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Kerckhof P, Ambrosio G, Beeckmans H, Kaes J, Geudens V, Slambrouck J, Bos S, Vermant M, Aelbrecht C, Lynn W, Astrid V, Aversa L, Mohamady Y, Jin X, Charlotte D, Goos T, Iwein G, Vanstapel A, Orlitova M, Boone M, Janssens W, Josipovic I, Varghese V, Dupont L, Godinas L, Verleden G, Van Raemdonck D, Ceulemans L, Neyrinck A, McDonough J, Gayan-Ramirez G, Vanaudenaerde B, Vos R. Morphometric Airway Changes in Explanted Human Lungs with Chronic Lung Allograft Dysfunction. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.124] [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] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Soares M, Pereira D, Amaral A, Azevedo J, Bos S, Pereira A, Madeira N, Macedo A. Grief during the COVID-19 pandemic: A cross-sectional online survey in university students. Eur Psychiatry 2022. [PMCID: PMC9566684 DOI: 10.1192/j.eurpsy.2022.678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction
Almost 5 million people worldwide have lost their lives due to SARS-CoV-2 (source: WHO coronavirus (COVID-19) dashboard, data of 1.10.2021; https://covid19.who.int/) and therefore, globally, there is an increase of people in grief due to the death of a significant other.
Objectives
To study psychological correlates of grief during the COVID-19 pandemic.
Methods
591 university students, with a mean age of 23.84±7.95 years (range 18-65 years; 76.8% women; 91.2% Portuguese) completed an online questionnaire during the second COVID-19 confinement (from 15.02 to 13.03.2021), with sociodemographic questions, the Pandemic Stress Index, the Mental Health Inventory, Insomnia Scale, questions on physical/ psychological health, and social isolation.
Results
Students bereaving the death of a significant other (n=93, 15.7%; n=25, 26.9% reported cause was SARS-CoV-2; time since death: < 3 months to 1-year), compared to those who did not (n= 498; 84.3%), described poorer psychological health, higher psychological distress (depression, anxiety, lack of control) and sleep difficulties, higher levels of stress (higher impact of COVID pandemic in daily life, and higher behavior changes in response to COVID-19) and more social isolation.
Conclusions
COVID-19 pandemic-related stress is a source of additional stress for bereaved students. Grief is also associated with social isolation, poor mental health (depression, anxiety, lack of control) and sleep difficulties. Screening efforts, guidance, and counseling from professionals of mental health care, primary health care, and universities health care services during and after the COVID-19 pandemic could be extremely beneficial for bereaved students, particularly for those at higher risk of developing prolonged grief disorder.
Disclosure
No significant relationships.
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Godinas L, Bos S, Sacreas A, Beeckmans H, Daniëls L, Vanstapel A, Dierickx D, Dupont L, Neyrinck A, Ceulemans L, Van Raemdonck D, Vanaudenaerde B, Verleden G, Vos R. Characteristics of AMR Predicts Prognosis and Phenotype of CLAD. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.706] [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] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Beeckmans H, Van Roy E, Sacreas A, Vanstapel A, Kaes J, Geudens V, Vanaudenaerde B, Bos S, Van Slambrouck J, Orlitova M, Ceulemans L, Van Raemdonck D, Neyrinck A, Dupont L, Godinas L, Verleden G, Vos R. Specific IgG Antibodies to Aspergillus Fumigatus Are Associated with Fungal Isolation from Respiratory Samples and CLAD Occurence After Lung Transplantation. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.715] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Beeckmans H, Sacreas A, Vanstapel A, Kaes J, Geudens V, Bart V, Bos S, Van Slambrouck J, Orlitova M, Ceulemans L, Van Raemdonck D, Neyrinck A, Dupont L, Godinas L, Verleden G, Vos R. Chronic Lung Allograft Dysfunction: More Than Meets the Eye? J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.708] [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] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Beeckmans H, Sacreas A, Vanstapel A, Kaes J, Geudens V, Vanaudenaerrde B, Bos S, Van Slambrouck J, Orlitova M, Ceulemans L, Van Raemdonck D, Neyrinck A, Wuyts W, Dupont L, Godinas L, Verleden G, Vos R. Long-Term Pirfenidone for Restrictive Allograft Syndrome: A Case Series. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.265] [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] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Decaesteker T, Bos S, Lorent N, Everaerts S, Vanoirbeek J, Bullens D, Dupont LJ. Elevated serum calprotectin (S100A8/A9) in patients with severe asthma. J Asthma 2021; 59:1110-1115. [PMID: 33830849 DOI: 10.1080/02770903.2021.1914649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Asthma is a heterogeneous disease consisting of several inflammatory phenotypes of which neutrophilic asthma is associated with poorer responses to classic therapies, namely (inhaled) corticosteroids. The development of targeted therapies requires the identification of biomarkers to distinguish these phenotypes. Currently, we lack validated biomarkers for non-eosinophilic asthma. The aim of this study is to examine serum calprotectin (SC) in asthmatics and its potential as biomarker for neutrophilic asthma. METHODS Hundred-seventeen severe asthmatics were referred for sputum induction and data were obtained from their medical records. To evaluate the association between SC and asthma phenotypes, patients were divided into subgroups based on sputum cell count (3% eosinophils and 61% neutrophils). Additionally, SC levels of asthmatics were compared with these of patients with chronic obstructive pulmonary disease, non-cystic fibrosis bronchiectasis and healthy controls. RESULTS Asthmatics (n = 45) had significantly higher levels of SC than healthy controls. No significant differences were found between the different asthma phenotypes and in comparison with COPD patients. SC was significantly higher in asthmatics with a lower FEV1/FVC ratio (<70) and non-significantly elevated SC levels were seen in asthmatics with frequent exacerbations (>2 in the last year). CONCLUSION In conclusion, there was no difference in SC levels between the different inflammatory subtypes in asthmatics. Nevertheless, severe asthmatics seemed to have higher SC levels suggesting that SC may be a marker of disease severity rather than a marker for specific inflammatory subtypes in asthmatics. Further research in larger cohorts is necessary to validate SC as biomarker in severe asthmatics.
