802 results on '"Bäckström P"'
Search Results
52. In the need of a digital cicerone in healthcare? – Guidance for parents
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Bäckström, C, Knez, R, Fahlgren, M, Synnergren, M, and Larsson, V
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- 2022
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53. Workplace incivility as a risk factor for workplace bullying and psychological well-being: a longitudinal study of targets and bystanders in a sample of swedish engineers
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Holm, Kristoffer, Torkelson, Eva, and Bäckström, Martin
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- 2022
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54. A cohort study of trauma patients in Sweden during the first months of the COVID-19 pandemic: a small reduction in trauma admissions
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Denise Bäckström and Andreas Wladis
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COVID-19 ,Pandemic ,Trauma ,Sweden ,Scandinavia ,Injuries ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Abstract Background Given that Swedish authorities have been widely viewed as having practiced an unusual approach to the COVID-19 pandemic and given that Sweden is notable for a low incidence of trauma, we wanted to learn how the pandemic may have affected the number of trauma admissions in Sweden. Methods We conducted a retrospective cohort study based on the Swedish trauma registry (Svenska Traumaregistret). The study period was March 1, 2020 to June 30, 2020. As a basis for comparison, the record for the same time during the previous year, 2019 was used. Results During the four months of the first wave of COVID-19, 2020 there was a decline of 24.2% in the total number of trauma patients in Sweden. There was no significant change in 30-day mortality rates, 4.7% 2019 and 5.1% 2020, (p = 0.30). The number of injuries per patient was higher during the pandemic 3.8 injuries 2019 and 4.1 injuries 2020 (p = 0.02). The NISS 6, 2019 and 8, 2020 was higher during the pandemic. Conclusions As a consequence of what were seen by many as all too lenient actions taken to deal with COVID-19 in Sweden during spring 2020, there was still a reduction in trauma admissions most likely due to an adherence to the voluntary recommendations, the reduction was not as prominent as what was seen in many countries with harsher restrictions and lockdowns.
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- 2022
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55. Recent Outcomes Research in Helicopter Emergency Medical Services: A Scoping Review of Publication Year 2023 Additions to the Helicopter Outcomes Assessment Research Database.
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Fritz, Christie, Rudman, Jordan, Thomas, Sarah Alice, McCartin, Michael, Price, James, Shecter, Jonathan, Bäckström, Denise, and Thomas, Stephen H.
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• Most 2023 helicopter emergency medical services (HEMS) versus ground emergency medical services publications focus on trauma and mostly from North America. • Most HEMS studies use mortality, but safety has emerged as a new study end point. • HEMS versus ground-based emergency medical services publications from 2023 have a similar focus to the past. The purpose of this scoping review was to identify and characterize helicopter emergency medical services (HEMS) outcomes literature from 2023, with the goal of describing updates to the Critical Care Transport Collaborative Outcomes Research Effort HEMS Outcomes Assessment Research Database (HOARD). Using Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews guidelines, a multireviewer approach was used to source and review articles published or in preprint databases from 2023. The articles included assessed a patient-centered outcome for HEMS versus a non-HEMS control group. Article characteristics included the journal impact factor (JIF), diagnostic group (trauma or nontrauma), and geographic origin. Categoric analyses comparing 2023 studies with HOARD studies from the previous decade (2013-2022) were executed with the Fisher exact test; nonnormal JIF data were described using median and interquartile range and analyzed (vs 2013-2022) with rank sum testing. Of the initial records (N = 4,486), 4,410 were screened out, leaving 76 for full-text review. Of these, 58 were discarded, and 18 were classified as eligible for addition to HOARD. Most studies (14/18, 78%) focused on trauma, and an equally high proportion (14/18, 78%) came from North America. The median JIF was 2.4 (interquartile range, 1.2-3.6). Compared with HOARD studies from the previous decade, 2023 studies were similar with respect to diagnostic focus (P =.779), geographic origin (P =.171), and JIF (P =.531). This scoping review provides information on 18 HEMS outcomes studies new to the evidence base in 2023. [ABSTRACT FROM AUTHOR]
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- 2024
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56. The concept, importance and values of support during childbearing and breastfeeding – A discourse paper
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Anette Ekström‐Bergström, Stina Thorstensson, and Caroline Bäckström
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birth ,clinical practice ,family ,fathers ,healthcare organizations ,labour ,Nursing ,RT1-120 - Abstract
Abstract Background Professional support in childbearing has beneficial effects on childbirth experience, interactions within the family, breastfeeding and medical outcomes. However, more knowledge is needed about prerequisites for professional support to be valuable and satisfactory during childbearing. Aim The aim of this discourse paper is to describe and explore prerequisites for professional support that are of value for women and their families during childbearing as well as how healthcare organizations can be formed to facilitate these prerequisites. Design Discourse paper. Methods This discourse paper is based on our own experiences and is supported by literature and theory. Results Well‐functioning structures and processes facilitate professional support that leads to safe, secure, calm and prepared parents with the ability to handle the challenges of childbearing and parenting. When organizing care in childbearing, prerequisites for support needs must also be considered.
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- 2022
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57. Screening for potential undiagnosed Gaucher disease patients: Utilisation of the Gaucher earlier diagnosis consensus point-scoring system (GED-C PSS) in conjunction with electronic health record data, tissue specimens, and small nucleotide polymorphism (SNP) genotype data available in Finnish biobanks
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Minja Pehrsson, Hanna Heikkinen, Ulla Wartiovaara-Kautto, Sampo Mäntylahti, Pia Bäckström, Mariann I. Lassenius, Kristiina Uusi-Rauva, Olli Carpén, and Kaisa Elomaa
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Biobank study ,Electronic health record data ,Small nucleotide polymorphism chip genotype data ,Gaucher disease ,Gaucher earlier diagnosis consensus point-scoring system ,GBA ,Medicine (General) ,R5-920 ,Biology (General) ,QH301-705.5 - Abstract
Background: Autosomal recessive Gaucher disease (GD) is likely underdiagnosed in many countries. Because the number of diagnosed GD patients in Finland is relatively low, and the true prevalence is currently not known, it was hypothesized that undiagnosed GD patients may exist in Finland. Our previous study demonstrated the applicability of Gaucher Earlier Diagnosis Consensus point-scoring system (GED-C PSS; Mehta et al., 2019) and Finnish biobank data and specimens in the automated point scoring of large populations. An indicative point-score range for Finnish GD patients was determined, but undiagnosed patients were not identified partly due to high number of high-score subjects in combination with a lack of suitable samples for diagnostics in the assessed biobank population. The current study extended the screening to another biobank and evaluated the feasibility of utilising the automated GED-C PSS in conjunction with small nucleotide polymorphism (SNP) chip genotype data from the FinnGen study of biobank sample donors in the identification of undiagnosed GD patients in Finland. Furthermore, the applicability of FFPE tissues and DNA restoration in the next-generation sequencing (NGS) of the GBA gene were tested. Methods: Previously diagnosed Finnish GD patients eligible to the study, and up to 45,100 sample donors in Helsinki Biobank (HBB) were point scored. The GED-C point scoring, adjusted to local data, was automated, but also partly manually verified for GD patients. The SNP chip genotype data for rare GBA variants was visually assessed. FFPE tissues of GD patients were obtained from HBB and Biobank Borealis of Northern Finland (BB). Results: Three previously diagnosed GD patients and one patient previously treated for GD-related features were included. A genetic diagnosis was confirmed for the patient treated for GD-related features. The GED-C point score of the GD patients was 12.5–22.5 in the current study. The score in eight Finnish GD patients of the previous and the current study is thus 6–22.5 points per patient. In the automated point scoring of the HBB subpopulation (N ≈ 45,100), the overall scores ranged from 0 to 17.5, with 0.77% (346/45,100) of the subjects having ≥10 points. The analysis of SNP chip genotype data was able to identify the diagnosed GD patients, but potential undiagnosed patients with the GED-C score and/or the GBA genotype indicative of GD were not discovered. Restoration of the FFPE tissue DNA improved the quality of the GBA NGS, and pathogenic GBA variants were confirmed in five out of six unrestored and in all four restored FFPE DNA samples. Discussion: These findings imply that the prevalence of diagnosed patients (~1:325,000) may indeed correspond the true prevalence of GD in Finland. The SNP chip genotype data is a valuable tool that complements the screening with the GED-C PSS, especially if the genotyping pipeline is tuned for rare variants. These proof-of-concept biobank tools can be adapted to other rare genetic diseases.
