47 results on '"Kalkman S"'
Search Results
2. Context-Relative Norms Determine the Appropriate Type of Consent in Clinical Biobanks: Towards a Potential Solution for the Discrepancy between the General Data Protection Regulation and the European Data Protection Board on Requirements for Consent
- Author
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Indrakusuma, R., Kalkman, S., Koelemay, M. J. W., Balm, R., and Willems, D. L.
- Published
- 2020
- Full Text
- View/download PDF
3. Responsible data sharing in a big data-driven translational research platform: lessons learned
- Author
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Kalkman, S., Mostert, M., Udo-Beauvisage, N., van Delden, J. J., and van Thiel, G. J.
- Published
- 2019
- Full Text
- View/download PDF
4. The case for screening in early life for 'non-treatable' disorders: ethics, evidence and proportionality. A report from the Health Council of the Netherlands
- Author
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Kalkman, S., Dondorp, W., Kalkman, S., and Dondorp, W.
- Abstract
In the Netherlands, the call to add 'non-treatable' disorders to the newborn bloodspot screening programme has found a sympathetic ear with the Government. In 2019, the Health Council of the Netherlands was formally asked for advice on the conditions under which bloodspot screening for such disorders might be offered. Here we present the reasoning and the recommendations of the resulting report, and briefly discuss its reception. The report holds on to the classical view that screening must benefit the child, but argues for a wider account of child benefit than only in terms of substantial health gains. However, screening for 'non-treatable' disorders would still require evidence of a favourable benefits to harm ratio. The report presents a framework for such screening, but concludes that apart perhaps from Duchenne Muscular Dystrophy (DMD), no or only very few 'non-treatable' disorders would at present meet its criteria. Setting up a screening programme that might benefit only a small percentage of families struggling with uncertainty about their child's diagnosis would not seem proportional. Instead, the Government is advised to invest in a better infrastructure for early referral, testing and care. The reaction to the report from proponents of such screening shows that the dividing line in the debate is not about whether screening neonates for 'non-treatable' disorders is acceptable in itself. It is rather whether such screening should be regarded as catering to a parental 'right to know', or as a public health service that should be subject to standards of evidence and proportionality.
- Published
- 2022
5. Community-based healthcare for migrants and refugees: A scoping literature review of best practices
- Author
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Riza, E. Kalkman, S. Coritsidis, A. Koubardas, S. Vassiliu, S. Lazarou, D. Karnaki, P. Zota, D. Kantzanou, M. Psaltopoulou, T. Linos, A.
- Abstract
Background: Strengthening community-based healthcare is a valuable strategy to reduce health inequalities and improve the integration of migrants and refugees into local communities in the European Union. However, little is known about how to effectively develop and run community-based healthcare models for migrants and refugees. Aiming at identifying the most-promising best practices, we performed a scoping review of the international academic literature into effective community-based healthcare models and interventions for migrants and refugees as part of the Mig-HealthCare project. Methods: A systematic search in PubMed, EMBASE, and Scopus databases was conducted in March 2018 following the PRISMA methodology. Data extraction from eligible publications included information on general study characteristics, a brief description of the intervention/model, and reported outcomes in terms of effectiveness and challenges. Subsequently, we critically assessed the available evidence per type of healthcare service according to specific criteria to establish a shortlist of the most promising best practices. Results: In total, 118 academic publications were critically reviewed and categorized in the thematic areas of mental health (n = 53), general health services (n = 36), noncommunicable diseases (n = 13), primary healthcare (n = 9), and women’s maternal and child health (n = 7). Conclusion: A set of 15 of the most-promising best practices and tools in community-based healthcare for migrants and refugees were identified that include several intervention approaches per thematic category. The elements of good communication, the linguistic barriers and the cultural differences, played crucial roles in the effective application of the interventions. The close collaboration of the various stakeholders, the local communities, the migrant/refugee communities, and the partnerships is a key element in the successful implementation of primary healthcare provision. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
- Published
- 2020
6. Best practices addressing healthcare care access of migrants and refugees in European countries
- Author
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Riza, E, primary, Kalkman, S, primary, Karnaki, P, primary, Zota, D, primary, Gil-Salmerón, A, primary, Durá-Ferrandis, E, primary, Garcés-Ferrer, J, primary, and Linos, A, primary
- Published
- 2019
- Full Text
- View/download PDF
7. Responsible data sharing in a big data-driven translational research platform: Lessons learned
- Author
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Medical Humanities Onderzoek Team 1, Circulatory Health, Global Public Health & Bioethics, Regenerative Medicine and Stem Cells, JC onderzoeksprogramma Methodologie, Kalkman, S., Mostert, M., Udo-Beauvisage, N., Van Delden, J. J., Van Thiel, G. J., Medical Humanities Onderzoek Team 1, Circulatory Health, Global Public Health & Bioethics, Regenerative Medicine and Stem Cells, JC onderzoeksprogramma Methodologie, Kalkman, S., Mostert, M., Udo-Beauvisage, N., Van Delden, J. J., and Van Thiel, G. J.
- Published
- 2019
8. Pragmatic randomized trials with new interventions : An ethical analysis
- Author
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Kalkman, S, van Delden, Hans, Grobbee, DE, van Thiel, GJMW, and University Utrecht
- Subjects
clinical trials ,research ethics ,real world evidence ,drug development - Abstract
Randomized controlled clinical trials (RCTs) are considered fundamental to the optimization of health care decision-making. Today, the drug development and evaluation process is dominated by so-called explanatory RCTs. Such RCTs are carried out in highly-controlled conditions to deliver the best evidence supporting market authorization of new pharmaceutical interventions. However, patients in explanatory phase III trials are very different from the actual patients who visit health care facilities in the context of “real world” clinical care. In the real world patients tend to be older, sicker and less keen on taking their medication. And what they care about is not necessarily bone density and systolic blood pressure, but rather whether the new drug keeps them out of the hospital. The focus on ‘ideal’ patients and situations means that for many patients it is uncertain whether a new drug on the market works better in real life than any of the other alternatives available. The misalignment between efficacy data (can the drug work?) and effectiveness data (does the drug work in real life) suggests that explanatory RCTs cannot do all the work. The collection of so-called “real world data” has been proposed to complement the evidence-base for making health care decisions. Pragmatic randomized trials are considered one of the strategies to obtain real world evidence. They contrast explanatory RCTs by question and design, since they aim to answer questions about the effectiveness of health interventions in routine care conditions. Recent calls have even gone out to design such trials already at the time of regulatory market approval of new interventions. Exploring ways to implement pragmatic trials in the process of drug development is a laudable goal in itself. Nevertheless, departing from the classic paradigm of explanatory RCTs, especially as early as prior to market authorization, raises the question of ethical acceptability. In order to sustain public support for clinical research, this thesis therefore examines the ethical issues related to pragmatic trials. Specifically, the question is addressed whether modifications to the regulatory informed consent process would be ethically defensible. This thesis concludes with three ways to promote pragmatism in randomized trials in an ethically responsible manner. Firstly, a few relatively accessible methods are discussed to increase the practical relevance of randomized phase III trials and early post-marketing research. Secondly, adjusting the timing of the trial could provide a solution for obtaining timely real world answers in cases where a conflict arises between a pragmatic design feature and an ethical requirement. In cases for which these methods are insufficient, some pragmatic trials could potentially be conducted in the early post-market phase with less stringent requirements. Such trials would have to address questions of evident social value, under the condition that the risks are minimal, the research is infeasible otherwise and there is a sufficient degree of transparency and freedom of choice for patients.