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Affiliation(s)
- T Decaesteker
- Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium
| | - S Bos
- Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
| | - N Lorent
- Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
| | - S Everaerts
- Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
| | - J Vanoirbeek
- Centre for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | - D Bullens
- Allergy and Clinical Immunology Research Group, Department of Immunology, Microbiology and Transplantation, KU Leuven, Leuven, Belgium.,Department of Paediatrics, University Hospitals Leuven, Leuven, Belgium
| | - L J Dupont
- Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), Department of Chronic Diseases, Metabolism and Ageing (CHROMETA), KU Leuven, Leuven, Belgium.,Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
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Rebelo P, Gooskens B, Pereira D, Cabaços C, Pereira A, Caldeira S, Madeira N, Bos S. Validation of the portuguese version of the mentalization questionnaire in a sample of college students: Preliminary results. Eur Psychiatry 2021. [PMCID: PMC9475713 DOI: 10.1192/j.eurpsy.2021.1184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Introduction Mentalization (MZ) is the capacity by which people make sense of their own’s and others’ mental states; when compromised, it is associated with several mental disorders (Bateman & Fonagy, 2010). A valid instrument to assess MZ is missing and required for the Portuguese population. Objectives To develop and validate a Portuguese version (Questionário de Mentalização – QMZ) of the Mentalization Questionnaire (MZQ) (Hausberg et al., 2012). Methods A sample of 184 Portuguese medical students (mean age = 21.6 ± 2.47 years, 59.8% female) was used to explore the psychometric properties of the scale, using reliability and factor analysis (varimax rotation method). Results The QMZ exhibited a Cronbach’s alpha score of .80. All items contributed to its reliability. Based on the scree plot of Cattell and interpretability of items, a 2-factor and a 5-factor structures were further explored. The former explained 38.8% of the total variance (VE) and included a regulation of affect (VE= 27.3%, α=.79) and a self-reflection and emotional awareness (VE= 11.5%, α=.62) factors. The latter explained 60.6% of the total variance and incorporated the following dimensions: self-control (VE= 27.3%, α=.74), daily relationships (VE= 11.5%, α=.67), self-comprehension (VE= 8.1%, α=.54), close relationships (VE= 7.0%, α=.41) and self-monitoring (VE= 6.7%, α=.52). The 5-factor structure was closer to the dimensional concept of mentalization. Conclusions The QMZ has proved to be a promising instrument, with adequate psychometric properties, confirmed by its acceptable construct, criterion and factorial validity and reliability to assess mentalization in Portuguese language.
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Bos S, Daniëls L, Michaux L, Bempt IV, Vermeer S, Woei-A-Jin S, Schöffski P, Weynand B, Sciot R, Declercq S, Van Raemdonck D, Ceulemans L, Dupont L, Verleden G, Vos R. An Unusual Course of Donor-Transmitted Angiosarcoma after Lung Transplantation. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.2044] [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] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Bos S, De Sadeleer LJ, Yserbyt J, Dupont LJ, Godinas L, Verleden GM, Ceulemans LJ, Vanaudenaerde BM, Vos R. Real life experience with mTOR-inhibitors after lung transplantation. Int Immunopharmacol 2021; 94:107501. [PMID: 33647822 DOI: 10.1016/j.intimp.2021.107501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/09/2021] [Accepted: 02/09/2021] [Indexed: 10/22/2022]
Abstract
Mammalian target of rapamycin inhibitors (mTORi) are increasingly used after lung transplantation as part of a calcineurin inhibitor sparing regimen, aiming to preserve renal function. The aim of our study was to determine whether immunosuppressive therapy using mTORi in lung transplant recipients (LTR) is feasible in practice, or limited by intolerance and adverse events. Data were retrospectively assessed for all LTR transplanted between July 1991 and January 2020. Patients ever receiving mTORi (monotherapy or in combination with calcineurin inhibitor) as treatment of physicians' choice were included. 149/1184 (13%) of the LTR ever received mTORi. Main reasons to start were renal insufficiency (67%) and malignancy (21%). In 52% of the patients, mTORi was stopped due to side effects or drug toxicity after a median time of 159 days. Apart from death, main reasons for discontinuation were infection (19%) and edema (14%). Early discontinuation (<90 days) was mainly due to edema or gastrointestinal intolerance. As mTORi was stopped due to adverse events or drug intolerance in 52% of LTR, cautious consideration of advantages and disadvantages when starting mTORi is recommended.
