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Kereiakes DJ, Ellis SG, Metzger DC, Caputo RP, Rizik DG, Teirstein PS, Litt MR, Kini A, Kabour A, Marx SO, Popma JJ, Tan SH, Ediebah DE, Simonton C, Stone GW. Clinical Outcomes Before and After Complete Everolimus-Eluting Bioresorbable Scaffold Resorption: Five-Year Follow-Up From the ABSORB III Trial. Circulation 2019; 140:1895-1903. [PMID: 31553222 DOI: 10.1161/circulationaha.119.042584] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND The Absorb everolimus-eluting bioresorbable vascular scaffold (BVS) provides early drug delivery and mechanical support similar to those of metallic drug-eluting stents, followed by complete resorption in ≈3 years with recovery of vascular structure and function. The ABSORB III trial demonstrated noninferior rates of target lesion failure (cardiac death, target vessel myocardial infarction, or ischemia-driven target lesion revascularization) at 1 year with BVS compared with cobalt chromium everolimus-eluting stents. Between 1 and 3 years and cumulative to 3 years, adverse event rates (particularly target vessel myocardial infarction and scaffold thrombosis) were increased after BVS. We sought to assess clinical outcomes after BVS through 5 years, including beyond the 3-year time point of complete scaffold resorption. METHODS Clinical outcomes from ABSORB III were analyzed by randomized device (intention to treat) cumulative to 5 years and between 3 and 5 years. RESULTS Rates of target lesion failure, target vessel myocardial infarction, and scaffold thrombosis were increased through the 5-year follow-up with BVS compared with everolimus-eluting stents. However, between 3 and 5 years, reductions in the relative hazards of the BVS compared with everolimus-eluting stents were observed, particularly for target lesion failure (hazard ratio, 0.83 [95% CI, 0.55-1.24] versus 1.35 [95% CI, 1.02-1.78]; Pint=0.052) and scaffold thrombosis (hazard ratio, 0.26 [95% CI, 0.02-2.87] versus 3.23 [95% CI, 1.25-8.30]; Pint=0.056) compared with the 0- to 3-year time period. CONCLUSIONS In the ABSORB III trial, cumulative 5-year adverse event rates were increased after BVS compared with everolimus-eluting stents. However, the period of excess risk for BVS ended at 3 years, coincident with complete scaffold resorption. CLINICAL TRIAL REGISTRATION URL: https://clinicaltrials.gov. Unique identifier: NCT01751906.
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Affiliation(s)
- Dean J Kereiakes
- The Christ Hospital Heart and Vascular Center, Lindner Research Center, Cincinnati, OH (D.J.K.)
| | | | | | | | | | | | - Marc R Litt
- Baptist Medical Center, Jacksonville, FL (M.R.L.)
| | | | - Ameer Kabour
- Mercy St. Vincent's Medical Center, Toledo, OH (A. Kabour)
| | - Steven O Marx
- New York Presbyterian Hospital, Columbia University Medical Center and the Cardiovascular Research Foundation (S.O.M., G.W.S.)
| | | | - Siok Hwee Tan
- Abbott Vascular, Santa Clara, CA (S.H.T., D.E.E., C.S.)
| | | | | | - Gregg W Stone
- New York Presbyterian Hospital, Columbia University Medical Center and the Cardiovascular Research Foundation (S.O.M., G.W.S.)
