/20/2023]
Abstract
For the analysis of a time-to-event endpoint in a single-arm or randomized clinical trial it is generally perceived that interpretation of a given estimate of the survival function, or the comparison between two groups, hinges on some quantification of the amount of follow-up. Typically, a median of some loosely defined quantity is reported. However, whatever median is reported, is typically not answering the question(s) trialists actually have in terms of follow-up quantification. In this paper, inspired by the estimand framework, we formulate a comprehensive list of relevant scientific questions that trialists have when reporting time-to-event data. We illustrate how these questions should be answered, and that reference to an unclearly defined follow-up quantity is not needed at all. In drug development, key decisions are made based on randomized controlled trials, and we therefore also discuss relevant scientific questions not only when looking at a time-to-event endpoint in one group, but also for comparisons. We find that different thinking about some of the relevant scientific questions around follow-up is required depending on whether a proportional hazards assumption can be made or other patterns of survival functions are anticipated, for example, delayed separation, crossing survival functions, or the potential for cure. We conclude the paper with practical recommendations.
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Affiliation(s)
- Kaspar Rufibach
- Methods, Collaboration, and Outreach Group (MCO), Product Development Data Sciences, Hoffmann-La Roche Ltd, Basel, Switzerland
| | | | - Jiang Li
- BeiGene USA, Inc., 55 Challenger Road, Ridgefield Park, New Jersey, 07660, USA
| | - Hans Jochen Weber
- Clinical Development and Analytics, Novartis Pharma AG, Basel, Switzerland
| | - Cheng Zheng
- Zentalis Pharmaceuticals, New York, New York, USA
| | - Jiangxiu Zhou
- Statistics and Decision Sciences, J&J, Spring House, Pennsylvania, USA
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Möllenhoff K, Tresch A. Investigating non-inferiority or equivalence in time-to-event data under non-proportional hazards. LIFETIME DATA ANALYSIS 2023; 29:483-507. [PMID: 36708450 DOI: 10.1007/s10985-023-09589-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Accepted: 01/10/2023] [Indexed: 06/13/2023]
Abstract
The classical approach to analyze time-to-event data, e.g. in clinical trials, is to fit Kaplan-Meier curves yielding the treatment effect as the hazard ratio between treatment groups. Afterwards, a log-rank test is commonly performed to investigate whether there is a difference in survival or, depending on additional covariates, a Cox proportional hazard model is used. However, in numerous trials these approaches fail due to the presence of non-proportional hazards, resulting in difficulties of interpreting the hazard ratio and a loss of power. When considering equivalence or non-inferiority trials, the commonly performed log-rank based tests are similarly affected by a violation of this assumption. Here we propose a parametric framework to assess equivalence or non-inferiority for survival data. We derive pointwise confidence bands for both, the hazard ratio and the difference of the survival curves. Further we propose a test procedure addressing non-inferiority and equivalence by directly comparing the survival functions at certain time points or over an entire range of time. Once the model's suitability is proven the method provides a noticeable power benefit, irrespectively of the shape of the hazard ratio. On the other hand, model selection should be carried out carefully as misspecification may cause type I error inflation in some situations. We investigate the robustness and demonstrate the advantages and disadvantages of the proposed methods by means of a simulation study. Finally, we demonstrate the validity of the methods by a clinical trial example.
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Affiliation(s)
- Kathrin Möllenhoff
- Mathematical Institute, Heinrich Heine University, 40225, Düsseldorf, Germany.