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Affiliation(s)
- S Bos
- Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium.
| | - L J De Sadeleer
- Department of Chronic Diseases and Metabolism (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium
| | - J Yserbyt
- Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium; Department of Chronic Diseases and Metabolism (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium
| | - L J Dupont
- Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium; Department of Chronic Diseases and Metabolism (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium
| | - L Godinas
- Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium; Department of Chronic Diseases and Metabolism (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium
| | - G M Verleden
- Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium; Department of Chronic Diseases and Metabolism (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium
| | - L J Ceulemans
- Department of Chronic Diseases and Metabolism (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium; Department of Thoracic Surgery, University Hospitals Leuven, Leuven, Belgium
| | - B M Vanaudenaerde
- Department of Chronic Diseases and Metabolism (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium
| | - R Vos
- Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium; Department of Chronic Diseases and Metabolism (CHROMETA), Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE), KU Leuven, Leuven, Belgium
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Olson R, Schlijper R, Bos S, Hamilton S, Tran E, Berthelet E, Wu J. 90-day mortality after radical radiotherapy for head and neck cancer: a population-based comparison between rural and urban patients. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2019.11.184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Schlijper R, Bos S, Hamilton S, Tran E, Berthelet E, Wu J, Olson R. 90-Day Mortality after Radical Radiotherapy for Head and Neck Cancer: A Population-Based Comparison between Rural and Urban Patients. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lisman T, Bos S, Intagliata NM. Mechanisms of enhanced thrombin-generating capacity in patients with cirrhosis. J Thromb Haemost 2018; 16:1128-1131. [PMID: 29633495 DOI: 10.1111/jth.14020] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Indexed: 12/20/2022]
Affiliation(s)
- T Lisman
- Surgical Research Laboratory and Section of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - S Bos
- Surgical Research Laboratory and Department of Internal Medicine, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - N M Intagliata
- Division of Gastroenterology and Hepatology, Center for Coagulation in Liver Disease, University of Virginia Medical Center, Charlottesville, VA, USA
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Amaral A, Soares M, Pereira A, Bos S, Roque C, Macedo A. Personality and insomnia: The role of gender. Eur Psychiatry 2017. [DOI: 10.1016/j.eurpsy.2017.01.1700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
IntroductionSeveral epidemiological studies have been conducted to document the prevalence and correlates of insomnia. Most of them confirm their high prevalence in the general population, and a gender difference in the risk for insomnia.AimsTo study the role of gender in the relationship between personality (perfectionism and neuroticism) and insomnia ([IG] insomnia group, [ISG] insomnia symptoms group, and [GSG] good sleepers group).MethodsA total of 549 college students (80.1% females) filled in the MPS (Frost et al., 1990; Hewitt and Flett, 1991), EPI (Barton et al., 1992, 1995), and a self-reported questionnaire to assess insomnia symptoms.ResultsNo differences were found between female and male samples, concerning the dimension of perfectionism – doubts about actions. The IG and the ISG showed higher levels of doubts about actions than the GSG. However, only in female sample the IG and the ISG showed higher levels of concern over mistakes in comparison with the GSG. In males, no significant differences between the sleep groups were found, in which respects concern over mistakes. The level of extroversion was higher in the GSG, but only in male sample. In females, there were no significant differences between the sleep groups in relation to extroversion.ConclusionsNo gender differences were found for the role of doubts about actions in insomnia. Only in females, the dimension – concern over mistakes is important in insomnia, and only in males the dimension – extroversion is important to have a good sleep. These results warrant further research.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Vasile M, Bruggeman M, Van Meensel S, Bos S, Laenen B. Characterization of the natural radioactivity of the first deep geothermal doublet in Flanders, Belgium. Appl Radiat Isot 2016; 126:300-303. [PMID: 28034512 DOI: 10.1016/j.apradiso.2016.12.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 11/25/2016] [Accepted: 12/19/2016] [Indexed: 10/20/2022]
Abstract
Deep geothermal energy is a local energy resource that is based on the heat generated by the Earth. As the heat is continuously regenerated, geothermal exploitation can be considered as a renewable and, depending on the techniques used, a sustainable energy production system. In September 2015, the Flemish Institute for Technological Research (VITO) started drilling an exploration well targeting a hot water reservoir at a depth of about 3km on the Balmatt site near Mol. Geothermal hot water contains naturally occurring gases, chemicals and radionuclides at variable concentrations. The actual concentrations and potentially related hazards strongly depend on local geological and hydrogeological conditions. This paper summarizes the radiological characterization of several rock samples obtained from different depths during the drilling, the formation water, the salt and the sediment fraction. The results of our analyses show low values for the activity concentration for uranium and thorium in the formation water and in the precipitate/sediment fraction. Also, the activity concentrations of 210Pb and 210Po are low in these samples and the activity concentration of 226Ra is dominant. From the analysis of the rock samples, it was found that the layer above the reservoir has a higher uranium and thorium concentration than the layer of the reservoir, which on the other hand contains more radium than the layer above it.