- Published
- 2017
9. Assessment of HER2 status in breast cancer biopsies is not affected by accelerated tissue processing
- Author
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Bulte, J.P., Halilovic, A., Kalkman, S., Cleef, P. van, Diest, P.J. van, Strobbe, L., Wilt, J.H.W. de, Bult, P., Bulte, J.P., Halilovic, A., Kalkman, S., Cleef, P. van, Diest, P.J. van, Strobbe, L., Wilt, J.H.W. de, and Bult, P.
- Abstract
Contains fulltext : 192630.pdf (Publisher’s version ) (Open Access)
- Published
- 2018
10. Survival after Perioperative Cardiopulmonary Resuscitation : Providing an Evidence Base for Ethical Management of Do-not-resuscitate Orders
- Author
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Kalkman, S, Hooft, Lotty, Meijerman, Johanne M, Knape, Johannes T A, and van Delden, Johannes J M
- Subjects
Research Support, Non-U.S. Gov't ,Journal Article ,Review ,humanities ,health care economics and organizations ,Meta-Analysis - Abstract
Automatic suspension of do-not-resuscitate (DNR) orders during general anesthesia does not sufficiently address a patient's right to self-determination and is a practice still observed among anesthesiologists today. To provide an evidence base for ethical management of DNR orders during anesthesia and surgery, the authors performed a systematic review of the literature to quantify the survival after perioperative cardiopulmonary resuscitation (CPR). Results show that the probability of surviving perioperative CPR ranged from 32.0 to 55.7% when measured within the first 24 h after arrest with a neurologically favorable outcome expectancy between 45.3 and 66.8% at follow-up, which suggests a viable survival of approximately 25%. Because CPR generally proves successful in less than 15% of out-of-hospital cardiac arrests, the altered outcome probabilities that the conditions in the operating room bring on warrant reevaluation of DNR orders during the perioperative period. By preoperatively communicating the evidence to patients, they can make better informed decisions while reducing the level of moral distress that anesthesiologists may experience when certain patients decide to retain their DNR orders.
- Published
- 2016
11. Pragmatic randomized trials with new interventions : An ethical analysis
- Author
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van Delden, Hans, Grobbee, DE, van Thiel, GJMW, Kalkman, S, van Delden, Hans, Grobbee, DE, van Thiel, GJMW, and Kalkman, S
- Published
- 2017
12. ‘Transforming thoughts to feel better? The mediating effect of cognitive restructuring on depression symptoms in adolescents.’
- Author
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Kalkman, S., Bodden, D. (Thesis Advisor), Heuvel, M. van den, Kalkman, S., Bodden, D. (Thesis Advisor), and Heuvel, M. van den
- Abstract
As maladaptive cognitions are an important aspect of depression, they are major targets in both prevention and treatment of depression in adolescents. Although cognitive restructuring (CR) is one of the most applied techniques in effective cognitive behavioural treatment (CBT) programs for depression, it is still unclear if the explicit modification of maladaptive cognitions is the mechanism that ensures positive results. Therefore, this explorative study examined if CR mediates treatment outcomes of an indicated CGT-based depression prevention program; the STARr-training. Adolescents aged 11 to 17 (M=13.82, SD=1.44, n=68, 51,5% girls) were randomly assigned to either the CR condition (n=18) or one of three non-CR conditions (n=50). The complete program consists of four modules, each containing three group-sessions. The present study focusses on outcomes of solely the first module. Depression symptoms were assessed using the CDI-2 and cognitive errors using the CNCEQ-R, at pre- and intermediate measurements. Results showed no decrease in either depression symptoms or cognitive errors in the total group, CR group and non-CR group after completing the first three group-sessions of the program. Whereas overall, depression symptoms and cognitive errors were positively related, depression symptoms before and after the intervention did not significantly relate with change in cognitive errors. Therefore, a regression analysis was not performed. It was concluded that after three group-sessions, the intervention did not affect the level of depression symptoms and cognitive errors in participants, regardless of their treatment condition. Moreover, the hypothesis that CR evokes change in cognitive errors and thereby mediates treatment outcomes, is rejected. Possible explanations and implications for future research and clinical practice are discussed.
- Published
- 2017
13. Pragmatic randomized trials with new interventions: An ethical analysis
- Author
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Medical Humanities Onderzoek Team 1, Circulatory Health, van Delden, Hans, Grobbee, Rick, van Thiel, GJMW, Kalkman, S, Medical Humanities Onderzoek Team 1, Circulatory Health, van Delden, Hans, Grobbee, Rick, van Thiel, GJMW, and Kalkman, S
- Published
- 2017
14. Stakeholders' views on the ethical challenges of pragmatic trials investigating pharmaceutical drugs
- Author
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Kalkman, S, van Thiel, Ghislaine J M W, Grobbee, Diederick E., Meinecke, Anna Katharina, Zuidgeest, Mira G P, van Delden, Johannes J M, Kalkman, S, van Thiel, Ghislaine J M W, Grobbee, Diederick E., Meinecke, Anna Katharina, Zuidgeest, Mira G P, and van Delden, Johannes J M
- Published
- 2016
15. It Takes Two Teams to Save Integrity
- Author
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Kalkman, S, van Delden, J. (Hans) J.M., Kalkman, S, and van Delden, J. (Hans) J.M.
- Published
- 2016
16. Awareness matters: Moderating effects of self-perception of popularity on the association between perceived popularity and relational aggression.
