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1.
  • Boström, Inger, et al. (författare)
  • Does the changing sex ratio of multiple sclerosis give opportunities for intervention?
  • 2015
  • Ingår i: Acta Neurologica Scandinavica. - : Wiley. - 0001-6314 .- 1600-0404 .- 0065-1427 .- 1600-5449. ; 132, s. 42-45
  • Forskningsöversikt (refereegranskat)abstract
    • In several international studies, an increasing women-to-men (w/m) ratio in patients with multiple sclerosis (MS) has been reported. Such sex ratios have been analysed by year of onset or by year of birth. In a Swedish study, data from the Swedish MS register (SMSreg) were used to analyse the w/m ratio in Sweden. The sex ratio was analysed both by year of birth (8834 patients) and by year of onset (9098 patients). No increased w/m ratio was seen in this study. The age-specific sex ratio did not demonstrate any significant changes. However, a new investigation of the sex ratio in Sweden, based on data from all available data sources (19,510 patients), showed a significantly increased w/m ratio of MS in Sweden from 1.70 to 2.67. Environmental factors such as cigarette smoking, hormonal factors and nutrition are of interest in this context, but the cause of the increasing w/m ratio in MS is yet not possible to explain.
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  • Almkvist, Ove, et al. (författare)
  • Subjective working and declarative memory in dementia and normal aging
  • 2019
  • Ingår i: Acta Neurologica Scandinavica. - : Hindawi Limited. - 0001-6314 .- 1600-0404. ; 140:2, s. 140-146
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: Subjective memory complaints are common in both elderly individuals and patients with dementia. This study investigated the power of subjective memory, divided into declarative and working memory, to differentiate between patients with dementia and normal elderly individuals.Method: Two groups of participants, patients with dementia (n = 117) and normal elderly individuals (n = 117), individually matched with regard to age, gender, and education. All subjects had participated in the third wave of the HUNT population health survey in Nord-Trondelag County in Norway and completed the Meta-Memory Questionnaire (MMQ) in the HUNT study. The MMQ was subdivided into two components, one associated with declarative memory (episodic and semantic) and the other with working memory.Results: Patients with dementia reported significantly more subjective memory concerns than normal elderly individuals. The difference between working and declarative memory components was significantly greater in patients with dementia than in normal elderly individuals. This finding made it possible to differentiate patients with dementia from the normal elderly individuals. Mental and somatic health conditions did not significantly add power to differentiating the two groups.Conclusion: In clinical and research applications, subjective memory components could contribute to differentiation of patients with dementia and normal elderly individuals by using self-reported impairment in working memory, rather than declarative memory.
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4.
  • Andersen, Oluf, 1941, et al. (författare)
  • Diffusion tensor imaging in multiple sclerosis at different final outcomes
  • 2018
  • Ingår i: Acta Neurologica Scandinavica. - : Hindawi Limited. - 1600-0404 .- 0001-6314. ; 137:2, s. 165-173
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES:Methods to evaluate the relative contributions of demyelination vs axonal degeneration over the long-term course of MS are urgently needed. We used magnetic resonance diffusion tensor imaging (DTI) to estimate degrees of demyelination and axonal degeneration in the corpus callosum (CC) in cases of MS with different final outcomes.MATERIALS AND METHODS:We determined DTI measures mean diffusivity (MD), fractional anisotropy (FA), and axial (AD) and radial (RD) diffusivities in the CC of 31 MS patients, of whom 13 presented a secondary progressive course, 11 a non-progressive course, and seven a monophasic course. The study participants were survivors from an incidence cohort of 254 attack-onset MS patients with 50 years of longitudinal follow-up. As reference, we included five healthy individuals without significant morbidity.RESULTS:In patients with secondary progression, compared to all other groups, the corpus callosum showed increased RD and reduced FA, but no change in AD. None of the parameters exhibited differences among non-progressive and monophasic course groups and controls.CONCLUSION:Increased RD was observed in secondary progressive MS, indicating significant myelin loss. Normal RD values observed in the clinically isolated syndrome and non-progressive groups confirm their benign nature. AD was not a characterizing parameter for long-term outcome. Demyelination revealed by increased RD is a distinguishing trait for secondary progression.
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5.
  • Andersson Hagiwara, Magnus, et al. (författare)
  • A shorter system delay for haemorrhagic stroke than ischaemic stroke among patients who use emergency medical service
  • 2018
  • Ingår i: Acta Neurologica Scandinavica. - : Hindawi Limited. - 0001-6314 .- 1600-0404. ; 137:5, s. 523-530
  • Tidskriftsartikel (refereegranskat)abstract
    • ObjectivesWe compare various aspects in the early chain of care among patients with haemorrhagic stroke and ischaemic stroke. Materials & methodsThe Emergency Medical Services (EMS) and nine emergency hospitals, each with a stroke unit, were included. All patients hospitalised with a first and a final diagnosis of stroke between 15 December 2010 and 15 April 2011 were included. The primary endpoint was the system delay (from call to the EMS until diagnosis). Secondary endpoints were: (i) use of the EMS, (ii) delay from symptom onset until call to the EMS; (iii) priority at the dispatch centre; (iv) priority by the EMS; and (v) suspicion of stroke by the EMS nurse and physician on admission to hospital. ResultsOf 1336 patients, 172 (13%) had a haemorrhagic stroke. The delay from call to the EMS until diagnosis was significantly shorter in haemorrhagic stroke. The patient's decision time was significantly shorter in haemorrhagic stroke. The priority level at the dispatch centre did not differ between the two groups, whereas the EMS nurse gave a significantly higher priority to patients with haemorrhage. There was no significant difference between groups with regard to the suspicion of stroke either by the EMS nurse or by the physician on admission to hospital. ConclusionsPatients with a haemorrhagic stroke differed from other stroke patients with a more frequent and rapid activation of EMS.