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Affiliation(s)
- M Vasile
- SCK-CEN, Low-Level Radioactivity Measurements, Belgium.
| | - M Bruggeman
- SCK-CEN, Low-Level Radioactivity Measurements, Belgium
| | - S Van Meensel
- VITO, Flemish Institute for Technological Research, Balmatt Geothermieproject, Belgium
| | - S Bos
- VITO, Flemish Institute for Technological Research, Balmatt Geothermieproject, Belgium
| | - B Laenen
- VITO, Flemish Institute for Technological Research, Balmatt Geothermieproject, Belgium
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Abstract
IntroductionSleep disturbance is one of the most common health complaints among late adolescents and young adults. Women report more sleep-related complaints than men (Krishnan and Collop, 2006) and more anxiety or depressive symptoms (Voderholzer et al., 2003). Higher levels of repetitive negative thinking appear to be causally involved in the initiation/maintenance of emotional problems (Ehring and Watkins, 2008).AimsTo analyze the sleep difficulties differences by gender and its associations with stress, cognitive emotion regulation, perseverative thinking and negative affect.MethodsFive hundred and forty-nine students (80.1% females) from two Universities filled in the PSS-10 (Cohen et al., 1983; Amaral et al., 2014), CERQ (Garnefski et al., 2001; Castro et al., 2013), PTQ (Ehring et al., 2011; Chaves et al., 2013) and POMS-58 (McNair et al., 1971; Azevedo et al., 1991; Amaral et al., 2013). Three questions were used to access difficulties of initiating sleep (DIS), maintaining sleep (DMS) and early morning wakening (EMA).ResultsFemales reported more sleep difficulties (excluding DIS), stress, perseverative thinking than males. Males reported higher levels in self-blame and blaming-others dimensions. In female sample we found significant correlations between all sleep difficulties and stress, perseverative thinking, emotional regulation (rumination, self-blame, catastrophizing) and negative affect. In male sample only the difficulties of initiating sleep are correlated with stress, perseverative thinking, self-blame and negative affect.ConclusionsThere are no gender differences in frequency and most of correlates of DIS. DMS and EMA were higher in females and were related to perseverative thinking and emotional regulation mechanisms in this sample.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Abstract
IntroductionPrevious suicide attempts are a consistent risk factor for suicide. Repetition has been associated with higher future morbidity and suicidality.AimTo examine the relationship between psychological variables at pregnancy and previous repetition of suicidal attempts, first attempts and absence of attempts.MethodsThe sample comprise 568 third trimester pregnant women, mean aged 29.82 years (SD = 4.55; variance = 17–44). Previous suicidal behaviors were assessed with diagnostic interview for genetic studies, depression with PDSS and BDI-II, and affect with POMS. Current suicidal thoughts were assessed with PDSS dimension; hopelessness and helplessness by summing the scores of the POMS items hopeless/gloomy; and lonely/helpless, respectively.ResultsRepeaters (R; n = 11, 1.9%) scored higher than non-repeaters (NR; n = 20, 3.5%) in most of the clinical variables, but only significantly in sleeping/eating disturbances (PDSS).R and NR when compared to women who never attempted suicide (NA; n = 535, 94.5%) both revealed significant higher levels of depressive/hostility affect (POMS), BDI-II total score, suicide ideation, guilt/shame (PDSS) and anxiety/insecurity or anxiety/somatic (PSDD or BDI-II).In comparison with NA, R also revealed significant higher levels of negative affect (POMS), PDSS total score, loss of self, mental confusion (PDSS), cognitive and affective symptoms, fatigue (BDI-II), hopelessness and helplessness. NR also differs from NA in their higher emotional liability (PDSS).ConclusionWomen with previous suicide attempts are at elevated risk for high depressive symptoms, negative affect and suicide ideation at pregnancy. Compared to never attempters, repeaters revealed high morbidity than first attempters. The intervention in pregnancy must carefully assess previous history of suicide attempts.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Vongpromek R, Bos S, Ten Kate GJR, Yahya R, Verhoeven AJM, de Feyter PJ, Kronenberg F, Roeters van Lennep JE, Sijbrands EJG, Mulder MT. Lipoprotein(a) levels are associated with aortic valve calcification in asymptomatic patients with familial hypercholesterolaemia. J Intern Med 2015; 278:166-73. [PMID: 25487646 DOI: 10.1111/joim.12335] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [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: 10/24/2022]
Abstract