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- 2022
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58. Spectral edge frequency during general anaesthesia: A narrative literature review
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Pether Jildenstål, Amanda Bäckström, Klara Hedman, and Margareta Warrén-Stomberg
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Medicine (General) ,R5-920 - Abstract
Previous studies have attempted to determine the depth of anaesthesia with different anaesthetic agents using electroencephalogram (EEG) measurements with variable success. Measuring depth of anaesthesia is confounded by the complexity of the EEG and the fact that different agents create different pattens. A narrative review was undertaken to examine the available research evidence on the effect and reliability of spectral edge frequency (SEF) for assessing the depth of anaesthesia in adult patients under general anaesthesia. A systematic search of the PubMed®, Scopus®, CINAHL and Cochrane databases identified six randomized controlled trials and five observational studies. The findings of these studies suggest that SEF varies according to the anaesthetic drugs used. Remifentanil and age are two factors that can affect SEF, while other opioids and benzodiazepine (administered separately) seem to have no effect. No patients experienced intraoperative awareness. However, this does not indicate that SEF can provide full protection against it and the number of articles in which intraoperative awareness was studied was too small to afford any certainty. None of the studies demonstrated a reliable SEF interval associated with adequate general anaesthesia. SEF must be adapted to the anaesthetic drug used, the patient’s age and state while under general anaesthesia.
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- 2022
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59. School Composition, Disruptive Classroom Behaviour and Student Results: A Study of Mechanisms of Peer Effects
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Pontus Bäckström
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peer effects ,compositional effects ,school environment ,disruptive classroom behaviour ,frame factor theory ,Education (General) ,L7-991 - Abstract
This study analyses whether disruptive classroom behaviour affects students’ results in Swedish lower secondary schools (N = 1704), measured by the schools’ grade point averages (GPA). The data, collected from the Swedish school authorities, comprises variables on schools’ pupil composition, classroom environment and student mean grades. Previous research has shown that disruptive classroom behaviour has a negative impact on students’ results. This study finds such effects. The effect size reported is equal to the reported GPA differences between boys and girls. Results show that some of the original effects of school compositional variables are mediated through disruptive behaviour.
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- 2021
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60. Asgard archaea illuminate the origin of eukaryotic cellular complexity
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Zaremba-Niedzwiedzka, Katarzyna, Caceres, Eva F, Saw, Jimmy H, Bäckström, Disa, Juzokaite, Lina, Vancaester, Emmelien, Seitz, Kiley W, Anantharaman, Karthik, Starnawski, Piotr, Kjeldsen, Kasper U, Stott, Matthew B, Nunoura, Takuro, Banfield, Jillian F, Schramm, Andreas, Baker, Brett J, Spang, Anja, and Ettema, Thijs JG
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Generic health relevance ,Archaea ,Archaeal Proteins ,Biological Transport ,COP-Coated Vesicles ,Eukaryota ,Eukaryotic Cells ,Evolution ,Molecular ,Genome ,Archaeal ,Metagenomics ,Models ,Biological ,Phylogeny ,General Science & Technology - Abstract
The origin and cellular complexity of eukaryotes represent a major enigma in biology. Current data support scenarios in which an archaeal host cell and an alphaproteobacterial (mitochondrial) endosymbiont merged together, resulting in the first eukaryotic cell. The host cell is related to Lokiarchaeota, an archaeal phylum with many eukaryotic features. The emergence of the structural complexity that characterizes eukaryotic cells remains unclear. Here we describe the 'Asgard' superphylum, a group of uncultivated archaea that, as well as Lokiarchaeota, includes Thor-, Odin- and Heimdallarchaeota. Asgard archaea affiliate with eukaryotes in phylogenomic analyses, and their genomes are enriched for proteins formerly considered specific to eukaryotes. Notably, thorarchaeal genomes encode several homologues of eukaryotic membrane-trafficking machinery components, including Sec23/24 and TRAPP domains. Furthermore, we identify thorarchaeal proteins with similar features to eukaryotic coat proteins involved in vesicle biogenesis. Our results expand the known repertoire of 'eukaryote-specific' proteins in Archaea, indicating that the archaeal host cell already contained many key components that govern eukaryotic cellular complexity.
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- 2017
61. Groundwater chemistry affected by trace elements (As, Mo, Ni, U and V) from a burning alum shale waste deposit, Kvarntorp, Sweden
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Åhlgren, Kristina, Sjöberg, Viktor, Allard, Bert, and Bäckström, Mattias
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- 2021
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62. Surgical Needs at the End of the Battle of Mosul: Results from Mosul General Hospital
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Bäckström, Fredrik, Bäckström, Denise, Sadi, Lin, Andersson, Peter, and Wladis, Andreas
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- 2020
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63. Patients’ Perspectives on Coming Off Opioid Agonist Treatment: A Qualitative Study
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Christina Nehlin, Josefin Bäckström, Charlotte Wollert Brander, and Caisa Öster
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Public aspects of medicine ,RA1-1270 - Abstract
Aims: Opioid agonist treatment (OAT) programs are life-saving, as they reduce opioid use, overdoses, and criminal activities. Disadvantages reported with long-term OAT include side effects of the medication, especially on cognitive ability and sexual function, which may discourage potential participants. Many of those who participate in OAT have a desire to come off treatment. The aims of this study were to explore patients’ thoughts about coming off OAT and to investigate their perceptions of what support they would need in order to realize a planned withdrawal from OAT. Methods: A qualitative interview study with semi-structured interviews, using applied thematic analysis. Persons with experiences of participating in OAT were invited from Swedish programs and a private Facebook community. Results: Fifteen persons, with a mean of 9.6 (±6.4) years of treatment experience, were included. The participants underlined the need for a patient-centered focus within the treatment. They wanted to be regarded as capable of deciding if, when, and how a planned ending was to take place. They also called for staff to be supportive in making such decisions. Participants recommended staff to be sensitive to the needs of the specific patient and to have strategies for coming off OAT that could be adjusted for the single person. Conclusions: OAT programs need to be continually updated and adapted to the persons who can benefit from them. Applying a person-centered, holistic perspective would enhance the quality of the treatment by emanating from individual goals. Regulatory guidelines need to take into account research on patient experiences and perspectives on coming off.
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- 2022
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64. Standardization of Antigen-Emulsion Preparations for the Induction of Autoimmune Disease Models
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Louise M. Topping, Laura Romero-Castillo, Vilma Urbonaviciute, Hans Bolinsson, Felix I. Clanchy, Rikard Holmdahl, B. Thomas Bäckström, and Richard O. Williams
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autoimmunity ,animal disease models ,EAE ,CIA ,antigen emulsions ,Complete Freund’s Adjuvant ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Autoimmune murine disease models are vital tools for identifying novel targets and finding better treatments for human diseases. Complete Freund’s adjuvant is commonly used to induce disease in autoimmune models, and the quality of the adjuvant/autoantigen emulsion is of critical importance in determining reproducibility. We have established an emulsification method using a standard homogenizer and specially designed receptacle. Emulsions are easy to prepare, form stable and uniform water-in-oil particles, are faster to make than the traditional syringe method, use less material and are designed to fill syringes with ease. In the present study, we have validated the emulsions for induction of experimental autoimmune encephalitis, collagen II induced arthritis, antigen induced arthritis, and delayed type hypersensitivity models. These models were induced consistently and reproducibly and, in some cases, the new method outperformed the traditional method. The method described herein is simple, cost-effective and will reduce variability, thereby requiring fewer animals for in vivo research involving animal models of autoimmune disease and in vaccine development.