- Author
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Scholte Lubberink, K.C.M., Garandeau, C. (Thesis Advisor), Mercer, N., Put, E.G.P. van der, Kalkman, S., Wijngaarden, C.A. van, Scholte Lubberink, K.C.M., Garandeau, C. (Thesis Advisor), Mercer, N., Put, E.G.P. van der, Kalkman, S., and Wijngaarden, C.A. van
- Abstract
There is a growing body of research emphasizing the positive association between perceived popularity and relational aggression. The present study examines the moderating effect of self-perceived popularity on this association, using an adolescent sample (N = 642) in middle schools across the Netherlands. Data was collected using questionnaires including self-reports and peer-nominations. Self-perception of popularity was found to moderate the association between perceived popularity and relational aggression. The highest levels of relational aggression were observed in highly popular adolescents aware of their peer status, the lowest levels of relational aggression were found in adolescents unaware of their low peer status, emphasizing that awareness matters.
- Published
- 2016
17. It Takes Two Teams to Save Integrity
- Author
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Medical Humanities Onderzoek Team 1, Circulatory Health, Bioethics & Health Humanities, Regenerative Medicine and Stem Cells, JC onderzoeksprogramma Methodologie, Global Public Health & Bioethics, Kalkman, S, van Delden, J. (Hans) J.M., Medical Humanities Onderzoek Team 1, Circulatory Health, Bioethics & Health Humanities, Regenerative Medicine and Stem Cells, JC onderzoeksprogramma Methodologie, Global Public Health & Bioethics, Kalkman, S, and van Delden, J. (Hans) J.M.
- Published
- 2016
18. Stakeholders' views on the ethical challenges of pragmatic trials investigating pharmaceutical drugs
- Author
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Medical Humanities Onderzoek Team 1, Global Public Health & Bioethics, UMC Utrecht, Circulatory Health, JC onderzoeksprogramma Methodologie, Epidemiology & Health Economics, Cardiovasculaire Epi Team 9, JC onderzoeksprogramma Cardiovasculaire Epidemiologie, Epi Methoden Team 1, Global Health, Bioethics & Health Humanities, Regenerative Medicine and Stem Cells, Kalkman, S, van Thiel, Ghislaine J M W, Grobbee, Diederick E., Meinecke, Anna Katharina, Zuidgeest, Mira G P, van Delden, Johannes J M, Medical Humanities Onderzoek Team 1, Global Public Health & Bioethics, UMC Utrecht, Circulatory Health, JC onderzoeksprogramma Methodologie, Epidemiology & Health Economics, Cardiovasculaire Epi Team 9, JC onderzoeksprogramma Cardiovasculaire Epidemiologie, Epi Methoden Team 1, Global Health, Bioethics & Health Humanities, Regenerative Medicine and Stem Cells, Kalkman, S, van Thiel, Ghislaine J M W, Grobbee, Diederick E., Meinecke, Anna Katharina, Zuidgeest, Mira G P, and van Delden, Johannes J M
- Published
- 2016
19. Survival after Perioperative Cardiopulmonary Resuscitation: Providing an Evidence Base for Ethical Management of Do-not-resuscitate Orders
- Author
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Medical Humanities Onderzoek Team 1, Circulatory Health, Medische staf Anesthesiologie, Other research (not in main researchprogram), Bioethics & Health Humanities, JC onderzoeksprogramma Methodologie, Regenerative Medicine and Stem Cells, Epi Methoden Team 5, Kalkman, S, Hooft, Lotty, Meijerman, Johanne M, Knape, Johannes T A, van Delden, Johannes J M, Medical Humanities Onderzoek Team 1, Circulatory Health, Medische staf Anesthesiologie, Other research (not in main researchprogram), Bioethics & Health Humanities, JC onderzoeksprogramma Methodologie, Regenerative Medicine and Stem Cells, Epi Methoden Team 5, Kalkman, S, Hooft, Lotty, Meijerman, Johanne M, Knape, Johannes T A, and van Delden, Johannes J M
- Published
- 2016
20. Brief fixation does not hamper the reliability of Ki67 analysis in breast cancer core-needle biopsies: a double-centre study
- Author
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Kalkman, S., Bulte, J.P., Halilovic, A., Bult, P., Diest, P.J. van, Kalkman, S., Bulte, J.P., Halilovic, A., Bult, P., and Diest, P.J. van
- Abstract
Contains fulltext : 154684pub.pdf (publisher's version ) (Closed access) Contains fulltext : 154684pos.pdf (postprint version ) (Open Access), AIMS: Immunohistochemical assessment of Ki67 expression in core-needle biopsies (CNBs) is increasingly playing a role in therapeutic decision-making for breast cancer patients. Within the framework of same-day diagnosis of breast lesions, fixation times are markedly decreased. We therefore attempted to validate Ki67 analysis in briefly fixed breast cancer CNBs. METHODS AND RESULTS: CNBs of 136 consecutive patients with invasive breast cancer diagnosed through the same-day diagnosis programme of both the University Medical Centre Utrecht (UMCU) and the Radboud University Medical Centre (RUMC) were included. CNBs were fixed in formaldehyde for approximately 45 min at the UMCU and for between 60 and 90 min at the RUMC. Immunohistochemistry for Ki67 expression was compared between the briefly fixed CNBs and conventionally fixed resection specimens of the same tumour. The overall agreement between CNBs and resections was 122 of 142 (85.9%) (kappa = 0.71; 95% CI 0.60-0.83). Positive and negative predictive values were 79.7% (95% CI 67-88%) and 91.0% (95% CI 82-96%), respectively. CONCLUSIONS: Overall agreement for Ki67 expression was good between briefly fixed CNBs and conventionally fixed resection specimens, and within the range of studies comparing conventionally fixed CNBs and resections.
- Published
- 2015
21. Power and Representation: An Intersectional Feminist Analysis of J.M. Coetzee’s Disgrace
- Author
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Kalkman, S., Franssen, Dr. P.J.C.M. (Thesis Advisor), Kalkman, S., and Franssen, Dr. P.J.C.M. (Thesis Advisor)
- Abstract
J.M. Coetzee’s Disgrace is a complex, ambiguous novel that has been hailed for its portrayal of the erosion of white, male privilege in post-apartheid South Africa, and criticised as perpetuating racist stereotypes. Looking at Disgrace from an intersectional feminist perspective, which takes into account multiple areas of oppression, reveals that there is truth in both the praise and criticism. Although the novel clearly shows that its protagonist no longer has the power and privilege he used to have, its use of racist and sexist tropes, such as the rape of a white woman by a group of black men, makes it impossible to truly call Disgrace a feminist novel.