OBJECTIVES Lipoprotein(a) [Lp(a)] is an independent risk factor for aortic valve stenosis and aortic valve calcification (AVC) in the general population. In this study, we determined the association between AVC and both plasma Lp(a) levels and apolipoprotein(a) [apo(a)] kringle IV repeat polymorphisms in asymptomatic statin-treated patients with heterozygous familial hypercholesterolaemia (FH). METHODS A total of 129 asymptomatic heterozygous FH patients (age 40-69 years) were included in this study. AVC was detected using computed tomography scanning. Lp(a) concentration and apo(a) kringle IV repeat number were measured using immunoturbidimetry and immunoblotting, respectively. Univariate and multivariate logistic regression were used to assess the association between Lp(a) concentration and the presence of AVC. RESULTS Aortic valve calcification was present in 38.2% of patients, including three with extensive AVC (>400 Agatston units). Lp(a) concentration was significantly correlated with gender, number of apo(a) kringle IV repeats and the presence and severity of AVC, but not with coronary artery calcification (CAC). AVC was significantly associated with plasma Lp(a) level, age, body mass index, blood pressure, duration of statin use, cholesterol-year score and CAC score. After adjustment for all significant covariables, plasma Lp(a) concentration remained a significant predictor of AVC, with an odds ratio per 10-mg dL(-1) increase in Lp(a) concentration of 1.11 (95% confidence interval 1.01-1.20, P = 0.03). CONCLUSION In asymptomatic statin-treated FH patients, plasma Lp(a) concentration is an independent risk indicator for AVC.
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Affiliation(s)
- R Vongpromek
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - S Bos
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - G-J R Ten Kate
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - R Yahya
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - A J M Verhoeven
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - P J de Feyter
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - F Kronenberg
- Division of Genetic Epidemiology, Department of Molecular and Clinical Pharmacology, Innsbruck Medical University, Innsbruck, Austria
| | - J E Roeters van Lennep
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - E J G Sijbrands
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - M T Mulder
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
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Marques M, Bos S, Pereira A, Maia B, Soares M, Valente J, Nogueira V, Madeira N, Roque C, Bajouco M, Macedo A. The POMS Factor Structure at Six and Twelve Months Postpartum. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)30806-3] [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: 11/16/2022] Open
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Macedo A, Pereira A, Soares M, Amaral A, Nogueira V, Madeira N, Roque C, Marques M, Bos S, Maia B, Pereira A. Positive Beliefs About Rumination Scale-adapted: Validation of the Portuguese Version. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)31434-6] [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: 11/26/2022] Open
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Soares M, Amaral A, Pereira A, Madeira N, Bos S, Valente J, Nogueira V, Oliveira L, Roque C, Macedo A. Prevalence of Suicidal Ideation Among Students. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)31387-0] [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: 10/23/2022] Open
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Pereira A, Marques M, Soares M, Bos S, Maia B, Valente J, Nogueira V, Roque C, Oliveira L, Madeira N, Bajouco M, Freitas V. Evolution of Depressive Symptoms From Pregnancy to the 12th Month Postpartum – a Prospective Study with Non-depressed Women. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)30214-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Pereira AT, Marques M, Soares MJ, Maia BR, Bos S, Valente J, Nogueira V, Roque C, Madeira N, Macedo A. Profile of depressive symptoms in women in the perinatal and outside the perinatal period: similar or not? J Affect Disord 2014; 166:71-8. [PMID: 25012412 DOI: 10.1016/j.jad.2014.04.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [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] [Received: 02/27/2014] [Revised: 04/07/2014] [Accepted: 04/07/2014] [Indexed: 12/21/2022]
Abstract
PURPOSES To analyze which Beck Depression Inventory-II (BDI-II) and Postpartum Depression Screening Scores (PDSS) total and dimensional scores, as well as symptomatic answers proportions significantly differ between women in the perinatal period (pregnant/postpartum) without major depression, with major depression and women outside the perinatal period. METHODS 572 pregnant women in the third trimester completed Beck Depression Inventory-II and Postpartum Depression Screening Scale and were assessed with the Diagnostic Interview for Genetic Studies. 417 of these were also assessed (with the same instruments) at three months postpartum. Ninety non-pregnant women or that did not have a child in the last year (mean age=29.42±7.159 years) also filled in the questionnaires. RESULTS Non-depressed pregnant women showed lower scores than depressed pregnant women and higher scores than women outside the perinatal period in the BDI-II total score and in its Somatic-Anxiety dimension. Non-depressed postpartum women showed significantly higher scores than women outside the perinatal period only at Sleep/Eating Disturbances. Compared to women outside the perinatal period, pregnant women without depression presented higher scores only in the somatic items. Women with vs. without depression in the postpartum period did not significantly differ and both presented higher scores than women outside the perinatal period in the proportions of loss of energy and sleep changes. LIMITATIONS Women outside the perinatal period were not diagnosed for the presence of a depressive disorder, but their BDI-II mean score was similar to the figures reported worldwide regarding women in childbearing age. CONCLUSION In the perinatal period, most particularly at pregnancy, women experience significant somatic changes even if not clinically depressed. Cognitive-affective symptoms are more useful when assessing the presence of perinatal depression.