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- 2022
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65. Inducing synthetic lethality for selective targeting of acute myeloid leukemia cells harboring STAG2 mutations
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Agatheeswaran Subramaniam, Carl Sandén, Larissa Moura-Castro, Kristijonas Žemaitis, Ludwig Schmiderer, Aurelie Baudet, Alexandra Bäckström, Elin Arvidsson, Simon Hultmark, Natsumi Miharada, Mattias Magnusson, Kajsa Paulsson, Thoas Fioretos, and Jonas Larsson
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Diseases of the blood and blood-forming organs ,RC633-647.5 - Published
- 2022
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66. Expecting parents’ perceptions of the digital parental support 'childbirth journey' constructed as a serious game—an intervention study
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Caroline Bäckström, Tanja Rolfson, Henrik Engström, Rajna Knez, and Margaretha Larsson
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Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Objective The aim of this study was to explore expecting parents’ perceptions of the Childbirth Journey as an intervention that includes medical information for parental support, constructed as a serious game. Methods In this qualitative study, semi-structured interviews were held with expecting parents in Sweden who were able to talk about specific parts of the Childbirth Journey they appreciated or found difficult to understand. A phenomenographic methodology was employed for data analysis. Results Participants perceived the Childbirth Journey to be easily accessible and customized with reliable information. The design and features of the intervention were perceived by the expecting parents to enhance the intervention’s usability, appeal, and trustworthiness. When parental couples used the Childbirth Journey together, it gave them an opportunity to discuss and better understand each other’s situation. The participants proposed several changes to the existing version of the game, mostly related to extending practical information and illustrated scenarios but also to the further development of the game’s design and animations. The participants found the Knowledge portal to be the most appealing part of the Childbirth Journey. Conclusions The Childbirth Journey intervention was concluded to be a valuable digital complement to in-person professional support, especially given the current COVID-19 pandemic restrictions in place in Sweden, which do not allow antenatal visits by partners. However, in its current form, the Childbirth Journey has some deficiencies and would therefore benefit from further development and exploration.
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- 2022
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67. Longitudinal Outcomes of Witnessed Workplace Incivility: a Three-Wave Full Panel Study Exploring Mediators and Moderators
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Holm, Kristoffer, Torkelson, Eva, and Bäckström, Martin
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- 2021
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68. Spatiotemporal dissection of the cell cycle with single-cell proteogenomics
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Mahdessian, Diana, Cesnik, Anthony J., Gnann, Christian, Danielsson, Frida, Stenström, Lovisa, Arif, Muhammad, Zhang, Cheng, Le, Trang, Johansson, Fredric, Schutten, Rutger, Bäckström, Anna, Axelsson, Ulrika, Thul, Peter, Cho, Nathan H., Carja, Oana, Uhlén, Mathias, Mardinoglu, Adil, Stadler, Charlotte, Lindskog, Cecilia, Ayoglu, Burcu, Leonetti, Manuel D., Pontén, Fredrik, Sullivan, Devin P., and Lundberg, Emma
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- 2021
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69. The design of the PRINCESS 2 trial: A randomized trial to study the impact of ultrafast hypothermia on complete neurologic recovery after out-of-hospital cardiac arrest with initial shockable rhythm.
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Dillenbeck, Emelie, Hollenberg, Jacob, Holzer, Michael, Busch, Hans-Jörg, Nichol, Graham, Radsel, Peter, Belohlavec, Jan, Torres, Ervigio Corral, López-de-Sa, Esteban, Rosell, Fernando, Ristagno, Giuseppe, Forsberg, Sune, Annoni, Filippo, Svensson, Leif, Jonsson, Martin, Bäckström, Denise, Gellerfors, Mikael, Awad, Akil, Taccone, Fabio S, and Nordberg, Per
- Abstract
Delayed hypothermia, initiated after hospital arrival, several hours after cardiac arrest with 8-10 hours to reach the target temperature, is likely to have limited impact on overall survival. However, the effect of ultrafast hypothermia, i.e., delivered intra-arrest or immediately after return of spontaneous circulation (ROSC), on functional neurologic outcome after out-of-hospital cardiac arrest (OHCA) is unclear. In two prior trials, prehospital trans-nasal evaporative intra-arrest cooling was safe, feasible and reduced time to target temperature compared to delayed cooling. Both studies showed trends towards improved neurologic recovery in patients with shockable rhythms. The aim of the PRINCESS2-study is to assess whether cooling, initiated either intra-arrest or immediately after ROSC, followed by in-hospital hypothermia, significantly increases survival with complete neurologic recovery as compared to standard normothermia care, in OHCA patients with shockable rhythms. In this investigator-initiated, randomized, controlled trial, the emergency medical services (EMS) will randomize patients at the scene of cardiac arrest to either trans-nasal cooling within 20 minutes from EMS arrival with subsequent hypothermia at 33°C for 24 hours after hospital admission (intervention), or to standard of care with no prehospital or in-hospital cooling (control). Fever (>37,7°C) will be avoided for the first 72 hours in both groups. All patients will receive post resuscitation care and withdrawal of life support procedures according to current guidelines. Primary outcome is survival with complete neurologic recovery at 90 days, defined as modified Rankin scale (mRS) 0-1. Key secondary outcomes include survival to hospital discharge, survival at 90 days and mRS 0-3 at 90 days. In total, 1022 patients are required to detect an absolute difference of 9% (from 45 to 54%) in survival with neurologic recovery (80% power and one-sided α=0,025, β=0,2) and assuming 2,5% lost to follow-up. Recruitment starts in Q1 2024 and we expect maximum enrolment to be achieved during Q4 2024 at 20-25 European and US sites. This trial will assess the impact of ultrafast hypothermia applied on the scene of cardiac arrest, as compared to normothermia, on 90-day survival with complete neurologic recovery in OHCA patients with initial shockable rhythm. NCT06025123. [ABSTRACT FROM AUTHOR]
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- 2024
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70. Combined lentiviral- and RNA-mediated CRISPR/Cas9 delivery for efficient and traceable gene editing in human hematopoietic stem and progenitor cells
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David Yudovich, Alexandra Bäckström, Ludwig Schmiderer, Kristijonas Žemaitis, Agatheeswaran Subramaniam, and Jonas Larsson
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Medicine ,Science - Abstract
Abstract The CRISPR/Cas9 system is a versatile tool for functional genomics and forward genetic screens in mammalian cells. However, it has been challenging to deliver the CRISPR components to sensitive cell types, such as primary human hematopoietic stem and progenitor cells (HSPCs), partly due to lentiviral transduction of Cas9 being extremely inefficient in these cells. Here, to overcome these hurdles, we developed a combinatorial system using stable lentiviral delivery of single guide RNA (sgRNA) followed by transient transfection of Cas9 mRNA by electroporation in human cord blood-derived CD34+ HSPCs. We further applied an optimized sgRNA structure, that significantly improved editing efficiency in this context, and we obtained knockout levels reaching 90% for the cell surface proteins CD45 and CD44 in sgRNA transduced HSPCs. Our combinatorial CRISPR/Cas9 delivery approach had no negative influence on CD34 expression or colony forming capacity in vitro compared to non-treated HSPCs. Furthermore, gene edited HSPCs showed intact in vivo reconstitution capacity following transplantation to immunodeficient mice. Taken together, we developed a paradigm for combinatorial CRISPR/Cas9 delivery that enables efficient and traceable gene editing in primary human HSPCs, and is compatible with high functionality both in vitro and in vivo.
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- 2020
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71. Ensino superior a distância e o desenvolvimento de competências profissionais: Uma análise com base nas perceções dos diplomados
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Susana Henriques, Cláudia Neves, Ana Paula Silva, Pedro Abrantes, Bárbara Bäckström, Isabel Falé, Marc Jacquinet, Olga Magano, and Maria do Rosário Ramos
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graduados do ensino superior ,perfis e competências ,empregabilidade ,Sociology (General) ,HM401-1281 - Abstract
Quem são os estudantes que optam pela Educação Superior a Distância ? Quais as suas expetativas e grau de satisfação com os cursos nesta modalidade ? Qual o impacto do curso na vida profissional e pessoal do estudante da UAb ? O presente artigo centra-se nestas questões, seguindo um enquadramento teórico que mobiliza estudos sobre a procura de respostas para novos públicos e novas necessidades nas sociedades atuais. O desenho metodológico seguiu a aplicação de um questionário, desenhado no âmbito do Observatório dos Percursos Profissionais e de Vida dos Diplomados da Universidade Aberta, aos estudantes que terminaram a licenciatura em 2014 e 2015. Os resultados remetem para uma satisfação global com a realização da licenciatura online, na medida em que revelam conforto no uso da plataforma e reconhecem vantagens no regime de aprendizagem. Destaca-se a valorização do prestígio social associado ao diploma de ensino superior. Concluímos que a pesquisa sobre o fenómeno da empregabilidade no ensino superior precisa de mais desenvolvimento. Os estudantes adultos apresentam um conjunto de necessidades diferenciadas, sobretudo relacionadas com a aquisição de competências para melhorar as suas condições profissionais, de empregabilidade e o desenvolvimento das suas carreiras. Os dados deste estudo reforçam a ideia de educação ao longo da vida associada ao ensino a distância como importante forma de desenvolvimento e aquisição não só de conhecimentos, como também, de competências transversais fundamentais a todos os contextos da vida e para a mobilidade profissional.