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Ediebah DE, Quinten C, Coens C, Ringash J, Dancey J, Zikos E, Gotay C, Brundage M, Tu D, Flechtner H, Greimel E, Reeve BB, Taphoorn M, Reijneveld J, Dirven L, Bottomley A. Quality of life as a prognostic indicator of survival: A pooled analysis of individual patient data from canadian cancer trials group clinical trials. Cancer 2018; 124:3409-3416. [DOI: 10.1002/cncr.31556] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 03/08/2018] [Accepted: 03/28/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Divine E. Ediebah
- Quality of Life Department, European Organization for Research and Treatment of CancerBrussels Belgium
- Department of Neurology and Brain Tumor Center AmsterdamVU University Medical CenterAmsterdam the Netherlands
| | - Chantal Quinten
- Epidemiological Methods Section, Surveillance and Response Support Unit, European Center for Disease Prevention and ControlStockholm Sweden
| | - Corneel Coens
- Quality of Life Department, European Organization for Research and Treatment of CancerBrussels Belgium
| | - Jolie Ringash
- Princess Margaret Cancer CentreUniversity of TorontoToronto Ontario Canada
- Canadian Cancer Trials GroupKingston Ontario Canada
| | - Janet Dancey
- Canadian Cancer Trials GroupKingston Ontario Canada
- Queen's UniversityKingston Ontario Canada
| | - Efstathios Zikos
- Quality of Life Department, European Organization for Research and Treatment of CancerBrussels Belgium
| | - Carolyn Gotay
- Canadian Cancer Trials GroupKingston Ontario Canada
- School of Population and Public HealthUniversity of British ColumbiaVancouver British Columbia Canada
| | - Michael Brundage
- Canadian Cancer Trials GroupKingston Ontario Canada
- Queen's UniversityKingston Ontario Canada
- Cancer Centre of Southeastern Ontario, Kingston General HospitalKingston Ontario Canada
| | - Dongsheng Tu
- Canadian Cancer Trials GroupKingston Ontario Canada
| | | | - Eva Greimel
- Obstetrics and GynecologyMedical University GrazGraz Austria
| | - Bryce B. Reeve
- Center for Health ManagementDuke University School of MedicineDurham North Carolina
- Department of Population Health SciencesDuke University School of MedicineDurham North Carolina
- Department of PediatricsDuke University School of MedicineDurham North Carolina
| | - Martin Taphoorn
- Department of NeurologyLeiden University Medical CenterLeiden the Netherlands
- Neurology, Haaglanden Medical Centerthe Hague the Netherlands
| | - Jaap Reijneveld
- Department of NeurologyLeiden University Medical CenterLeiden the Netherlands
- Department of NeurologyAcademic Medical CenterAmsterdam the Netherlands
| | - Linda Dirven
- Department of NeurologyLeiden University Medical CenterLeiden the Netherlands
- Neurology, Haaglanden Medical Centerthe Hague the Netherlands
| | - Andrew Bottomley
- Quality of Life Department, European Organization for Research and Treatment of CancerBrussels Belgium
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Ediebah DE, Reijneveld JC, Taphoorn MJB, Coens C, Zikos E, Aaronson NK, Heimans JJ, Bottomley A, Klein M. Impact of neurocognitive deficits on patient-proxy agreement regarding health-related quality of life in low-grade glioma patients. Qual Life Res 2016; 26:869-880. [PMID: 27744512 PMCID: PMC5334398 DOI: 10.1007/s11136-016-1426-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2016] [Indexed: 12/31/2022]
Abstract
PURPOSE Clinical trials in glioma patients with neurocognitive deficits face challenges due to lacking or unreliable patient self-reports on their health-related quality of life (HRQOL). Patient-proxy data could help solve this issue. We determined whether patient-proxy concordance levels were affected by patients' neurocognitive functioning. METHODS Patient and patient-by-proxy HRQOL ratings were assessed via SF-36 and EORTC QLQ-BN20, respectively, in 246 patients. Data on neurocognitive functioning were collected on a subgroup of 195 patients. Patient-proxy agreement was measured using the Bland-Altman limit of agreement, the mean difference, the concordance correlation coefficient (CCC), and the percentage difference (PD, ±0, 5, or 10 points). We defined patients to be cognitively impaired (n = 66) or cognitively intact (n = 129) based on their neurocognitive performance. RESULTS Patients rated their physical function and general health to be better than their proxies did, while at the same time, patients reported more visual disorders, communication deficits, itchy skin, and problems with bladder control. The cognitively impaired subgroup reported poorer physical functioning, more visual disorders, headaches, itchy skin, and issues with bladder control. In the cognitively intact group, no statistical significant differences were observed between patients and proxies. Not surprisingly, Bland-Altman plots revealed a high agreement between the patient and patient-by-proxy rating in all HRQOL domains ranging from 95 to 99 %. The CCC was fairly high in all HRQOL domains (0.37-0.80), and the percentage of perfect agreement (PD ± 0) ranged from 8.5 to 76.8 %. In the cognitively impaired patients, the mean difference between patients and proxies was overall larger, and accordingly, agreement based on Bland-Altman plots was lower. CONCLUSIONS The level of agreement between patient and patient-by-proxy ratings of low-grade glioma patients' HRQOL is generally high. However, patient-proxy agreement is lower in patients with neurocognitive deficits than in patients without neurocognitive deficits.