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Affiliation(s)
- A T Pereira
- Department of Psychological Medicine, Faculty of Medicine, University of Coimbra, Portugal.
| | - M Marques
- Miguel Torga Higher Institute, Coimbra, Portugal
| | - M J Soares
- Department of Psychological Medicine, Faculty of Medicine, University of Coimbra, Portugal
| | - B R Maia
- Oporto Higher Institute of Social Work, Porto, Portugal
| | - S Bos
- Department of Psychological Medicine, Faculty of Medicine, University of Coimbra, Portugal
| | - J Valente
- Department of Psychological Medicine, Faculty of Medicine, University of Coimbra, Portugal
| | - V Nogueira
- Department of Psychological Medicine, Faculty of Medicine, University of Coimbra, Portugal
| | - C Roque
- Department of Psychological Medicine, Faculty of Medicine, University of Coimbra, Portugal
| | - N Madeira
- Department of Psychological Medicine, Faculty of Medicine, University of Coimbra, Portugal
| | - A Macedo
- Department of Psychological Medicine, Faculty of Medicine, University of Coimbra, Portugal
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Yahya R, Favari E, Bos S, Vongpromek R, van der Zee L, Touw A, Zimetti F, Adorn M, Bernini F, Verhoeven A, Sijbrands E, Mulder M, Roeters van Lennep J. Treatment of a compound heterozygous familial hypercholesterolemia patient with lomitapide. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.788] [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: 11/29/2022]
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Bos S, Yayha R, van den Oord S, Schinkel A, Sijbrands E, Mulder M, Roeters van Lennep J. LP(a) is not associated with c-imt or the presence of carotid plaques in statin treated fh or fch patients. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.477] [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: 10/25/2022]
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Soares M, Madeira N, Roque C, Pereira A, Marques M, Bos S, Maia B, Amaral A, Valente J, Nogueira V, Macedo A. EPA-1705 – Perinatal depression and depressive symptoms in Portuguese and immigrant women. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78846-7] [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: 11/24/2022] Open
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Pereira A, Marques M, Bos S, Soares M, Maia B, Nogueira V, Madeira N, Roque C, Macedo A. EPA-1658 – Do non-perinatal and perinatal childbearing age women differ in the structure of depressive symptoms? Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78803-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Bos S, Ten Kate GJR, Sijbrands EJG, Mulder MT, Roeters Van Lennep JE. The effect of LP(a) in patients with heterozygous familial hypercholesterolemia on coronary plaque burden and calcium score determined by CT. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p5174] [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: 11/14/2022] Open
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Soares M, Pereira A, Marques M, Bos S, Valente J, Nogueira V, Roque C, Madeira N, Macedo A. 2211 – Are lifetime self-reported health (SRH), sleep difficulties, and negative affect correlates of suicidal ideation in pregnancy and postpartum? Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)77084-6] [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: 11/30/2022] Open
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Roque C, Pereira A, Marques M, Soares M, Maia B, Bos S, Azevedo M, Valente J, Nogueira V, Madeira N, Macedo A. 1049 – Correlates of postpartum depressive symptomatology. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76170-4] [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: 10/26/2022] Open
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Soares M, Marques M, Pereira A, Maia B, Bos S, Valente J, Azevedo M, Macedo A. 1635 – The correlates of positive affect in pregnancy and postpartum. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76626-4] [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: 10/26/2022] Open
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Marques M, Pereira A, Maia B, Bos S, Soares M, Valente J, Nogueira V, Madeira N, Roque C, Pinto de Azevedo H, Macedo A. 1229 – What about antenatal depressive symptoms correlates/risk factors? Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76307-7] [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: 10/26/2022] Open
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Pereira A, Bos S, Marques M, Soares M, Maia B, Valente J, Nogueira V, Macedo A, Azevedo M. P-1476 - Development and validation of the portuguese short version of the postpartum depression screening scale to screen for antenatal depression. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)75643-2] [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] Open
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Bento C, Pereira A, Saraiva J, Marques M, Soares M, Bos S, Valente J, Macedo A, Azevedo M. P-557 - Children's eating attitudes test: psychometric characteristics in a portuguese adolescent girls sample. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)74724-7] [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: 11/25/2022] Open
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Macedo A, Marques M, Bos S, Maia B, Pereira T, Soares M, Valente J, Gomes A, Nogueira V, Azevedo M. Mother's personality and infant temperament. Infant Behav Dev 2011; 34:552-68. [DOI: 10.1016/j.infbeh.2011.06.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Revised: 09/30/2010] [Accepted: 06/27/2011] [Indexed: 10/17/2022]