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- 2020
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72. Cerebellar and Cerebral Amyloid Visualized by [18F]flutemetamol PET in Long-Term Hereditary V30M (p.V50M) Transthyretin Amyloidosis Survivors
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Erica Irene Uneus, Christer Wilhelmsson, David Bäckström, Intissar Anan, Jonas Wixner, Björn Pilebro, Katrine Riklund, Mattias Ögren, Margareta Ögreen, Jan Axelsson, Ole B. Suhr, and Torbjörn Sundström
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amyloidosis-hereditary ,amyloid angiopathy ,[18F]flutemetamol ,positron emission tomography ,transthyretin ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
IntroductionHereditary transthyretin (ATTRv) amyloidosis caused by the V30M (p. V50M) mutation is a fatal, neuropathic systemic amyloidosis. Liver transplantation has prolonged the survival of patients and central nervous system (CNS) complications, attributed to amyloid angiopathy caused by CNS synthesis of variant transthyretin, have emerged. The study aimed to ascertain amyloid deposition within the brain in long-term ATTRv amyloidosis survivors with neurological symptoms from the CNS.MethodsA total of 20 patients with ATTR V30M having symptoms from the CNS and a median disease duration of 16 years (8–25 years) were included in this study. The cognitive and peripheral nervous functions were determined for 18 patients cross-sectionally at the time of the investigation. Amyloid brain deposits were examined by [18F]flutemetamol PET/CT. Five patients with Alzheimer's disease (AD) served as positive controls.Result60% of the patients with ATTRv had a pathological Z-score in the cerebellum, compared to only 20% in the patients with AD. 75% of the patients with transient focal neurological episodes (TFNEs) displayed a pathological uptake only in the cerebellum. Increased cerebellar uptake was related to an early age of onset of the ATTRv disease. 55% of the patients with ATTRv had a pathological Z-score in the global cerebral region compared to 100% of the patients with AD.ConclusionAmyloid deposition within the brain after long-standing ATTRv amyloidosis is common, especially in the cerebellum. A cerebellar amyloid uptake profile seems to be related to TFNE symptoms.
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- 2022
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73. Speech Localization at Low Bitrates in Wireless Acoustics Sensor Networks
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Mariem Bouafif Mansali, Pablo Pérez Zarazaga, Tom Bäckström, and Zied Lachiri
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speech source localization ,direction of arrival estimation ,speech and audio coding ,deep neural network ,wireless acoustic sensor networks ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
The use of speech source localization (SSL) and its applications offer great possibilities for the design of speaker local positioning systems with wireless acoustic sensor networks (WASNs). Recent works have shown that data-driven front-ends can outperform traditional algorithms for SSL when trained to work in specific domains, depending on factors like reverberation and noise levels. However, such localization models consider localization directly from raw sensor observations, without consideration for transmission losses in WASNs. In contrast, when sensors reside in separate real-life devices, we need to quantize, encode and transmit sensor data, decreasing the performance of localization, especially when the transmission bitrate is low. In this work, we investigate the effect of low bitrate transmission on a Direction of Arrival (DoA) estimator. We analyze a deep neural network (DNN) based framework performance as a function of the audio encoding bitrate for compressed signals by employing recent communication codecs including PyAWNeS, Opus, EVS, and Lyra. Experimental results show that training the DNN on input encoded with the PyAWNeS codec at 16.4 kB/s can improve the accuracy significantly, and up to 50% of accuracy degradation at a low bitrate for almost all codecs can be recovered. Our results further show that for the best accuracy of the trained model when one of the two channels can be encoded with a bitrate higher than 32 kB/s, it is optimal to have the raw data for the second channel. However, for a lower bitrate, it is preferable to similarly encode the two channels. More importantly, for practical applications, a more generalized model trained with a randomly selected codec for each channel, shows a large accuracy gain when at least one of the two channels is encoded with PyAWNeS.
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- 2022
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74. A Refined View of Causal Graphs and Component Sizes: SP-Closed Graph Classes and Beyond
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Bäckström, Christer and Jonsson, Peter
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Computer Science - Artificial Intelligence ,Computer Science - Data Structures and Algorithms - Abstract
The causal graph of a planning instance is an important tool for planning both in practice and in theory. The theoretical studies of causal graphs have largely analysed the computational complexity of planning for instances where the causal graph has a certain structure, often in combination with other parameters like the domain size of the variables. Chen and Gimand#233;nez ignored even the structure and considered only the size of the weakly connected components. They proved that planning is tractable if the components are bounded by a constant and otherwise intractable. Their intractability result was, however, conditioned by an assumption from parameterised complexity theory that has no known useful relationship with the standard complexity classes. We approach the same problem from the perspective of standard complexity classes, and prove that planning is NP-hard for classes with unbounded components under an additional restriction we refer to as SP-closed. We then argue that most NP-hardness theorems for causal graphs are difficult to apply and, thus, prove a more general result; even if the component sizes grow slowly and the class is not densely populated with graphs, planning still cannot be tractable unless the polynomial hierachy collapses. Both these results still hold when restricted to the class of acyclic causal graphs. We finally give a partial characterization of the borderline between NP-hard and NP-intermediate classes, giving further insight into the problem.
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- 2014
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75. Algorithms and Limits for Compact Plan Representations
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Bäckström, Christer and Jonsson, Peter
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Computer Science - Artificial Intelligence - Abstract
Compact representations of objects is a common concept in computer science. Automated planning can be viewed as a case of this concept: a planning instance is a compact implicit representation of a graph and the problem is to find a path (a plan) in this graph. While the graphs themselves are represented compactly as planning instances, the paths are usually represented explicitly as sequences of actions. Some cases are known where the plans always have compact representations, for example, using macros. We show that these results do not extend to the general case, by proving a number of bounds for compact representations of plans under various criteria, like efficient sequential or random access of actions. In addition to this, we show that our results have consequences for what can be gained from reformulating planning into some other problem. As a contrast to this we also prove a number of positive results, demonstrating restricted cases where plans do have useful compact representations, as well as proving that macro plans have favourable access properties. Our results are finally discussed in relation to other relevant contexts.
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- 2014
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76. Confirmatory factor analysis of the Evidence-Based Practice Attitude Scale (EBPAS) in a large and representative Swedish sample: is the use of the total scale and subscale scores justified?
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Anna Helena Elisabeth Santesson, Martin Bäckström, Robert Holmberg, Sean Perrin, and Håkan Jarbin
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Attitudes ,EBP ,Evidence-based practice attitude scale (EBPAS) ,Implementation ,Validation ,Psychometric evaluation ,Medicine (General) ,R5-920 - Abstract
Abstract Background There is a call for valid and reliable instruments to evaluate implementation of evidence-based practices (EBP). The 15-item Evidence-Based Practice Attitude Scale (EBPAS) measures attitude toward EBP, incorporating four lower-order factor subscales (Appeal, Requirements, Openness, and Divergence) and a Total scale (General Attitudes). It is one of a few measures of EBP attitudes evaluated for its psychometric properties. The reliability of the Total scale has been repeatedly supported, but also the multidimensionality of the inventory. However, whether all of the items contribute to the EBPAS Total beyond their subscales has yet to be demonstrated. In addition, the Divergence subscale has been questioned because of its low correlation with the other subscales and low inter-item correlations. The EBPAS is widely used to tailor and evaluate implementation efforts, but a Swedish version has not yet been validated. This study aimed to contribute to the development and cross-validation of the EBPAS by examining the factor structure of t a Swedish-language version in a large sample of mental health professionals. Methods The EBPAS was translated into Swedish and completed by 570 mental health professionals working in child and adolescent psychiatry settings spread across Sweden. The factor structure was examined using first-order, second-order and bifactor confirmatory factor analytic (CFA) models. Results Results suggested adequate fit for all CFA models. The EBPAS Total was strongly supported in the Swedish version. Support for the hierarchical second-order model was also strong, while the bifactor model gave mixed support for the subscales. The Openness and Requirements subscales came out best, while there were problems with both the Appeal (e.g. not different from the General Attitudes factor) and the Divergence subscales (e.g. low reliability). Conclusions Overall, the psychometric properties were on par with the English version and the total score appears to be a valid measure of general attitudes towards EBP. This is the first study supporting this General Attitudes factor based on a bifactor model. Although comparatively better supported in this Swedish sample, we conclude that the use of the EBPAS subscale scores may result in misleading conclusions. Practical implications and future directions are discussed.