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Affiliation(s)
- Divine E Ediebah
- Quality of Life Department, European Organisation for Research and Treatment of Cancer (EORTC), Brussels, Belgium
| | - Jaap C Reijneveld
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands
| | - Martin J B Taphoorn
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands.,Department of Neurology, Medical Center Haaglanden, The Hague, The Netherlands
| | - Corneel Coens
- Quality of Life Department, European Organisation for Research and Treatment of Cancer (EORTC), Brussels, Belgium
| | - Efstathios Zikos
- Quality of Life Department, European Organisation for Research and Treatment of Cancer (EORTC), Brussels, Belgium
| | - Neil K Aaronson
- Division of Psychosocial Research and Epidemiology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Jan J Heimans
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands
| | - Andrew Bottomley
- Quality of Life Department, European Organisation for Research and Treatment of Cancer (EORTC), Brussels, Belgium
| | - Martin Klein
- Department of Medical Psychology - B7D349, VU University Medical Center, Van der Boechorststraat 7, 1081 BT, Amsterdam, The Netherlands.
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Zikos E, Coens C, Quinten C, Ediebah DE, Martinelli F, Ghislain I, King MT, Gotay C, Ringash J, Velikova G, Reeve BB, Greimel E, Cleeland CS, Flechtner H, Taphoorn MJB, Weis J, Schmucker-von Koch J, Sprangers MAG, Bottomley A. The Added Value of Analyzing Pooled Health-Related Quality of Life Data: A Review of the EORTC PROBE Initiative. J Natl Cancer Inst 2015; 108:djv391. [DOI: 10.1093/jnci/djv391] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 11/20/2015] [Indexed: 11/15/2022] Open
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Quinten C, Coens C, Ghislain I, Zikos E, Sprangers MA, Ringash J, Martinelli F, Ediebah DE, Maringwa J, Reeve BB, Greimel E, King MT, Bjordal K, Flechtner HH, Schmucker-Von Koch J, Taphoorn MJ, Weis J, Wildiers H, Velikova G, Bottomley A. The effects of age on health-related quality of life in cancer populations: A pooled analysis of randomized controlled trials using the European Organisation for Research and Treatment of Cancer (EORTC) QLQ-C30 involving 6024 cancer patients. Eur J Cancer 2015; 51:2808-19. [DOI: 10.1016/j.ejca.2015.08.027] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 08/29/2015] [Indexed: 11/26/2022]
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Serruys PW, Onuma Y, Van Geuns RJ, De Bruyne B, Dudek D, Christiansen EH, Chevalier B, Smits PC, McCLean D, Koolen J, Windecker S, Whitbourn RJ, Meredith IT, Wasungu L, Ediebah DE, Veldhof S, Ormiston JA. TCT-11 Five-year Follow up of the First in Man use of a Polylactide Bioresorbable Scaffold Eluting Everolimus for Treatment of Coronary Stenosis; A Serial Multi-Imaging Modality Study. J Am Coll Cardiol 2015. [DOI: 10.1016/j.jacc.2015.08.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ediebah DE, Coens C, Zikos E, Quinten C, Ringash J, King MT, Schmucker von Koch J, Gotay C, Greimel E, Flechtner H, Weis J, Reeve BB, Smit EF, Taphoorn MJB, Bottomley A. Does change in health-related quality of life score predict survival? Analysis of EORTC 08975 lung cancer trial. Br J Cancer 2014; 110:2427-33. [PMID: 24743709 PMCID: PMC4021536 DOI: 10.1038/bjc.2014.208] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 03/19/2014] [Accepted: 03/24/2014] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Little is known about whether changes in health-related quality of life (HRQoL) scores from baseline during treatment also predict survival, which we aim to investigate in this study. METHODS We analysed