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Pereira A, Bos S, Maia B, Marques M, Soares M, Gomes A, Valente J, Nogueira V, Macedo A, Azevedo M. The Portuguese short version of the postpartum depression screening scale. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)73384-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
IntroductionScreening for perinatal depression is essential. The Postpartum Depression Screening Scale (PDSS; Beck & Gable, 2002) is a self-report instrument, composed of 35 items. The Portuguese version of the PDSS revealed to be a valid instrument to screen for perinatal depression (Pereira et al., 2010a,b).ObjectivesTo develop PDSS short version and to determine its cut-off points and associated conditional probabilities to screen for depression according to DSM-IV and ICD-10 criteria.MethodsParticipants were 452 women in their third month post-partum (M = 13.07 weeks post-partum; SD = 1.808). All women completed the Portuguese PDSS and were interviewed using the Mood Disorders Section/Diagnostic Interview for Genetic Studies. To select items for the short version the items that showed the highest correlations with their respective seven dimension scores were retained. ROC analysis was applied and both cut-off points and associated conditional probabilities adjusted to the real prevalence were determined.ResultsFor major depression/DSM-IV the cut-off point of 15, resulted in sensitivity of 77.8%, specificity of 88.9%, positive predictive value (PPV) of 21.7% and negative predictive value (NPV) of 98.9%; for depressive disorder/ICD-10 the cut-off point of 14 determined sensitivity 77.3%, specificity 84.0%, PPV 19.7%, NPV 98.6%; for mild/moderate depression with somatic syndrome or severe depression without psychotic symptoms/ICD-10 the cut-off point of 18 was associated to sensitivity 91.7%, specificity 94.5%, PPV 31.4% and NPV 99.8%.ConclusionsThe Portuguese short version of PDSS is a good alternative to the 35-items version, equally valid and precise, but more economic, faster and easier.
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Bento C, Pereira AT, Maia B, Marques M, Soares MJ, Bos S, Valente J, Gomes A, Azevedo MHP, Macedo A. Perfectionism and eating behaviour in Portuguese adolescents. Eur Eat Disorders Rev 2010; 18:328-37. [DOI: 10.1002/erv.981] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Azevedo M, Bos S, Maia B, Pereira A, Marques M, Soares M, Valente J, Macedo A. P0051 Sleep disturbances in late pregnancy. Sleep Med 2007. [DOI: 10.1016/s1389-9457(07)70310-6] [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: 10/23/2022]
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Hodeau JL, Bos S, Favre-Nicolin V, Grenier S, Renevier H, Lorenzo E, Berar JF. On the importance of the 'smooth' energy variation in resonant diffraction spectra. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302094783] [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] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Bol MG, Baak JP, de Bruin PC, Rep S, Marx W, Bos S, Kisman O. Improved objectivity of grading of T(A,1) transitional cell carcinomas of the urinary bladder by quantitative nuclear and proliferation related features. J Clin Pathol 2001; 54:854-9. [PMID: 11684720 PMCID: PMC1731323 DOI: 10.1136/jcp.54.11.854] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM To analyse whether the mean nuclear area of the 10 largest nuclei (MNA-10), the mitotic activity index (MAI), and Ki-67 immunoquantitative features have additional value to discriminate different grades of T(A,1) transitional cell carcinoma (TCC) of the urinary bladder. MATERIALS/METHODS One hundred and fifty of 200 consecutive cases (75%) showing interobserver agreement on duplicate blind grade assessment by independent pathologists were studied. Using random numbers, the 150 cases were divided into sets for learning (n = 75) and testing (n = 75). Single and multivariate analyses were applied to discriminate the different grades in the learning set. The multivariate classifier developed in this way was evaluated in the test set (n = 75). RESULTS With the MNA-10 alone, using the classification MNA-10 < 80 microm(2) = grade 1, 80 microm(2) < MNA-10 < 130 microm(2) = grade 2, MNA-10 > 130 microm(2) = grade 3, 71% of all 150 cases were correctly classified (69% of grade 1 v grade 2 and 76% of grade 2 v grade 3). With multivariate analysis, the best discriminating features in the learning set (17 grade 1, 30 grade 2, and 28 grade 3) between grades 1 and 2 were MNA-10 and MAI, and between grades 2 and 3 MAI and Ki-67. With these features, 94% of grade 1 v grade 2 and 97% of grade 2 v grade 3 were correctly classified in the learning set (overall, 95% correct, none of the grade 3 cases misclassified). In the test set the classification results were similar. When the three grades were entered at the same time for discrimination, Ki-67 area % and MAI was the best discriminating combination, both in the sets for learning and testing. Overall correct classification results in the sets for learning and testing were slightly lower, but still 94% and 92%. Most importantly, none of the grade 3 cases was misclassified; the classification shifts all occurred between grades 1 and 2. CONCLUSIONS The combination of MNA-10, MAI, and Ki-67 gives much better discrimination between grades 1, 2, and 3 in T(A,1) TCC of the urinary bladder than MNA-10 alone. The similarity of the classification results of the learning set and test set are encouraging and this quantitative pathological grading model should be applied in a prospective study.