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- 2020
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77. Exploring mediators of the recovery process over time among mental health service users, using a mixed model regression analysis based on cluster RCT data
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Elisabeth Argentzell, Martin Bäckström, Kristine Lund, and Mona Eklund
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Recovery ,Mental illness ,Activities of daily living ,Psychiatry ,RC435-571 - Abstract
Abstract Background Personal recovery is associated with many significant health-related factors, but studies exploring associations between activity factors and personal recovery among service users are scarce. The aims of this study were hence to; 1) investigate if various aspects of activity may mediate change in recovery while also acknowledging clinical, sociodemographic and well-being factors; 2) explore the effects of two activity-based interventions, Balancing Everyday Life (BEL) or standard occupational therapy (SOT), on personal recovery among service users. Methods Two-hundred-and-twenty-six service users were included in a cluster RCT, 133 from BEL units and 93 from SOT units. Participants commonly had a diagnosis of mood disorder and the mean age was 40. Instruments used targeted activity, mastery and functioning. A mixed-model regression analysis was employed. Results The model tested was whether selected variables could be used to mediate the change in recovery from the start to a six-month follow-up after intervention. Participants’ personal recovery increased after treatment and increased further at the follow-up. The general level of recovery was negatively related to a diagnosis of depression/anxiety, both before and after treatment, but depressed/anxious service users still increased their recovery. There were no significant relations between recovery and sex or age. The interactions between change in recovery and changes in depression/anxiety, satisfaction with activities, sex, and age were all non-significant. All possible treatment mediators included were related to change in recovery, the strongest being occupational engagement and mastery, followed by activity satisfaction and symptoms. Mediation was shown by the decrease in the effect of the time factor (from intervention start to completion) when the covariates were introduced. In all cases the time variable was still significant. When testing a model with all variables simultaneously as covariates, occupational engagement and mastery were strongly significant. There was no difference between interventions regarding recovery improvement. Conclusion The treatments were equally beneficial and were effective regardless of gender, age and diagnosis. Those who gained most from the treatment also gained in feelings of mastery and activity engagement. Activity engagement also moderated the level of recovery. To enhance recovery, interventions should facilitate meaningful activities and gaining control in life. Trial registration The study was registered with ClinicalTrials.gov . Reg. No. NCT02619318 . Retrospectively registered: December 2, 2015.
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- 2020
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78. Evaluating a frontostriatal working-memory updating-training paradigm in Parkinson’s disease: the iPARK trial, a double-blinded randomized controlled trial
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Magdalena Eriksson Domellöf, Lois Walton, Carl-Johan Boraxbekk, David Bäckström, Maria Josefsson, Lars Forsgren, and Anna Stigsdotter Neely
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Working memory training ,Updating training ,Parkinson’s disease ,Randomized controlled study ,Cognitive training ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Abstract Background Cognitive decline and dementia are common in Parkinson’s disease (PD). Cognitive deficits have been linked to the depletion of dopamine in the nigrostriatal pathway, but pharmacological treatments for PD have little evidence of improving or delaying cognitive decline. Therefore, exploring non-pharmacological treatment options is important. There have been some promising results of cognitive training interventions in PD, especially for improvements in working memory and executive functions. Yet, existing studies are often underpowered, lacking appropriate control condition, long term follow-up, a thorough description of the intervention and characteristics of the participants. Working memory updating training has previously shown to increase striatal activation in healthy young and old participants as well as dopaminergic neurotransmission in healthy young participants. In the light of dopamine dysfunction in PD, with negative effects on both motor and cognitive functions it is of interest to study if an impaired striatal system can be responsive to a non-invasive, non-pharmacological intervention. Methods and design The iPARK trial is a double-blinded, randomized controlled trial with a parallel-group design that aims to recruit 80 patients with PD (during the period 02/2017–02/2023). Included patients need to have PD, Hoehn and Yahr staging I-III, be between 45 to 75 years of age and not have a diagnosis of dementia. All patients will undergo 30 sessions (6–8 weeks) of web-based cognitive training performed from home. The target intervention is a process-based training program targeting working memory updating. The placebo program is a low dose short-term memory program. A battery of neuropsychological tests and questionnaires will be performed before training, directly after training, and 16 weeks after training. Discussion We expect that the iPARK trial will provide novel and clinically useful information on whether updating training is an effective cognitive training paradigm in PD. Further, it will hopefully contribute to a better understanding of cognitive function in PD and provide answers regarding cognitive plasticity as well as determining critical factors for a responsive striatal system. Trial registration Clinicaltrials.gov registry number: NCT03680170 , registry name: “Cognitive Training in Parkinson’s Disease: the iPARK study”, retrospectively registered on the 21st of September 2018. The inclusion of the first participant was the 1st of February 2017.
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- 2020
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79. Corrigendum: Parents' Perceptions About Future Digital Parental Support—A Phenomenographic Interview Study
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Caroline Bäckström, Sandi Chamoun, Shazima Tejani, and Viveca Larsson
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digital health literacy ,professional support ,pregnancy ,childbirth ,labor ,parenting ,Medicine ,Public aspects of medicine ,RA1-1270 ,Electronic computers. Computer science ,QA75.5-76.95 - Published
- 2021
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80. Digital Tools as Parental Support—A Study Protocol Describing Prospective Development and Exploration of Two Digital Tools for Parents
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Caroline Bäckström, Henrik Engström, Rajna Knez, and Margaretha Larsson
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digitalization ,professional support ,pregnancy ,childbirth ,labor ,parenting ,Medicine ,Public aspects of medicine ,RA1-1270 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Background: The access to digital tools for parents is increasing, and further exploration is needed to gain knowledge about parents' experiences in using such tools, for example, when preparing for childbirth and parenthood. This study protocol describes a prospective study that will explore serious games as digital tools for parental support, and both parents' and healthcare professionals' views will be included. The objectives of the prospective study are to explore two different serious games: (1) Childbirth Journey (Swedish: Förlossningsresan), relating to pregnancy, childbirth and parenthood; and (2) Interplay (Swedish: Samspel), relating to parental couple relationships and parenthood.Methods: An intervention study will be conducted. The study will include four different sub-studies (A–D) with both qualitative and quantitative methods and a longitudinal design. Both parents (A, B and D) and healthcare professionals (C) will be included, and data will be collected through interviews (A–C) and repeated web-based questionnaires (D). Data will be analysed using phenomenography and qualitative content analysis (A–C), and descriptive and analytical analyses will be performed for comparisons and associations (D).Discussion: The value of monitoring and reporting on developments and trends in digital innovation for public health has been stipulated by the World Health Organization. The prospective study will contribute further knowledge about multidisciplinary development of digital tools as professional support for parents, as well as knowledge about parents' and healthcare professionals' experiences using digital tools concerning pregnancy, labour, parenthood and parental couple relationships.Trial Registration: This study was retrospectively registered (02/10/2020) within the ISRCTN with ID: ISRCTN18017741. http://www.isrctn.com/ISRCTN18017741.