data from 391 advanced non-small-cell lung cancer (NSCLC) patients enrolled in the EORTC 08975 study, which compared palliative chemotherapy regimens. HRQoL was assessed at baseline and after each chemotherapy cycle using the EORTC QLQ-C30 and QLQ-LC13. The prognostic significance of HRQoL scores at baseline and their changes over time was assessed with Cox regression, after adjusting for clinical and socio-demographic variables. RESULTS After controlling for covariates, every 10-point increase in baseline pain and dysphagia was associated with 11% and 12% increased risk of death with hazard ratios (HRs) of 1.11 and 1.12, respectively. Every 10-point improvement of physical function at baseline (HR=0.93) was associated with 7% lower risk of death. Every 10-point increase in pain (HR=1.08) was associated with 8% increased risk of death at cycle 1. Every 10-point increase in social function (HR=0.91) at cycle 2 was associated with 9% lower risk of death. CONCLUSIONS Our findings suggest that changes in HRQoL scores from baseline during treatment, as measured on subscales of the EORTC QLQ-C30 and QLQ-LC13, are significant prognostic factors for survival.
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Affiliation(s)
- D E Ediebah
- Quality of Life Department, European Organisation for Research and Treatment of Cancer, Avenue Mounier, 83 b11, 1200 Brussels, Belgium
| | - C Coens
- Quality of Life Department, European Organisation for Research and Treatment of Cancer, Avenue Mounier, 83 b11, 1200 Brussels, Belgium
| | - E Zikos
- Quality of Life Department, European Organisation for Research and Treatment of Cancer, Avenue Mounier, 83 b11, 1200 Brussels, Belgium
| | - C Quinten
- Quality of Life Department, European Organisation for Research and Treatment of Cancer, Avenue Mounier, 83 b11, 1200 Brussels, Belgium
- Department of Biostatistics, European Centre for Disease Prevention and Control, Surveillance and Response Support Unit, Tomtebodavägen 11a, 171 83 Stockholm, Sweden
| | - J Ringash
- Department of Radiation Oncology, The Princess Margaret Hospital and the University of Toronto, 610 University Avenue, Toronto, Ontario, Canada M5G 2M9
| | - M T King
- Department of Psychology, Psycho-oncology Co-operative Research Group (PoCoG), The University of Sydney, Sydney, New South Wales NSW 2006, Australia
| | - J Schmucker von Koch
- Department of Ethics, University of Regensburg, Medical Ethics, Universitaetsstrasse 31, D-93040 Regensburg, Germany
| | - C Gotay
- School of Population and Public Health, University of British Columbia, Room 162—2206 East Mall, Vancouver, British Columbia, Canada BC V6T 1Z3
| | - E Greimel
- Department of Obstetrics and Gynecology, Medical University Graz, Auenbruggerplatz 14, AT 8036 Graz, Austria
| | - H Flechtner
- Department of Child and Adolescent Psychiatry, University Magdeburg, Leipziger Str 44, 39120 Magdeburg, Germany
| | - J Weis
- Psychosocial Department, Tumor Biology Center at the University of Freiburg, Breisacher Str. 117, 79106 Freiburg, Germany
| | - B B Reeve
- Department of Health Policy and Management, University of North Carolina at Chapel Hill, 1101-D McGavran-Greenberg Building Chapel Hill, Chapel Hill, NC 27599, USA
| | - E F Smit
- Department of Pulmonology, VU University Medical Centre, PO Box 7057, 1007 MB Amsterdam, The Netherlands
| | - M J B Taphoorn
- Department of Neurology, VU University Medical Center/Medical Center Haaglanden 2501 CK, The Hague, The Netherlands
| | - A Bottomley
- Quality of Life Department, European Organisation for Research and Treatment of Cancer, Avenue Mounier, 83 b11, 1200 Brussels, Belgium