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Affiliation(s)
- M G Bol
- Department of Pathology, Medical Centre Alkmaar, Alkmaar 1814JD, The Netherlands
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Favre-Nicolin V, Bos S, Lorenzo JE, Hodeau JL, Berar JF, Monceau P, Currat R, Levy F, Berger H. Structural evidence for Ta-tetramerization displacements in the charge-density-wave compound (TaSe4)2I from x-ray anomalous diffraction. Phys Rev Lett 2001; 87:015502. [PMID: 11461473 DOI: 10.1103/physrevlett.87.015502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2001] [Indexed: 05/23/2023]
Abstract
We use the anomalous x-ray diffraction technique to investigate the nature of the tantalum displacement pattern in the modulated phase of the charge-density-wave compound (TaSe4)2I. In addition to the known acousticlike modulation, we find the first direct evidence for the condensation of opticlike Ta displacements along the metallic chains corresponding to an LLSS pattern of long and short in-chain Ta-Ta distances (Ta-tetramerization modes). This result confirms a previous model in which the interaction of the electronically coupled optic modes with long-wavelength acoustic shear modes leads to the condensation of a modulation of mixed character.
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Affiliation(s)
- V Favre-Nicolin
- Laboratoire de Cristallographie-CNRS, BP 166, 38042 Grenoble Cedex 9, France
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Affiliation(s)
- J L Hodeau
- Laboratoire de Cristallographie-CNRS, Associe a l'Université Joseph Fourier, 25 Avenue des Martyrs, BP 166, F-38042 Grenoble, France.
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Bos S, Renevier H, Joly Y, Favre-Nicolin V, Lorenzo E, Berar JF, Hodeau JL, Cajipe V, Leone P, Gueho C, Vaughan G. Application of D.A.N.E.S. studies to highly Absorbing Powdered Samples. Acta Crystallogr A 2000. [DOI: 10.1107/s010876730002506x] [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] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Favre-Nicolin V, Bos S, Lorenzo E, Berar JF, Hodeau JL, Currat R. Anomalous diffraction study of quasi-1D compound (TaSe 4) 2I. Acta Crystallogr A 2000. [DOI: 10.1107/s0108767300023643] [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] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Shepard W, Favre-Nicolin V, Chesne ML, Abergel C, Bos S, Chantalat L, Kahn R, Lorenzo E, Natali F, Neisius T, Pascarelli S, Vicat J, Hodeau JL. Investigations into the use of Dispersive-Mode Anomalous Scattering in Macromolecular Crystallography. Acta Crystallogr A 2000. [DOI: 10.1107/s0108767300025034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Favre-Nicolin V, Bos S, Lorenzo JE, Bordet P, Shepard W, Hodeau JL. Integration procedure for the quantitative analysis of dispersive anomalous diffraction. J Appl Crystallogr 2000. [DOI: 10.1107/s0021889899012364] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The development of the energy/angular dispersive diffraction setup, which can be used for anomalous diffraction, allows the collection of diffracted intensities around an absorption edge, either over a continuous energy range [for DAFS (diffraction anomalous fine structure) studies], or at discrete energies [for simultaneous MAD (multiwavelength anomalous diffraction) studies]. Used with a large two-dimensional detector and an oscillating single crystal, this setup allows simultaneous collection of many reflections for a given energy range. An integration procedure has been developed along with a program,DAD(dispersive anomalous diffraction), for the collection and analysis of the raw images, to yield finally data in the formI(h, k, l, λ) for all reflections. Wavelength calibration and intensity corrections are made during the integration process, and parameters that may be needed in later stages of the analysis are extracted and referenced within the integrated data. A general procedure to calculate the positions of diffracted reflections, for a monochromatic oscillation scan with a two-dimensional detector, when the incident beam is not perpendicular to the oscillation axis, is also described.
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Abstract
Nursing students often do not get the chance to practice the skills they need as nurses prior to graduation. Many of the required skills are difficult to teach using traditional classroom or clinical teaching methods. Peer leadership is one teaching method that may provide alternative learning opportunities for enhancing these professional nursing skills, and it encompasses the notions of peer teaching and peer supervision simultaneously. The purpose of this study was to describe what junior baccalaureate nursing students perceived as the benefits of a peer leadership experience, using Loving's Competence Validation Model as the theoretical framework. Twelve junior nursing students participated during their adult medical-surgical rotation and completed self-evaluations following the peer leadership experience. From analysis of these self-evaluations, responses were categorized into five perceived benefits: practice in prioritizing, enhancement of critical thinking skills, enhancement of technical skills, realization of peers as resources, and development of management skills.
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Affiliation(s)
- S Bos
- University of Michigan School of Nursing, Ann Arbor, USA
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