- Published
- 2021
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81. Author Correction: Spatiotemporal dissection of the cell cycle with single-cell proteogenomics
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Mahdessian, Diana, Cesnik, Anthony J., Gnann, Christian, Danielsson, Frida, Stenström, Lovisa, Arif, Muhammad, Zhang, Cheng, Le, Trang, Johansson, Fredric, Schutten, Rutger, Bäckström, Anna, Axelsson, Ulrika, Thul, Peter, Cho, Nathan H., Carja, Oana, Uhlén, Mathias, Mardinoglu, Adil, Stadler, Charlotte, Lindskog, Cecilia, Ayoglu, Burcu, Leonetti, Manuel D., Pontén, Fredrik, Sullivan, Devin P., and Lundberg, Emma
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- 2022
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82. Chemistry of Acidic and Neutralized Alum Shale Pit Lakes 50 Years After Mine Closure, Kvarntorp, Sweden
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Åhlgren, Kristina, Sjöberg, Viktor, Grawunder, Anja, Allard, Bert, and Bäckström, Mattias
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- 2020
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83. A Complete Parameterized Complexity Analysis of Bounded Planning
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Baeckstroem, Christer, Jonsson, Peter, Ordyniak, Sebastian, and Szeider, Stefan
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Computer Science - Artificial Intelligence ,Computer Science - Data Structures and Algorithms - Abstract
The propositional planning problem is a notoriously difficult computational problem, which remains hard even under strong syntactical and structural restrictions. Given its difficulty it becomes natural to study planning in the context of parameterized complexity. In this paper we continue the work initiated by Downey, Fellows and Stege on the parameterized complexity of planning with respect to the parameter "length of the solution plan." We provide a complete classification of the parameterized complexity of the planning problem under two of the most prominent syntactical restrictions, i.e., the so called PUBS restrictions introduced by Baeckstroem and Nebel and restrictions on the number of preconditions and effects as introduced by Bylander. We also determine which of the considered fixed-parameter tractable problems admit a polynomial kernel and which don't., Comment: The paper is a combined and extended version of the papers "The Complexity of Planning Revisited - A Parameterized Analysis" (AAAI 2012, arXiv:1208.2566) and "Parameterized Complexity and Kernel Bounds for Hard Planning Problems" (CIAC 2013, arXiv:1211.0479)
- Published
- 2013
84. Parents' Perceptions About Future Digital Parental Support—A Phenomenographic Interview Study
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Caroline Bäckström, Sandi Chamoun, Shazima Tejani, and Viveca Larsson
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digital health literacy ,professional support ,pregnancy ,childbirth ,labor ,parenting ,Medicine ,Public aspects of medicine ,RA1-1270 ,Electronic computers. Computer science ,QA75.5-76.95 - Abstract
Background: Parents use digital sources (such as the internet or online forums and applications) during pregnancy and after childbirth to receive informative support. Research shows that there is further need for innovation development in digital parental support despite informative support available in digital form.Purpose: To explore parents' perceptions of future digital parental support concerning pregnancy and the first 18 months of parenthood.Method: A phenomenographic interview study with an inductive approach including 15 semi-structured interviews was conducted.Results: The analysis process resulted in three descriptive categories: Opportunities for virtual and in-person meetings, Individualized digital parental support, and Professional knowledge and trustworthiness concerning future digital parental support.Conclusion: The results broaden the knowledge about how future digital parental support can be designed to facilitate the functional, interactive, and critical digital health literacy of new and would-be parents. To succeed, healthcare organizations should allow healthcare professionals to assume an active role in developing digital parental support, both as health educators (i.e., providing parents with knowledge) and facilitators (i.e., facilitating parents' use of digital parental support). However, parents perceived that future digital parental support should complement standard care instead of replacing in-person meetings with healthcare professionals.
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- 2021
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85. Parameterized Complexity and Kernel Bounds for Hard Planning Problems
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Bäckström, Christer, Jonsson, Peter, Ordyniak, Sebastian, and Szeider, Stefan
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Computer Science - Data Structures and Algorithms ,Computer Science - Artificial Intelligence - Abstract
The propositional planning problem is a notoriously difficult computational problem. Downey et al. (1999) initiated the parameterized analysis of planning (with plan length as the parameter) and B\"ackstr\"om et al. (2012) picked up this line of research and provided an extensive parameterized analysis under various restrictions, leaving open only one stubborn case. We continue this work and provide a full classification. In particular, we show that the case when actions have no preconditions and at most $e$ postconditions is fixed-parameter tractable if $e\leq 2$ and W[1]-complete otherwise. We show fixed-parameter tractability by a reduction to a variant of the Steiner Tree problem; this problem has been shown fixed-parameter tractable by Guo et al. (2007). If a problem is fixed-parameter tractable, then it admits a polynomial-time self-reduction to instances whose input size is bounded by a function of the parameter, called the kernel. For some problems, this function is even polynomial which has desirable computational implications. Recent research in parameterized complexity has focused on classifying fixed-parameter tractable problems on whether they admit polynomial kernels or not. We revisit all the previously obtained restrictions of planning that are fixed-parameter tractable and show that none of them admits a polynomial kernel unless the polynomial hierarchy collapses to its third level., Comment: This is the full version of a paper that will appear in the Proc. of CIAC 2013
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- 2012
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86. The Complexity of Planning Revisited - A Parameterized Analysis
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Baeckstroem, Christer, Chen, Yue, Jonsson, Peter, Ordyniak, Sebastian, and Szeider, Stefan
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Computer Science - Artificial Intelligence - Abstract
The early classifications of the computational complexity of planning under various restrictions in STRIPS (Bylander) and SAS+ (Baeckstroem and Nebel) have influenced following research in planning in many ways. We go back and reanalyse their subclasses, but this time using the more modern tool of parameterized complexity analysis. This provides new results that together with the old results give a more detailed picture of the complexity landscape. We demonstrate separation results not possible with standard complexity theory, which contributes to explaining why certain cases of planning have seemed simpler in practice than theory has predicted. In particular, we show that certain restrictions of practical interest are tractable in the parameterized sense of the term, and that a simple heuristic is sufficient to make a well-known partial-order planner exploit this fact., Comment: (author's self-archived copy)
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- 2012
87. Prediction of psychiatric comorbidity on premature death in a cohort of patients with substance use disorders: a 42-year follow-up
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Mats Fridell, Martin Bäckström, Morten Hesse, Peter Krantz, Sean Perrin, and Anna Nyhlén
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Cohort study ,Premature death ,42-year follow-up ,Drug abuse ,Psychiatric comorbidity ,Personality disorder ,Psychiatry ,RC435-571 - Abstract
Abstract Background We need to better understand how the use of different substances and psychiatric comorbidity influence premature death generally and cause-specific death by overdose, intoxication and somatic disorders in people with substance use disorders. Method A cohort of 1405 patients consecutively admitted to a Swedish detoxification unit for substance use disorders in 1970–1995 was followed-up for 42 years. Substances were identified by toxicological analyses. Mortality figures were obtained from a national registry. Causes of death were diagnosed by forensic autopsy in 594 patients deceased by 2012. Predictions were calculated by competing risks analysis. Results Forty-two per cent of the cohort died during follow-up; more men than women (46.3% vs 30.4%). The standardised mortality ratio (SMR) was calculated as the ratio of observed deaths in males and females in specific age groups in the cohort versus expected deaths in corresponding groups in the general population. SMR was 5.68 for men (CI 95%; 5.04–6.11) and 4.98 (CI 95%; 4.08–5.88) for women. The crude mortality rate (number of deaths divided by number of person observation years) was 2.28% for men and 1.87% for women. Opiates predicted increased risk of premature death while amphetamine and cannabis predicted lower risk. Comorbid psychiatric disorders were identified in 378 cases and personality disorders in 763 cases. Primary psychoses or mood/depression and anxiety disorders predicted a higher risk of premature mortality. Death by overdose was predicted by male gender, younger age at admission to substance treatment, opiate use, and comorbid depression and anxiety syndromes. Cannabis and amphetamine use predicted a lower risk of overdose. Death by intoxication was predicted by male gender, use of sedatives/hypnotics or alcohol/mixed substances, primary psychoses and depression/anxiety syndromes. Premature death by somatic disorder was predicted by male gender and alcohol/mixed abuse. Conclusion Psychiatric comorbid disorders were important risk factors for premature drug-related death. Early identification of these factors may be life-saving in the treatment of patients with substance use disorders.
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- 2019
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88. Female risk-adjusted survival advantage after injuries caused by falls, traffic or assault: a nationwide 11-year study
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Robert Larsen, Denise Bäckström, Mats Fredrikson, Ingrid Steinvall, Rolf Gedeborg, and Folke Sjoberg
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Risk-adjusted mortality ,ICISS ,Trauma ,Injury ,Nationwide ,Epidemiological ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Abstract Background A female survival advantage after injury has been observed, and animal models of trauma have suggested either hormonal or genetic mechanisms as component causes. Our aim was to compare age and risk-adjusted sex-related mortality in hospital for the three most common mechanisms of injury in relation to hormonal effects as seen by age. Methods All hospital admissions for injury in Sweden during the period 2001–2011 were retrieved from the National Patient Registry and linked to the Cause of Death Registry. The International Classification of Diseases Injury Severity Score (ICISS) was used to adjust for injury severity, and the Charlson Comorbidity Index to adjust for comorbidity. Age categories (0–14, 15–50, and ≥ 51 years) were used to represent pre-menarche, reproductive and post- menopausal women. Results Women had overall a survival benefit (OR 0.51; 95% CI 0.50 to 0.53) after adjustment for injury severity and comorbidity. A similar pattern was seen across the age categories (0–14 years OR 0.56 (95% CI 0.25 to 1.25), 15–50 years OR 0.70 (95% CI 0.57 to 0.87), and ≥ 51 years OR 0.49 (95% CI 0.48 to 0.51)). Conclusion In this 11-year population-based study we found no support for an oestrogen-related mechanism to explain the survival advantage for females compared to males following hospitalisation for injury.