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Zikos E, Ghislain I, Coens C, Ediebah DE, Sloan E, Quinten C, Koller M, van Meerbeeck JP, Flechtner HH, Stupp R, Pallis A, Czimbalmos A, Sprangers MAG, Bottomley A. Health-related quality of life in small-cell lung cancer: a systematic review on reporting of methods and clinical issues in randomised controlled trials. Lancet Oncol 2014; 15:e78-89. [PMID: 24480558 DOI: 10.1016/s1470-2045(13)70493-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Small-cell lung cancer represents about 15% of all lung cancers; increasingly, randomised controlled trials of this disease measure the health-related quality of life of patients. In this Systematic Review we assess the adequacy of reporting of health-related quality-of-life methods in randomised controlled trials of small-cell lung cancer, and the potential effect of this reporting on clinical decision making. Although overall reporting of health-related quality of life was acceptable, improvements are needed to optimise the use of health-related quality of life in randomised controlled trials.
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Affiliation(s)
- Efstathios Zikos
- Quality of Life Department, EORTC Headquarters, Brussels, Belgium.
| | - Irina Ghislain
- Quality of Life Department, EORTC Headquarters, Brussels, Belgium
| | - Corneel Coens
- Quality of Life Department, EORTC Headquarters, Brussels, Belgium
| | - Divine E Ediebah
- Quality of Life Department, EORTC Headquarters, Brussels, Belgium
| | - Elizabeth Sloan
- New England Center for Children, Southborough, Massachusetts, MA, USA
| | - Chantal Quinten
- European Centre for Disease Prevention and Control, Surveillance and Response Support Unit, Stockholm, Sweden
| | - Michael Koller
- University Hospital Regensburg, Center for Clinical Studies, Regensburg, Germany
| | - Jan P van Meerbeeck
- Multidisciplinary Oncology Centre Antwerp (MOCA)/Thoracic Oncology, Antwerp University Hospital, Edegem, Belgium
| | - Hans-Henning Flechtner
- University of Magdeburg, Child and Adolescent Psychiatry and Psychotherapy, Magdeburg, Germany
| | - Roger Stupp
- Department of Oncology and Cancer Center, University Hospital Zurich, Zurich, Switzerland
| | - Athanasios Pallis
- Clinical Research Physicians Unit, EORTC Headquarters, Brussels, Belgium
| | | | - Mirjam A G Sprangers
- Department of Medical Psychology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Andrew Bottomley
- Quality of Life Department, EORTC Headquarters, Brussels, Belgium
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Quinten C, Martinelli F, Coens C, Sprangers MAG, Ringash J, Gotay C, Bjordal K, Greimel E, Reeve BB, Maringwa J, Ediebah DE, Zikos E, King MT, Osoba D, Taphoorn MJ, Flechtner H, Schmucker-Von Koch J, Weis J, Bottomley A. A global analysis of multitrial data investigating quality of life and symptoms as prognostic factors for survival in different tumor sites. Cancer 2013; 120:302-11. [PMID: 24127333 DOI: 10.1002/cncr.28382] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 07/04/2013] [Accepted: 08/02/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Chantal Quinten
- Quality of Life Department; European Organization for Research and Treatment of Cancer Headquarters; Brussels Belgium
| | - Francesca Martinelli
- Quality of Life Department; European Organization for Research and Treatment of Cancer Headquarters; Brussels Belgium
| | - Corneel Coens
- Quality of Life Department; European Organization for Research and Treatment of Cancer Headquarters; Brussels Belgium
| | | | - Jolie Ringash
- Department of Radiation Oncology, The Princess Margaret Hospital; University of Toronto; Toronto Ontario Canada
| | - Carolyn Gotay