- Published
- 2015
22. De graphic novel: waardevolle toevoeging aan de literatuurles?
- Author
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IJperen, A.J. van, Mantingh, E. (Thesis Advisor), Waveren Hogervorst, C. van, Janssen, M.H., Kalkman, S., Corput, E. van de, IJperen, A.J. van, Mantingh, E. (Thesis Advisor), Waveren Hogervorst, C. van, Janssen, M.H., Kalkman, S., and Corput, E. van de
- Abstract
Welke invulling moet er gegeven worden aan het literatuuronderwijs? Veel docenten gebruiken inmiddels films en muziek in het curriculum, maar is er ook ruimte voor een nieuw medium? In vergelijking met conventionele stripverhalen, wordt de graphic novel (beeldroman) gekenmerkt door een meer literaire inslag en een volwassener lezerspubliek. Het genre bestaat uit originele werken en adaptaties van klassiekers. In dit verkennend onderzoek worden docenten van verschillende scholen gevraagd naar hun opvattingen, eigen praktijk en de toepassingsmogelijkheden. Welke voor- en nadelen zien deze ervaringsdeskundigen in het gebruik van de graphic novel en hoe verhouden zich deze tot hun opvattingen over literatuuronderwijs in het algemeen?
- Published
- 2014
23. DE ONTWIKKELINGEN VAN DE ACCOUTNANTSCONTROLEWERKZAAMHEDEN BIJ NIET OP WINST GERICHTE INTSTELLINGEN
- Author
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Kalkman, S., primary
- Published
- 1980
- Full Text
- View/download PDF
24. Correction: A framework for evaluating long-term impact of newborn screening.
- Author
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Kalkman S, Wevers RA, Wijburg FA, and Leeflang MMG
- Published
- 2024
- Full Text
- View/download PDF
25. A framework for evaluating long-term impact of newborn screening.
- Author
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Kalkman S, Wevers RA, Wijburg FA, and Leeflang MMG
- Subjects
- Infant, Newborn, Humans, Neonatal Screening, Quality Assurance, Health Care
- Published
- 2024
- Full Text
- View/download PDF
26. The case for screening in early life for 'non-treatable' disorders: ethics, evidence and proportionality. A report from the Health Council of the Netherlands.
- Author
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Kalkman S and Dondorp W
- Subjects
- Child, Family, Humans, Infant, Newborn, Netherlands, Parents, Muscular Dystrophy, Duchenne diagnosis, Muscular Dystrophy, Duchenne genetics, Neonatal Screening methods
- Abstract
In the Netherlands, the call to add 'non-treatable' disorders to the newborn bloodspot screening programme has found a sympathetic ear with the Government. In 2019, the Health Council of the Netherlands was formally asked for advice on the conditions under which bloodspot screening for such disorders might be offered. Here we present the reasoning and the recommendations of the resulting report, and briefly discuss its reception. The report holds on to the classical view that screening must benefit the child, but argues for a wider account of child benefit than only in terms of substantial health gains. However, screening for 'non-treatable' disorders would still require evidence of a favourable benefits to harm ratio. The report presents a framework for such screening, but concludes that apart perhaps from Duchenne Muscular Dystrophy (DMD), no or only very few 'non-treatable' disorders would at present meet its criteria. Setting up a screening programme that might benefit only a small percentage of families struggling with uncertainty about their child's diagnosis would not seem proportional. Instead, the Government is advised to invest in a better infrastructure for early referral, testing and care. The reaction to the report from proponents of such screening shows that the dividing line in the debate is not about whether screening neonates for 'non-treatable' disorders is acceptable in itself. It is rather whether such screening should be regarded as catering to a parental 'right to know', or as a public health service that should be subject to standards of evidence and proportionality., (© 2022. The Author(s), under exclusive licence to European Society of Human Genetics.)
- Published
- 2022
- Full Text
- View/download PDF
27. Patients' and public views and attitudes towards the sharing of health data for research: a narrative review of the empirical evidence.
- Author
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Kalkman S, van Delden J, Banerjee A, Tyl B, Mostert M, and van Thiel G
- Subjects
- Attitude, Humans, Information Dissemination, Trust, Confidentiality, Privacy
- Abstract
Introduction: International sharing of health data opens the door to the study of the so-called 'Big Data', which holds great promise for improving patient-centred care. Failure of recent data sharing initiatives indicates an urgent need to invest in societal trust in researchers and institutions. Key to an informed understanding of such a 'social license' is identifying the views patients and the public may hold with regard to data sharing for health research., Methods: We performed a narrative review of the empirical evidence addressing patients' and public views and attitudes towards the use of health data for research purposes. The literature databases PubMed (MEDLINE), Embase, Scopus and Google Scholar were searched in April 2019 to identify relevant publications. Patients' and public attitudes were extracted from selected references and thematically categorised., Results: Twenty-seven papers were included for review, including both qualitative and quantitative studies and systematic reviews. Results suggest widespread-though conditional-support among patients and the public for data sharing for health research. Despite the fact that participants recognise actual or potential benefits of data research, they expressed concerns about breaches of confidentiality and potential abuses of the data. Studies showed agreement on the following conditions: value, privacy, risk minimisation, data security, transparency, control, information, trust, responsibility and accountability., Conclusions: Our results indicate that a social license for data-intensive health research cannot simply be presumed. To strengthen the social license, identified conditions ought to be operationalised in a governance framework that incorporates the diverse patient and public values, needs and interests., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2022
- Full Text
- View/download PDF
28. [The value of booster vaccination against COVID-19].
- Author
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van Lier PAC and Kalkman S
- Subjects
- COVID-19 Vaccines, Humans, SARS-CoV-2, Vaccination, COVID-19, Vaccines
- Abstract
The first vaccines against Covid-19 were approved in December 2020 and administered in the Netherlands from the beginning of January 2021. As of November 2021, The Dutch government has started its booster programme to administer an additional vaccine dose to the population.This paper discusses the current knowledge about the duration of protection of the Covid-19 vaccines that are used in the Netherlands, and the added value of booster vaccination.