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- 2019
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89. Vad är mat och vad är annat?
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Stina Bäckström
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Cavell ,skeptisisme ,komedie ,humor ,tragedie ,anerkjennelse ,Philosophy (General) ,B1-5802 - Abstract
Sammanfattning Genom en diskussion av en sketch ur en komediföreställning kommer jag att lyfta fram humorns och komedins relation till skepticismen som tema i Stanley Cavells filosofi. I The Claim of Reason utvecklar Cavell ett samband mellan skepticism och tragedi. Kopplingen mellan komedi och skepticism förblir mer antydd, och då i termer av ett slags symmetri med tragedi. Jag menar att när vi låter humor och komedin ta plats i relation till den skeptiska problematiken så kommer en asymmetri att visa sig mellan tragedi och komedi. Detta har att göra med komedin och humorns förmåga att innefatta och erkänna den smärta som finns i det tragiska. Jag diskuterar Cavells begrepp om erkännande (acknowledgment) och hävdar att begreppet behöver modifieras när vi talar om det slags erkännande som finns i en viss typ av humor.
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- 2019
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90. Fahlström stannade i Stockholm
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Per Bäckström
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Öyvind Fahlström ,Sigtunastiftelsen ,manifest ,konkret poesi ,neoavantgarde ,femtiotal ,Literature (General) ,PN1-6790 - Abstract
SAMMENDRAG Öyvind Fahlströms berömda manifest för konkret poesi «HÄTILA RAGULPR PÅ FÅTSKLIABEN» (1954) skrevs i en reaktion på diktarkonferensen i Sigtuna den 10–12 april 1953, som blev det incitament han behövde för att skriva om ett förmodligen redan påbörjat program till ett manifest. Det svenska litterära fältet existerade helt oberoende av den transnationella avantgardeströmning han promoverar i sin estetik och konferensen utgjorde därför enbart accidens för manifestets tillkomst. En diskussion av del ett med dess förlöjligande av den bidrar därmed inte med någon kunskap om manifestets essens: dess program. Med en bättre förståelse av relationen mellan Sigtunakonferensen och Fahlströms manifest skapas en mer rättvisande bild av femtiotalet, samtidigt som man i framtida forskning kan fokusera manifestets tonvikt på processualitet och performativitet.
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- 2019
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91. Dopamine transporter imaging with [18F]FE-PE2I PET and [123I]FP-CIT SPECT—a clinical comparison
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Susanna Jakobson Mo, Jan Axelsson, Lars Jonasson, Anne Larsson, Mattias J. Ögren, Margareta Ögren, Andrea Varrone, Linda Eriksson, David Bäckström, Sara af Bjerkén, Jan Linder, and Katrine Riklund
- Subjects
Parkinson’s disease ,PET ,SPECT ,Dopamine transporter (DAT) ,[18F]FE-PE2I ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Abstract Background Dopamine transporter (DAT) imaging may be of diagnostic value in patients with clinically suspected parkinsonian disease. The purpose of this study was to compare the diagnostic performance of DAT imaging with positron emission computed tomography (PET), using the recently developed, highly DAT-selective radiopharmaceutical [18F]FE-PE2I (FE-PE2I), to the commercially available and frequently used method with [123I]FP-CIT (FP-CIT) single-photon emission computed tomography (SPECT) in early-stage idiopathic parkinsonian syndrome (PS). Methods Twenty-two patients with a clinical de novo diagnosis of PS and 28 healthy controls (HC) participating in an on-going clinical trial of FE-PE2I were analyzed in this study. Within the trial protocol, participants are clinically reassessed 2 years after inclusion. A commercially available software was used for automatic calculation of FP-CIT-specific uptake ratio (SUR). MRI-based volumes of interest combined with threshold PET segmentation were used for FE-PE2I binding potential relative to non-displaceable binding (BPND) quantification and specific uptake value ratios (SUVR). Results PET with FE-PE2I revealed significant differences between patients with a clinical de novo diagnosis of PS and healthy controls in striatal DAT availability (p
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- 2018
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92. Acute Mania and Catatonia in a Teenager Successfully Treated with Electroconvulsive Therapy and Diagnosed with Turner Syndrome and Bipolar Disorder
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Maria Ygland Rödström, Björn Axel Johansson, Beata Bäckström, Pouya Movahed, Carl-Magnus Forslund, and Olof Rask
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Psychiatry ,RC435-571 - Abstract
Background. Turner syndrome (TS) is an X-linked chromosomal abnormality with a global prevalence of 1/2000 live-born girls. The physiological symptoms of TS have been thoroughly characterized, but only a few studies have described associated psychiatric symptoms. We report a case of an adolescent girl who presented with acute mania with psychotic features and was successfully treated with electroconvulsive therapy (ECT). She was subsequently diagnosed with bipolar syndrome and TS. Case Presentation. A 17-year-old girl presented to us with manic symptoms, including disorganized speech, auditory hallucinations, and affect lability. Initially, she was treated with antipsychotics and benzodiazepines, whereby the positive affective symptoms declined. However, the psychotic symptoms progressed, and she developed a catatonic state. ECT was started 6 days after admission, with improvement after two treatments. When ECT was tapered after seven sessions, she relapsed, and the treatment was extended to twelve sessions, with successful outcome. Following discharge, she was diagnosed with TS with partial loss on one of the X-chromosomes (46X, del (X)(p21)), which might have contributed to the development of her sudden acute manic episode. Conclusions. This case demonstrates for the first time that ECT may be a safe and efficient treatment strategy for acute mania in adolescents with concomitant TS and that severely affected adolescents may require a prolonged series with gradual tapering of ECT. The present case also demonstrates a possible association between TS and bipolar syndrome and that the clinical presentation of a manic episode in a patient with this comorbidity could be more complex and the treatment response slower.
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- 2021
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93. Context rules! Top-level education policies for newly arrived migrant students across six European countries
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Amalee Meehan, Silvia de Almeida, Barbara Bäckström, Glorianne Borg-Axisa, Nathanaël Friant, Øystein Lund Johannessen, and Monica Roman
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Newly arrived migrant students (NAMS) ,Migration ,Education ,Context ,Top-level policy ,Europe ,Theory and practice of education ,LB5-3640 - Abstract
Migration across Europe is an increasing reality over the last number of decades, affecting countries with long histories of immigration as well as countries newer to the phenomenon. Although education remains a key factor in receiving and integrating migrants, policies and practices differ among countries. How contextual factors shape these differences is under-represented. This article reviews the top-level education policies on receiving Newly Arrived Migrant Students (NAMS) in six European countries – Belgium, Ireland, Malta, Norway, Portugal and Romania – in an attempt to fill this gap. Employing the European Commission four-dimensional framework of educational support for migrants, we examine how the context of each country shapes these policies. Findings are somewhat paradoxical, indicating both the contextual nature of top-level policies, and a trend towards policy homogenisation at a European level, despite very different national contexts.