| | - Achim Tresch
- Institute of Medical Statistics and Computational Biology, Faculty of Medicine, University of Cologne, Cologne, Germany
- CEDAD, University of Cologne, Cologne, Germany
- Center for Data and Simulation Science, University of Cologne, Cologne, Germany
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Bertoglio L, Melloni A, Bugna C, Grignani C, Bucci D, Foglia E, Chiesa R, Odone A. In-hospital cost-effectiveness analysis of open versus staged fenestrated/branched endovascular elective repair of thoracoabdominal aneurysms. J Vasc Surg 2023:S0741-5214(23)01034-0. [PMID: 37076108 DOI: 10.1016/j.jvs.2023.03.503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/07/2023] [Accepted: 03/09/2023] [Indexed: 04/21/2023]
Abstract
OBJECTIVE To compare costs and effectiveness of elective open (OR) versus fenestrated/branched endovascular (ER) repair of thoracoabdominal aneurysms (TAAA) in a high-volume center. METHODS This single-center retrospective observational study (PRO-ENDO TAAA Study, NCT05266781) was designed as part of a larger Health Technology Assessment analysis. All electively treated TAAAs between 2013 and 2021 were analyzed and propensity-matched. Endpoints were clinical success, major adverse events (MAE), hospital direct costs, and freedom from all causes and aneurysm-related mortality and reinterventions. Risk factors and outcomes were homogeneously classified according to the Society of Vascular Surgery reporting standards. Cost-effectiveness value (CEV) and Incremental Cost-Effectiveness Ratio (ICER) were calculated, considering the absence of MAEs as a measure of effectiveness. RESULTS Propensity matching identified 102 pairs of patients out of 789 TAAAs. Mortality, MAE, permanent spinal cord ischemia rates, respiratory complications, cardiac complications, and renal injury were higher for OR (13% vs 5%, p=.048; 60% vs 17%, p<.001; 10% vs 3%, p=.045; 91% vs 18%, p<.001; 16% vs 6%, p=.024; 27% vs 6%, p<.001; respectively). Access complication rate (6% vs 27%; p<.001) was higher in the ER group. Intensive Care Unit stay was longer (p<.001) for OR and ER patients were discharged home more frequently (3% vs 94%; p<.001). No differences in mid-term endpoints were observed at 2 years. Despite ER reducing all the hospital cost items (-42% to -88%, p<.001), the higher expenses (p<.001) of the endovascular devices increased the overall cost of ER by 80%. CEV for ER was favorable to OR (56 365 vs 64 903 €/patient) with an ICER of 48 409 € per MAE saved. CONCLUSIONS ER of TAAA reduces perioperative mortality and morbidity compared to OR, with no differences in reinterventions and survival rates at midterm follow-up. Despite the expenses for endovascular grafts, ER resulted more cost-effective in preventing MAEs.
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Affiliation(s)
- Luca Bertoglio
- Division of Vascular Surgery, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute, Milan, Italy.
| | - Andrea Melloni
- Division of Vascular Surgery, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Carlotta Bugna
- Division of Vascular Surgery, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Camilla Grignani
- Division of Vascular Surgery, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Daria Bucci
- School of Public Health, Vita-Salute San Raffaele University, Milan, Italy
| | - Emanuela Foglia
- School of Industrial Engineering, Carlo Cattaneo - LIUC University and LIUC Business School, Castellanza, Italy
| | - Roberto Chiesa
- Division of Vascular Surgery, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Anna Odone
- Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy
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Dormuth I, Liu T, Xu J, Pauly M, Ditzhaus M. A comparative study to alternatives to the log-rank test. Contemp Clin Trials 2023; 128:107165. [PMID: 36972865 DOI: 10.1016/j.cct.2023.107165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 03/17/2023] [Accepted: 03/20/2023] [Indexed: 03/29/2023]
Abstract
BACKGROUND Studies to compare the survival of two or more groups using time-to-event data are of high importance in medical research. The gold standard is the log-rank test, which is optimal under proportional hazards. As the latter is no simple regularity assumption, we are interested in evaluating the power of various statistical tests under different settings including proportional and non-proportional hazards with a special emphasis on crossing hazards. This challenge has been going on for many years now and multiple methods have already been investigated in extensive simulation studies. However, in recent years new omnibus tests and methods based on the restricted mean survival time appeared that have been strongly recommended in biometric literature. METHODS Thus, to give updated recommendations, we perform a vast simulation study to compare tests that showed high power in previous studies with these more recent approaches. We thereby analyze various simulation settings with varying survival and censoring distributions, unequal censoring between groups, small sample sizes and unbalanced group sizes. RESULTS Overall, omnibus tests are more robust in terms of power against deviations from the proportional hazards assumption. CONCLUSION We recommend considering the more robust omnibus approaches for group comparison in case of uncertainty about the underlying survival time distributions.