- Published
- 2021
29. The social licence for data-intensive health research: towards co-creation, public value and trust.
- Author
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Muller SHA, Kalkman S, van Thiel GJMW, Mostert M, and van Delden JJM
- Subjects
- Big Data, Humans, Social Justice, Biomedical Research, Trust
- Abstract
Background: The rise of Big Data-driven health research challenges the assumed contribution of medical research to the public good, raising questions about whether the status of such research as a common good should be taken for granted, and how public trust can be preserved. Scandals arising out of sharing data during medical research have pointed out that going beyond the requirements of law may be necessary for sustaining trust in data-intensive health research. We propose building upon the use of a social licence for achieving such ethical governance., Main Text: We performed a narrative review of the social licence as presented in the biomedical literature. We used a systematic search and selection process, followed by a critical conceptual analysis. The systematic search resulted in nine publications. Our conceptual analysis aims to clarify how societal permission can be granted to health research projects which rely upon the reuse and/or linkage of health data. These activities may be morally demanding. For these types of activities, a moral legitimation, beyond the limits of law, may need to be sought in order to preserve trust. Our analysis indicates that a social licence encourages us to recognise a broad range of stakeholder interests and perspectives in data-intensive health research. This is especially true for patients contributing data. Incorporating such a practice paves the way towards an ethical governance, based upon trust. Public engagement that involves patients from the start is called for to strengthen this social licence., Conclusions: There are several merits to using the concept of social licence as a guideline for ethical governance. Firstly, it fits the novel scale of data-related risks; secondly, it focuses attention on trustworthiness; and finally, it offers co-creation as a way forward. Greater trust can be achieved in the governance of data-intensive health research by highlighting strategic dialogue with both patients contributing the data, and the public in general. This should ultimately contribute to a more ethical practice of governance., (© 2021. The Author(s).)
- Published
- 2021
- Full Text
- View/download PDF
30. In-Hospital Production of Medicines: Preparing for Disruption.
- Author
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Kalkman S, Arentshorst M, Hoekman J, Boon W, Uijtendaal E, van Thiel G, and Moors E
- Subjects
- Humans, Pharmacies, Drug Compounding, Hospitals, Pharmaceutical Preparations
- Abstract
In-hospital production of affordable medicines holds potential to address problems of drug accessibility. However, expanding the scope of magistral preparation to include high-cost drugs and complex biologicals gives rise to new challenges. We discuss ethical and regulatory complexities faced by Dutch initiatives defying the current pharmaceutical system through magistral preparation., (Copyright © 2019 Elsevier Ltd. All rights reserved.)
- Published
- 2020
- Full Text
- View/download PDF
31. Community-Based Healthcare for Migrants and Refugees: A Scoping Literature Review of Best Practices.
- Author
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Riza E, Kalkman S, Coritsidis A, Koubardas S, Vassiliu S, Lazarou D, Karnaki P, Zota D, Kantzanou M, Psaltopoulou T, and Linos A
- Abstract
Background: Strengthening community-based healthcare is a valuable strategy to reduce health inequalities and improve the integration of migrants and refugees into local communities in the European Union. However, little is known about how to effectively develop and run community-based healthcare models for migrants and refugees. Aiming at identifying the most-promising best practices, we performed a scoping review of the international academic literature into effective community-based healthcare models and interventions for migrants and refugees as part of the Mig-HealthCare project., Methods: A systematic search in PubMed, EMBASE, and Scopus databases was conducted in March 2018 following the PRISMA methodology. Data extraction from eligible publications included information on general study characteristics, a brief description of the intervention/model, and reported outcomes in terms of effectiveness and challenges. Subsequently, we critically assessed the available evidence per type of healthcare service according to specific criteria to establish a shortlist of the most promising best practices., Results: In total, 118 academic publications were critically reviewed and categorized in the thematic areas of mental health ( n = 53), general health services ( n = 36), noncommunicable diseases ( n = 13), primary healthcare ( n = 9), and women's maternal and child health ( n = 7)., Conclusion: A set of 15 of the most-promising best practices and tools in community-based healthcare for migrants and refugees were identified that include several intervention approaches per thematic category. The elements of good communication, the linguistic barriers and the cultural differences, played crucial roles in the effective application of the interventions. The close collaboration of the various stakeholders, the local communities, the migrant/refugee communities, and the partnerships is a key element in the successful implementation of primary healthcare provision.
- Published
- 2020
- Full Text
- View/download PDF
32. Responsible data sharing in international health research: a systematic review of principles and norms.
- Author
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Kalkman S, Mostert M, Gerlinger C, van Delden JJM, and van Thiel GJMW
- Subjects
- Bioethical Issues, Confidentiality, Humans, Moral Obligations, Biomedical Research ethics, Data Collection ethics, Guideline Adherence ethics, Information Dissemination ethics, Informed Consent ethics
- Abstract
Background: Large-scale linkage of international clinical datasets could lead to unique insights into disease aetiology and facilitate treatment evaluation and drug development. Hereto, multi-stakeholder consortia are currently designing several disease-specific translational research platforms to enable international health data sharing. Despite the recent adoption of the EU General Data Protection Regulation (GDPR), the procedures for how to govern responsible data sharing in such projects are not at all spelled out yet. In search of a first, basic outline of an ethical governance framework, we set out to explore relevant ethical principles and norms., Methods: We performed a systematic review of literature and ethical guidelines for principles and norms pertaining to data sharing for international health research., Results: We observed an abundance of principles and norms with considerable convergence at the aggregate level of four overarching themes: societal benefits and value; distribution of risks, benefits and burdens; respect for individuals and groups; and public trust and engagement. However, at the level of principles and norms we identified substantial variation in the phrasing and level of detail, the number and content of norms considered necessary to protect a principle, and the contextual approaches in which principles and norms are used., Conclusions: While providing some helpful leads for further work on a coherent governance framework for data sharing, the current collection of principles and norms prompts important questions about how to streamline terminology regarding de-identification and how to harmonise the identified principles and norms into a coherent governance framework that promotes data sharing while securing public trust.
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- 2019
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33. Pragmatic clinical trials: ethical imperatives and opportunities.
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Kalkman S, van Thiel GJMW, Grobbee DE, and van Delden JJM
- Subjects
- Decision Making ethics, Humans, Research Design standards, Clinical Trials as Topic ethics, Clinical Trials as Topic standards, Pharmaceutical Preparations standards
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- 2018
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34. Assessment of HER2 status in breast cancer biopsies is not affected by accelerated tissue processing.