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- 2021
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94. Combined lentiviral- and RNA-mediated CRISPR/Cas9 delivery for efficient and traceable gene editing in human hematopoietic stem and progenitor cells
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Yudovich, David, Bäckström, Alexandra, Schmiderer, Ludwig, Žemaitis, Kristijonas, Subramaniam, Agatheeswaran, and Larsson, Jonas
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- 2020
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95. Midwives' Experiences of Providing the 'Inspirational Lecture' as a Care Intervention for Expectant Parents—A Qualitative Study
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Caroline Bäckström, Tina Söderlund, Stina Thorstensson, Lena B. Mårtensson, and Marie Golsäter
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transition ,pregnancy ,childbirth experience ,parenthood ,content analysis ,antenatal ,Public aspects of medicine ,RA1-1270 - Abstract
Background: In most Western countries, ordinary parental classes exist and have become a well-established form of professional support within midwifery care, even though some of these classes lack evidence of benefits for the parents. A Swedish randomized controlled trial including an intervention as a pilot study, revealed that a type of parental preparatory professional support provided for expectant parents, the “inspirational lecture,” showed a tendency to be beneficial for parents' birth experience, and their perceived quality of parental couple relationship. However, there is no previous research on the midwives' experiences from providing the inspirational lecture. Carrying out research on midwives' experiences from providing the lecture, could bring future opportunities to provide a work-integrated learning (WIL) related to professionals' skills, and the pedagogic used.Aim: To elucidate midwives' experiences about providing the inspirational lecture as a care intervention for expectant parents.Methods: Midwives were interviewed and data were analyzed using qualitative content analysis.Results: The midwives strived to put childbirth into a comprehensive and manageable context for the expectant parents, during the inspirational lecture. For this, different approaches were used to make expectant parents understand how the parents themselves can be engaged participants in their own birth.Conclusion and Clinical Implications: The midwives used the inspirational lecture to provide the expectant parents with knowledge about how they, as a parental couple, could cooperate and feel safe in relation to the upcoming birth. This could be understood as if the midwives were striving to facilitate the integrative power of the parental couple, which is the couples' ability to gather their joint power. These results can assist midwives and serve as a reference for providing parental classes for expectant parents with a focus on promoting both the parents' individual as well as mutual skills.
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- 2020
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96. The Properties and Utility of Less Evaluative Personality Scales: Reduction of Social Desirability; Increase of Construct and Discriminant Validity
- Author
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Martin Bäckström and Fredrik Björklund
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big five ,personality measurement ,personality structure ,self-ratings ,social desirability ,Psychology ,BF1-990 - Abstract
Evaluative neutralization implies rephrasing items such that it is less clear to the respondent what would be a desirable response in the given population. The current research compares evaluatively neutralized scales measuring the FFM model with standard counterparts. Study 1 reveals that evaluatively neutralized scales are less influenced by social desirability. Study 2 estimates higher-order factor models for neutralized vs. standard five-factor scales. In contrast to standard inventories, there was little support for higher-order factors for neutralized scales. Study 3 demonstrates the convergent and discriminant validity for the neutralized scales, e.g., by less inflated correlations to external measures. It is argued that evaluatively neutralized inventories help researchers come to grips with social desirability in personality measurement, and are particularly useful when the factor structure is central to the research question and there is a focus on discriminant validity.
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- 2020
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97. Time stamped list mode data from gamma-ray spectroscopic measurements on 47 nuclear fuel assemblies performed at Clab, Sweden, September 2016 through March 2019
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Peter Jansson, Martin Bengtsson, Ulrika Bäckström, Sophie Grape, Erik Branger, and Anders Sjöland
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Spent nuclear fuel ,Gamma ,Axial scanning ,List mode ,Spectroscopy ,HPGE ,Computer applications to medicine. Medical informatics ,R858-859.7 ,Science (General) ,Q1-390 - Abstract
Using a high-purity Germanium gamma-ray energy spectroscopic detector system, time-stamped list-mode data sets were acquired during axial scanning of 19 boiling water reactor (BWR) and 28 pressurized water reactor (PWR) type of nuclear fuel assemblies.The data sets were collected during two measurements campaigns in September 2016 and March 2019 at the Central Interim Storage Facility for Spent Nuclear (Clab) in Sweden. A certified calibration source of 137Cs was positioned along the central line of sight between the measured fuel assembly and the detector. Data sets from measurements with only the calibration source and other background sources, i.e. without a nuclear fuel assembly present, are also included.The list-mode structure of the measured data allows for an axially-resolved as well as energy-spectral resolved intensity of nuclide-specific gamma lines emitted from the spent nuclear fuel. Data presented here can be used e.g. for validation of gamma-ray transport simulation tools or for development of methods to estimate parameters of the spent nuclear fuel based on data from gamma-ray spectroscopy.
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- 2020
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98. Effects of the 'Inspirational Lecture' in Combination With 'Ordinary Antenatal Parental Classes' as Professional Support for Expectant Parents: A Pilot Study as a Randomized Controlled Trial
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Stina Thorstensson, Anette Ekström-Bergström, and Caroline Bäckström
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transition ,pregnancy ,childbirth experience ,parenthood ,sense of coherence ,couple relationship ,Public aspects of medicine ,RA1-1270 - Abstract
Background: Both expectant mothers and their partners describe weaknesses in ordinary parental preparatory professional support provided internationally and nationally within Sweden. Therefore, it is necessary to develop the parental preparatory professional support provided by midwives for expectant parents within Sweden. This study will evaluate the effects on expectant parents of receiving a combination of an “inspirational lecture” and “ordinary antenatal parental classes” compared with only “ordinary antenatal parental classes.”Methods/Design: This block randomized controlled trial included an intervention as a pilot study, in which expectant parents were randomized for (1) the inspirational lecture and ordinary antenatal parental classes (intervention group [IG]) (n = 66) or (2) ordinary antenatal parental classes (control group [CG]) (n = 60). Data collection with repeated questionnaires was conducted in the first week and 6 months after birth. Statistical analyses were conducted for participant characteristics, differences between parents within IG and CG, effects of the intervention, intention to treat, and internal consistency of the included measurements.Results: The intervention showed a tendency to be gainful for one out of four outcomes related to birth experience, and parents' perceived quality of parental couple relationship consensus and sexuality and manageability. These results were more prominent for the partners. Parents within both the intervention and control groups reported decreased social support in the first 6 months after birth.Conclusion and Clinical Implications: Overall, the concept of the inspirational lecture in combination with ordinary antenatal parental classes as parental preparatory professional support seems to be a valuable care intervention. However, this study was a pilot study and the results should therefore be interpreted with caution. More research is needed since childbirth and transition to parenthood are complex processes in need of comprehension.
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- 2020
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99. GABA-A receptor modulating steroids in acute and chronic stress; relevance for cognition and dementia?
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S.K.S. Bengtsson, T. Bäckström, R. Brinton, R.W. Irwin, M. Johansson, J. Sjöstedt, and M.D. Wang
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Allopregnanolone ,GABA-A receptor modulating steroids ,GABA-A receptor modulating steroid antagonists ,Learning ,Memory ,Dementia ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 ,Neurology. Diseases of the nervous system ,RC346-429 ,Neurophysiology and neuropsychology ,QP351-495 - Abstract
Cognitive dysfunction, dementia and Alzheimer's disease (AD) are increasing as the population worldwide ages. Therapeutics for these conditions is an unmet need. This review focuses on the role of the positive GABA-A receptor modulating steroid allopregnanolone (APα), it's role in underlying mechanisms for impaired cognition and of AD, and to determine options for therapy of AD. On one hand, APα given intermittently promotes neurogenesis, decreases AD-related pathology and improves cognition. On the other, continuous exposure of APα impairs cognition and deteriorates AD pathology. The disparity between these two outcomes led our groups to analyze the mechanisms underlying the difference. We conclude that the effects of APα depend on administration pattern and that chronic slightly increased APα exposure is harmful to cognitive function and worsens AD pathology whereas single administrations with longer intervals improve cognition and decrease AD pathology. These collaborative assessments provide insights for the therapeutic development of APα and APα antagonists for AD and provide a model for cross laboratory collaborations aimed at generating translatable data for human clinical trials.
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- 2020
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100. Being a family member of a burn survivor – Experiences and needs
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Josefin Bäckström, Mimmie Willebrand, Folke Sjöberg, and Kristina Haglund
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Dermatology ,RL1-803 ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Background: Family members are important in the recovery process of persons with severe burns; however, few previous studies have focused on how this group experiences care and rehabilitation. Objective: To explore family members’ experiences and needs, during the time in hospital and after discharge. Methodology: Explorative study with a qualitative descriptive design. Ten semi-structured interviews with family members of injured persons treated at the national burn centres were recorded digitally, transcribed verbatim, and analysed using content analysis. Findings: Five categories were related to experiences during care: Experiencing excellent treatment and support, Experiencing mistrust and a rejecting attitude, Feelings of chaos and shock, Being the hub of the family network, Feeling hope and thankfulness. Three categories were related to experiences during rehabilitation: Ambiguous feelings, Multifaceted support and Handling the situation. Conclusion: The experiences of the time in hospital and during rehabilitation are individual and comprise a mixture of positive and negative experiences and a diversity of needs. The results suggest that healthcare professionals should be proactive and identify specific needs for support as well as provide individualized treatment of family members. Keywords: Burns, Critical care, Family centred care, Family members, Needs, Experiences
- Published
- 2018
- Full Text
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