- School of Population and Public Health; University of British Columbia; British Columbia Cancer Research Center; Vancouver British Columbia Canada
| | - Kristin Bjordal
- Oslo University Hospital; Department of Oncology, Norwegian Radium Hospital; Oslo Norway
| | - Eva Greimel
- Obstetrics and Gynecology; Medical University Graz; Graz Austria
| | - Bryce B. Reeve
- Department of Health Policy and Management; University of North Carolina; Chapel Hill North Carolina
| | - John Maringwa
- Quality of Life Department; European Organization for Research and Treatment of Cancer Headquarters; Brussels Belgium
| | - Divine E. Ediebah
- Quality of Life Department; European Organization for Research and Treatment of Cancer Headquarters; Brussels Belgium
| | - Efstathios Zikos
- Quality of Life Department; European Organization for Research and Treatment of Cancer Headquarters; Brussels Belgium
| | - Madeleine T. King
- Psycho-Oncology Cooperative Research Group; University of Sydney; Sydney New South Wales Australia
| | - David Osoba
- Quality of Life Consulting; West Vancouver British Columbia Canada
| | - Martin J. Taphoorn
- VU Medical Center/Medical Center Haaglanden; Amsterdam/the Hague Netherlands
| | - Henning Flechtner
- Child and Adolescent Psychiatry and Psychotherapy; University of Magdeburg; Magdeburg Germany
| | | | - Joachim Weis
- Tumorbiology Center at the Department of Psycho-oncology; University of Freiburg; Freiburg Germany
| | - Andrew Bottomley
- Quality of Life Department; European Organization for Research and Treatment of Cancer Headquarters; Brussels Belgium
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Ediebah DE, Coens C, Maringwa JT, Quinten C, Zikos E, Ringash J, King M, Gotay C, Flechtner HH, Schmucker von Koch J, Weis J, Smit EF, Köhne CH, Bottomley A. Effect of completion-time windows in the analysis of health-related quality of life outcomes in cancer patients. Ann Oncol 2012; 24:231-7. [PMID: 22935549 DOI: 10.1093/annonc/mds220] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND We examined if cancer patients' health-related quality of life (HRQoL) scores on the European Organisation for Research and Treatment of Cancer (EORTC) QLQ-C30 are affected by the specific time point, before or during treatment, at which the questionnaire is completed, and whether this could bias the overall treatment comparison analyses. PATIENTS AND METHODS A 'completion-time window' variable was created on three closed EORTC randomised control trials in lung (non-small cell lung cancer, NSCLC) and colorectal cancer (CRC) to indicate when the QLQ-30 was completed relative to chemotherapy cycle dates, defined as 'before', 'on' and 'after'. HRQoL mean scores were calculated using a linear mixed model. RESULTS Statistically significant differences (P<0.05) were observed on 6 and 5 scales for 'on' and 'after' comparisons in the NSCLC and two-group CRC trial, respectively. As for the three-group CRC trial, several statistical differences were observed in the 'before' to 'on' and the 'on' to 'after' comparisons. For all three trials, including the 'completion-time window' variable in the model resulted in a better fit, but no substantial changes in the treatment effects were noted. CONCLUSIONS We showed that considering the exact timing of completion within specified windows resulted in statistical and potentially clinically significant differences, but it did not alter the conclusions of treatment comparison in these studies.
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Affiliation(s)
- D E Ediebah
- Department of Quality of Life, European Organisation for Research and Treatment of Cancer Headquarters (EORTC HQ), Brussels, Belgium.
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