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Bulte JP, Halilovic A, Kalkman S, van Cleef PHJ, van Diest PJ, Strobbe LJA, de Wilt JHW, and Bult P
- Subjects
- Adult, Aged, Aged, 80 and over, Biopsy, Biopsy, Large-Core Needle, Female, Humans, Middle Aged, Breast Neoplasms diagnosis, Receptor, ErbB-2 analysis, Tissue Fixation methods
- Abstract
Aims: To establish whether core needle biopsy (CNB) specimens processed with an accelerated processing method with short fixation time can be used to determine accurately the human epidermal growth factor receptor 2 (HER2) status of breast cancer., Methods and Results: A consecutive case-series from two high-volume breast clinics was created. We compared routine HER2 immunohistochemistry (IHC) assessment between accelerated processing CNB specimens and routinely processed postoperative excision specimens. Additional amplification-based testing was performed in cases with equivocal results. The formalin fixation time was less than 2 h and between 6 and 72 h, respectively. Fluorescence in-situ hybridisation and multiplex ligation-dependent probe amplification were used for amplification testing. One hundred and forty-four cases were included, 15 of which were HER2-positive on the routinely processed excision specimens. On the CNB specimens, 44 were equivocal on IHC and required an amplification-based test. Correlation between the CNB specimens and the corresponding excision specimens was high for final HER2 status, with an accuracy of 97% and a kappa of 0.85., Conclusions: HER2 status can be determined reliably on CNB specimens with accelerated processing time using standard clinical testing methods. Using this accelerated technology the minimum 6 h of formalin fixation, which current guidelines consider necessary, can be decreased safely. This allows for a complete and expedited histology-based diagnosis of breast lesions in the setting of a one-stop-shop, same-day breast clinic., (© 2018 The Authors. Histopathology Published by John Wiley & Sons Ltd.)
- Published
- 2018
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35. Series: Pragmatic trials and real world evidence: Paper 4. Informed consent.
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Kalkman S, van Thiel GJMW, Zuidgeest MGP, Goetz I, Pfeiffer BM, Grobbee DE, and van Delden JJM
- Subjects
- Humans, Informed Consent standards, Pragmatic Clinical Trials as Topic standards
- Abstract
The GetReal consortium of the Innovative Medicines Initiative aims to develop strategies to incorporate real-world evidence earlier into the drug life cycle to better inform health care decision makers on the comparative risks and benefits of new drugs. Pragmatic trials are currently explored as a means to generate such evidence in routine care settings. The traditional informed consent model for randomized clinical trials has been argued to pose substantial hurdles to the practicability of pragmatic trials: it would lead to recruitment difficulties, reduced generalizability of the results, and selection bias. The present article analyzes these challenges and discusses four proposed alternative informed consent models: integrated consent, targeted consent, broadcast consent, and a waiver of consent. These alternative consent models each aim at overcoming operational and methodological challenges, while still providing patients all the relevant information they need to make informed decisions. Each consent model, however, relies on different attitudes toward the principle of respect for persons and the related duty to inform patients as well as represents different views on whether the common good demands moral duties from patients. Such normative consequences of modifying consent requirements should be at least acknowledged and ought to be assessed in light of the validity of empirical claims., (Copyright © 2017 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2017
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36. Series: Pragmatic trials and real world evidence: Paper 3. Patient selection challenges and consequences.
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Oude Rengerink K, Kalkman S, Collier S, Ciaglia A, Worsley SD, Lightbourne A, Eckert L, Groenwold RHH, Grobbee DE, and Irving EA
- Subjects
- Humans, Pragmatic Clinical Trials as Topic standards, Patient Selection, Pragmatic Clinical Trials as Topic methods
- Abstract
This paper addresses challenges of identifying, enrolling, and retaining participants in a trial conducted within a routine care setting. All patients who are potential candidates for the treatments in routine clinical practice should be considered eligible for a pragmatic trial. To ensure generalizability, the recruited sample should have a similar distribution of the treatment effect modifiers as the target population. In practice, this can be best achieved by including-within the selected sites-all patients without further selection. If relevant heterogeneity between subgroups is expected, increasing the relative proportion of the subgroup of patients in the heterogeneous trial could be considered (oversampling) or a separate trial in this subgroup can be planned. Selection will nevertheless occur. Low enrollment and loss to follow-up can introduce selection and can jeopardize validity as well as generalizability. Pragmatic trials are conducted in clinical practice rather than in a dedicated research setting, which could reduce recruitment rates. However, if a trial poses a minimal burden to the physician and the patient and routine clinical practice is maximally adhered to, the participation rate may be high and loss to follow-up will not be a specific problem for pragmatic trials., (Copyright © 2017 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2017
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37. Ethics of Informed Consent for Pragmatic Trials with New Interventions.
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Kalkman S, Kim SYH, van Thiel GJMW, Grobbee DE, and van Delden JJM
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- Drug Approval, Drug Design, Humans, Randomized Controlled Trials as Topic ethics, Comparative Effectiveness Research ethics, Informed Consent ethics, Randomized Controlled Trials as Topic methods
- Abstract
Objectives: Pragmatic trials evaluate the comparative benefits, risks, and burdens of health care interventions in real-world conditions. Such studies are now recognized as valuable to the perimarketing stage of drug development and evaluation, with early pragmatic trials (EPTs) being explored as a means to generate real-world evidence at the time of regulatory market approval. In this article, we present an analysis of the ethical issues involved in informed consent for EPTs, in light of the generally recognized concern that traditional ethical rules governing randomized clinical trials, such as lengthy informed consent procedures, could threaten the "real world" nature of such trials. Specifically, we examine to what extent modifications (waivers or alterations) to regulatory consent for EPTs would be ethical., Methods: We first identify broadly accepted necessary conditions for modifications of informed consent (namely, the research involves no more than minimal risk of harm, the research is impracticable with regulatory consent, and the alternative to regulatory consent does not violate legitimate patient expectations) and then apply those criteria to the premarket and early postmarket contexts., Results and Conclusions: The analysis shows that neither waivers nor alterations of regulatory consent for premarket EPTs will be ethically permissible. For postmarket EPTs with newly approved interventions, waivers of consent will be ethically problematic, but some studies might be conducted in an ethical manner with alterations to regulatory consent., (Copyright © 2017 International Society for Pharmacoeconomics and Outcomes Research (ISPOR). Published by Elsevier Inc. All rights reserved.)
- Published
- 2017
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38. The Social Value of Pragmatic Trials.