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Affiliation(s)
- Ina Dormuth
- Department of Statistics, TU Dortmund University, Dortmund, Germany.
| | - Tiantian Liu
- Technion - Israel Institute of Technology, Haifa, Israel
| | - Jin Xu
- East China Normal University, Shanghai, China
| | - Markus Pauly
- Department of Statistics, TU Dortmund University, Dortmund, Germany; Research Center Trustworthy Data Science and Security, UA Ruhr, Dortmund, Germany
| | - Marc Ditzhaus
- Department of Mathematics, Otto von Guericke University Magdeburg, Magdeburg, Germany
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18
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Patel AP. Use of Daratumumab in Patients With Previously Treated Multiple Myeloma. J Clin Oncol 2023; 41:2668. [PMID: 36940403 DOI: 10.1200/jco.22.02850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023] Open
Affiliation(s)
- Ashwin P Patel
- Ashwin P. Patel, MBBS, PhD, Emory University School of Medicine, Atlanta, GA
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Chu C, Liu D, Wang D, Hu S, Zhang Y. Identification and development of TP53 mutation-associated Long non-coding RNAs signature for optimized prognosis assessment and treatment selection in hepatocellular carcinoma. Int J Immunopathol Pharmacol 2023; 37:3946320231211795. [PMID: 37942552 PMCID: PMC10637161 DOI: 10.1177/03946320231211795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 10/17/2023] [Indexed: 11/10/2023] Open
Abstract
BACKGROUND The TP53 gene is estimated to be mutated in over 50% of tumors, with the majority of tumors exhibiting abnormal TP53 signaling pathways. However, the exploration of TP53 mutation-related LncRNAs in Hepatocellular carcinoma (HCC) remains incomplete. This study aims to identify such LncRNAs and enhance the prognostic accuracy for Hepatoma patients. MATERIAL AND METHODS Differential gene expression was identified using the "limma" package in R. Prognosis-related LncRNAs were identified via univariate Cox regression analysis, while a prognostic model was crafted using multivariate Cox regression analysis. Survival analysis was conducted using Kaplan-Meier curves. The precision of the prognostic model was assessed through ROC analysis. Subsequently, the Tumor Immune Dysfunction and Exclusion (TIDE) algorithm were executed on the TCGA dataset via the TIDE database. Fractions of 24 types of immune cell infiltration were obtained from NCI Cancer Research Data Commons using deconvolution techniques. The protein expression levels encoded by specific genes were obtained through the TPCA database. RESULTS In this research, we have identified 85 LncRNAs associated with TP53 mutations and developed a corresponding signature referred to as TP53MLncSig. Kaplan-Meier analysis revealed a lower 3-year survival rate in high-risk patients (46.9%) compared to low-risk patients (74.2%). The accuracy of the prognostic TP53MLncSig was further evaluated by calculating the area under the ROC curve. The analysis yielded a 5-year ROC score of 0.793, confirming its effectiveness. Furthermore, a higher score for TP53MLncSig was found to be associated with an increased response rate to immune checkpoint blocker (ICB) therapy (p = .005). Patients possessing high-risk classification exhibited lower levels of P53 protein expression and higher levels of genomic instability. CONCLUSION The present study aimed to identify and validate LncRNAs associated with TP53 mutations. We constructed a prognostic model that can predict chemosensitivity and response to ICB therapy in HCC patients. This novel approach sheds light on the role of LncRNAs in TP53 mutation and provides valuable resources for analyzing patient prognosis and treatment selection.
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Affiliation(s)
- Chenghao Chu
- Department of General Surgery, Anqing First People's Hospital Affiliated to Anhui Medical University, Anqing, China
- Department of Biomedical Sciences, Faculty of Medicine & Health Sciences, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
| | - Daoli Liu
- Department of General Surgery, Anqing First People's Hospital Affiliated to Anhui Medical University, Anqing, China
| | - Duofa Wang
- Department of General Surgery, Anqing First People's Hospital Affiliated to Anhui Medical University, Anqing, China
| | - Shuangjiu Hu
- Department of General Surgery, Anqing First People's Hospital Affiliated to Anhui Medical University, Anqing, China
| | - Yongwei Zhang
- Department of General Surgery, Anqing First People's Hospital Affiliated to Anhui Medical University, Anqing, China
- Department of Biomedical Sciences, Faculty of Medicine & Health Sciences, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia
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Kawada T. Re: Wang L, Swerdel JN, Weaver J, et al. Incidence rate of hospitalization and mortality in the first year following initial diagnosis of cardiac amyloidosis in the US claims databases. Curr Med Res Opin. 2021;37(8):1275-1281. Curr Med Res Opin 2022; 38:1683. [PMID: 35916337 DOI: 10.1080/03007995.2022.2108617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Tomoyuki Kawada
- Department of Hygiene and Public Health, Nippon Medical School, Bunkyo-Ku, Tokyo, Japan
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