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Kalkman S, van Thiel G, van der Graaf R, Zuidgeest M, Goetz I, Grobbee D, and van Delden J
- Subjects
- Humans, Informed Consent, Research Design, Ethics, Research, Social Values
- Abstract
Pragmatic trials aim to directly inform health care decision-making through the collection of so-called 'real world data' from observations of comparative treatment effects in clinical practice. In order to ensure the applicability and feasibility of a pragmatic trial, design features may be necessary that deviate from standard research ethics requirements. Examples are traditional requirements to seek written informed consent and to perform extensive data and safety monitoring. Proposals for deviations from standard research ethics practice have resulted in controversy about their ethical acceptability. One of the justifications for altered procedures is the allegedly high social value of pragmatic trials. In order to properly operationalize the concept in the ethical assessment of pragmatic trial designs, specification is warranted. We identified three determinants from common claims about a pragmatic trial's social value: (1) the extent to which the research question has real world relevance, (2) the trial design's ability to generate a real world answer and (3) the probability of direct uptake of the results by decision-makers in practice. Subsequently, we discuss how these determinants should be applied to the practice of pragmatic trials, and to what extent they might be applicable to explanatory trials., (© 2017 John Wiley & Sons Ltd.)
- Published
- 2017
- Full Text
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39. It Takes Two Teams to Save Integrity.
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Kalkman S and van Delden JJ
- Subjects
- Humans, Euthanasia, Active, Voluntary ethics, Tissue and Organ Procurement ethics
- Published
- 2016
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40. Stakeholders' views on the ethical challenges of pragmatic trials investigating pharmaceutical drugs.
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Kalkman S, van Thiel GJ, Grobbee DE, Meinecke AK, Zuidgeest MG, and van Delden JJ
- Subjects
- Comparative Effectiveness Research ethics, Consent Forms ethics, Drugs, Investigational adverse effects, Female, Humans, Informed Consent ethics, Interviews as Topic, Male, Patient Safety, Physician's Role, Pragmatic Clinical Trials as Topic methods, Qualitative Research, Risk Factors, Therapeutic Equipoise, Treatment Outcome, Attitude of Health Personnel, Drugs, Investigational therapeutic use, Health Knowledge, Attitudes, Practice, Pragmatic Clinical Trials as Topic ethics, Research Design, Research Personnel psychology, Stakeholder Participation
- Abstract
Background: We explored the views of key stakeholders to identify the ethical challenges of pragmatic trials investigating pharmaceutical drugs. A secondary aim was to capture stakeholders' attitudes towards the implementation of pragmatic trials in the drug development process., Methods: We conducted semistructured, in-depth interviews among individuals from different key stakeholder groups (academia and independent research institutions, the pharmaceutical industry, regulators, Health Technology Assessment (HTA) agencies and patients' organizations) through telephone or face-to-face sessions. Interviews were structured around the question "what challenges were experienced or perceived during the design, conduct and/or review of pragmatic trials." Respondents were additionally asked about their views on implementation of pragmatic trials in the drug development process. Thematic analysis was used to identify the ethically relevant features across data sets., Results: We interviewed 34 stakeholders in 25 individual sessions and four group sessions. The four perceived challenges of ethical relevance were: (1) less controlled conditions creating safety concerns, (2) comparison with usual care potentially compromising clinical equipoise, (3) tailored or waivers of informed consent affecting patient autonomy, and (4) minimal interference with "real-world" practice reducing the knowledge value of trial results., Conclusions: We identified stakeholder concerns regarding risk assessment, use of suboptimal usual care as a comparator, tailoring of informed consent procedures and ensuring the social value of pragmatic trials. These concerns increased when respondents were asked about pragmatic trials conducted before market authorization.
- Published
- 2016
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41. Survival after Perioperative Cardiopulmonary Resuscitation: Providing an Evidence Base for Ethical Management of Do-not-resuscitate Orders.
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Kalkman S, Hooft L, Meijerman JM, Knape JT, and van Delden JJ
- Subjects
- Cardiopulmonary Resuscitation mortality, Cardiopulmonary Resuscitation trends, Evidence-Based Medicine trends, Humans, Survival Rate trends, Cardiopulmonary Resuscitation ethics, Disease Management, Evidence-Based Medicine ethics, Resuscitation Orders ethics
- Abstract
Automatic suspension of do-not-resuscitate (DNR) orders during general anesthesia does not sufficiently address a patient's right to self-determination and is a practice still observed among anesthesiologists today. To provide an evidence base for ethical management of DNR orders during anesthesia and surgery, the authors performed a systematic review of the literature to quantify the survival after perioperative cardiopulmonary resuscitation (CPR). Results show that the probability of surviving perioperative CPR ranged from 32.0 to 55.7% when measured within the first 24 h after arrest with a neurologically favorable outcome expectancy between 45.3 and 66.8% at follow-up, which suggests a viable survival of approximately 25%. Because CPR generally proves successful in less than 15% of out-of-hospital cardiac arrests, the altered outcome probabilities that the conditions in the operating room bring on warrant reevaluation of DNR orders during the perioperative period. By preoperatively communicating the evidence to patients, they can make better informed decisions while reducing the level of moral distress that anesthesiologists may experience when certain patients decide to retain their DNR orders.
- Published
- 2016
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42. Pragmatic randomized trials in drug development pose new ethical questions: a systematic review.
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Kalkman S, van Thiel GJ, Grobbee DE, and van Delden JJ
- Subjects
- Humans, Informed Consent ethics, Patient Safety, Risk Assessment, Risk Factors, Drug Discovery ethics, Pragmatic Clinical Trials as Topic ethics, Research Design, Research Subjects
- Abstract
Implementation of pragmatic design elements in drug development could bridge the evidence gap that currently exists between the knowledge we have regarding the efficacy of a drug versus its true, comparative effectiveness in real life. We performed a review of the literature to identify the ethical challenges thus far related to pragmatic trials. The three central ethical questions identified for pragmatic trials are: (i) what level of oversight should pragmatic trials require; (ii) do randomized patients face additional risks; and (iii) is a waiver of informed consent ethically defensible? Despite the fact all reviewed publications dealt with post-launch pragmatic trials, these results could serve as an important starting point for conceptualizing which challenges could potentially arise in the pre-launch setting., (Copyright © 2015 Elsevier Ltd. All rights reserved.)
- Published
- 2015
- Full Text
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43. Brief fixation and hormone receptor expression in breast cancer: authors' reply.
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Kalkman S and van Diest PJ
- Subjects
- Female, Humans, Breast Neoplasms diagnosis, Carcinoma diagnosis, Receptors, Estrogen analysis, Receptors, Progesterone analysis, Tissue Fixation methods
- Published
- 2015
- Full Text
- View/download PDF
44. Brief fixation does not hamper the reliability of Ki67 analysis in breast cancer core-needle biopsies: a double-centre study.
- Author
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Kalkman S, Bulte JP, Halilovic A, Bult P, and van Diest PJ
- Subjects
- Adult, Aged, Aged, 80 and over, Biopsy, Large-Core Needle, Female, Humans, Immunohistochemistry, Middle Aged, Biomarkers, Tumor analysis, Breast Neoplasms diagnosis, Carcinoma diagnosis, Ki-67 Antigen analysis, Tissue Fixation methods
- Abstract
Aims: Immunohistochemical assessment of Ki67 expression in core-needle biopsies (CNBs) is increasingly playing a role in therapeutic decision-making for breast cancer patients. Within the framework of same-day diagnosis of breast lesions, fixation times are markedly decreased. We therefore attempted to validate Ki67 analysis in briefly fixed breast cancer CNBs., Methods and Results: CNBs of 136 consecutive patients with invasive breast cancer diagnosed through the same-day diagnosis programme of both the University Medical Centre Utrecht (UMCU) and the Radboud University Medical Centre (RUMC) were included. CNBs were fixed in formaldehyde for approximately 45 min at the UMCU and for between 60 and 90 min at the RUMC. Immunohistochemistry for Ki67 expression was compared between the briefly fixed CNBs and conventionally fixed resection specimens of the same tumour. The overall agreement between CNBs and resections was 122 of 142 (85.9%) (κ = 0.71; 95% CI 0.60-0.83). Positive and negative predictive values were 79.7% (95% CI 67-88%) and 91.0% (95% CI 82-96%), respectively., Conclusions: Overall agreement for Ki67 expression was good between briefly fixed CNBs and conventionally fixed resection specimens, and within the range of studies comparing conventionally fixed CNBs and resections., (© 2014 John Wiley & Sons Ltd.)
- Published
- 2015
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45. Brief fixation does not affect assessment of hormone receptor expression in invasive breast carcinoma biopsies: paving the road for same-day tissue diagnostics.
- Author
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Kalkman S, Barentsz MW, Witkamp AJ, van der Wall E, Verkooijen HM, and van Diest PJ
- Subjects
- Adult, Aged, Aged, 80 and over, Biomarkers, Tumor analysis, Biopsy, Large-Core Needle, Breast Neoplasms metabolism, Female, Formaldehyde, Humans, Immunohistochemistry methods, Middle Aged, Paraffin Embedding, Breast Neoplasms diagnosis, Carcinoma diagnosis, Receptors, Estrogen analysis, Receptors, Progesterone analysis, Tissue Fixation methods
- Abstract
In patients with invasive breast carcinoma, estrogen receptor α (ERα) and progesterone receptor (PR) expressions need to be assessed in core-needle biopsies (CNBs) before the start of neoadjuvant systemic treatment. Current guidelines recommend a minimum formalin fixation time of 6 hours. Considering the increasing demand for same-day diagnostics in oncology, more rapid tissue processing with shorter fixation times is required. To identify whether brief fixation (<6 h) of CNBs compared with conventionally fixed resection specimens provides for reliable immunohistochemical assessment of ERα and PR expression, 78 consecutive patients diagnosed with invasive breast carcinoma were included through the same-day diagnostics programme of the UMC Utrecht. Paraffin-embedded CNBs fixed for approximately 45 minutes were retrieved. Immunohistochemistry for ERα and PR was compared between the briefly fixed CNBs and conventionally fixed resection specimens. All slides were reviewed by means of consensus scoring by 2 blinded observers. Overall agreement between CNB and resections was 73/74 (98.6%) for ERα (κ=0.85; 95% confidence interval [CI]=0.56-1.00) and 69/75 (92.0%) for PR (κ=0.81; 95% CI=0.66-0.96). For ERα, positive and negative predictive values were 98.6% (95% CI=0.91-0.99) and 100.0% (95% CI=0.31-1.00), respectively. For PR, positive and negative predictive values were 100.0% (95% CI=0.91-1.00) and 76.0% (95% CI=0.54-0.90). In conclusion, analysis of hormone receptor expression in briefly fixed CNB seems comparable to results from conventionally fixed resection specimens of the same tumor.
- Published
- 2014
- Full Text
- View/download PDF
46. The effects of under 6 hours of formalin fixation on hormone receptor and HER2 expression in invasive breast cancer: a systematic review.
- Author
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Kalkman S, Barentsz MW, and van Diest PJ
- Subjects
- Biomarkers, Tumor metabolism, Breast Neoplasms pathology, Female, Formaldehyde, Humans, Specimen Handling, Time Factors, Breast Neoplasms metabolism, Receptor, ErbB-2 metabolism, Receptors, Estrogen metabolism, Receptors, Progesterone metabolism, Tissue Fixation methods
- Abstract
Objectives: A systematic review of the literature was performed to identify whether minimum formalin fixation time may be reduced for reliable immunohistochemical assessment of estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2)., Methods: PubMed, EMBASE, and the Cochrane Library were systematically searched for studies addressing effects of brief tissue fixation (<6 hours) on the analysis of ER, PR, or HER2 expression in patients with breast cancer., Results: Five publications reported effects of brief fixation on ER, PR, or HER2 expression. Four studies showed similar receptor expression of short fixation compared with recommended fixation time (6-72 hours). One publication found that a minimum fixation time of 6 to 8 hours is necessary for reliable ER results., Conclusions: Available data on the effect of brief fixation on receptor status are limited. However, brief fixation of very highly expressing breast cancers does not seem to alter ER, PR, and HER2 status. Nevertheless, scoring inconsistencies have been observed. Further research is required in larger study populations with more low-expressing cases for future validation., (Copyright© by the American Society for Clinical Pathology.)
- Published
- 2014
- Full Text
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47. A dynamic pronation orthosis for the C6 tetraplegic arm.
- Author
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Hokken W, Kalkman S, Blanken WC, and van Asbeck FW
- Subjects
- Adult, Humans, Male, Muscle Spasticity etiology, Pronation, Braces, Forearm, Muscle Spasticity rehabilitation, Quadriplegia complications
- Abstract
Tetraplegic arms of patients with spinal cord injury at C5 or C6 level are often held in a flexed supinated position. In supination the function of the hand is limited. This report presents a newly developed orthosis giving active pronation of the forearm for a C6 complete tetraplegic. The orthosis consists of a pretightened coiled spring that gives a torque around the longitudinal axis of the forearm. The distal part of the spring is connected to a cuff around the wrist, and the proximal part to two fitting planes on the upper arm. With the orthosis, a 27-year-old patient with a C5-C6 spinal cord injury was able to participate in activities of daily living and to perform table top activities. This new orthosis provides pronation and markedly increases the patient's degree of independence.
- Published
- 1993
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