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6.
  • Apostolaki-Hansson, Trine, et al. (författare)
  • Prognosis for intracerebral hemorrhage during ongoing oral anticoagulant treatment
  • 2019
  • Ingår i: Acta Neurologica Scandinavica. - : Hindawi Limited. - 0001-6314 .- 1600-0404. ; 139:5, s. 415-421
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Intracerebral hemorrhage (ICH) is the most serious adverse effect of treatment with oral anticoagulants. Prognostic data after ICH associated with non-vitamin K antagonist oral anticoagulants (NOAC) compared to vitamin K antagonists (VKA) are sparse. We compared 90-day survival and functional outcome following NOAC-ICH versus VKA-ICH using data from the Swedish Stroke Register (Riksstroke). Methods: Using data from Riksstroke and the Swedish Causes of Death Register between 2012 and 2016, we compared all-cause 90-day mortality for patients with NOAC-ICH versus VKA-ICH using Kaplan-Meier survival analysis and Log-rank test. Cox regression, with adjustment for age, sex, previous stroke, and level of consciousness (LOC) on admission, was used to estimate hazard ratios (HR) for 90-day mortality. Estimated functional outcome at 90 days, based on the modified Rankin Scale (mRS), was compared between VKA- and NOAC-associated ICH using chi-squared test. Results: We included 2483 patients; 300 with NOAC-ICH and 2183 with VKA-ICH. In both groups, mean age was 79 years, and 58% were male. No significant difference between NOAC-ICH and VKA-ICH was found for all-cause 90-day mortality (44.3% NOAC-ICH versus 42.6% VKA-ICH; P = 0.54, HR = 0.93; 95% confidence interval (CI): 0.78-1.12) or 90-day estimated functional outcome (mRS 0-2:13.7% and 15.3%; mRS 3-5:27.3% and 28.9%, respectively (P = 0.52)). Factors predicting death were increased age (HR = 1.03; 95%CI: 1.02-1.04) and reduced LOC (drowsy: HR = 3.48; 95%CI: 2.86-4.23; comatose: HR = 12.27; 95%CI: 10.13-14.87). Conclusion: In this large study on anticoagulant-associated ICH, we found no significant difference in mortality and functional outcome at 90 days between NOAC-ICH versus VKA-ICH.
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7.
  • Axelsson, Markus, 1975, et al. (författare)
  • Cerebrospinal fluid NCAM levels are modulated by disease-modifying therapies
  • 2019
  • Ingår i: Acta Neurologica Scandinavica. - : Hindawi Limited. - 0001-6314 .- 1600-0404. ; 139:5, s. 411-427
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Little is known about what leads to recovery between relapses in multiple sclerosis (MS), particularly following treatment. In the past, it has been demonstrated that soluble neural cell adhesion molecule (sNCAM), a putative biomarker of neuroplasticity, increased following steroid treatment in the Cerebrospinal fluid (CSF) of MS subjects undergoing acute relapses. Taking this a step further, we have evaluated the effect of disease-modifying treatment (DMTs) on CSF sNCAM levels in various subtypes of MS. Methods: We measured CSF sNCAM levels at baseline and after 12-24 months of DMT in 69 patients, 49 relapsing-remitting MS (RRMS), 20 progressive MS(PMS), and 24 healthy controls (HC) using an in-house ELISA. Of this, 31 patients had received natalizumab, 17 mitoxantrone, and 21 fingolimod. Changes in disability were measured using EDSS and disease severity by MSSS. In conjunction, CSF NfL levels were also measured. Results: At baseline, the mean sNCAM level was 268.7 ng/mL (SD: 109 ng/mL) in MS patients compared with 340.6 ng/ml (SD: 139 ng/mL) in HC, and PMS had significantly lower sNCAM (239.2 ng/mL, SD: 123.0, P = 0.019) compared to RRMS (269.4, SD: 127.4, P = 0.043). After natalizumab and mitoxantrone treatments, we observed an increase in mean sNCAM. However, in the fingolimod-treated group, mean sNCAM decreased. There was no correlation found with EDSS or MSSS, or NfL levels as a whole. Conclusions: Cerebrospinal fluid sNCAM levels were found to be lower in MS than in HC and the lowest sNCAM levels were found in PMS. Following natalizumab and mitoxantrone treatments, we observed an elevation in sNCAM levels, an effect that was not observed following fingolimod treatment. These changes, however, did not appear to correlate with disability in the short-term or NfL levels. © 2019 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd
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8.
  • Axelsson, Markus, 1975, et al. (författare)
  • Neurofilament light protein levels in cerebrospinal fluid predict long-term disability of Guillain-Barré syndrome: A pilot study.
  • 2018
  • Ingår i: Acta neurologica Scandinavica. - : Hindawi Limited. - 1600-0404 .- 0001-6314. ; 138:2, s. 143-150
  • Tidskriftsartikel (refereegranskat)abstract
    • Although the recovery from Guillain-Barré syndrome (GBS) is good in most patients, some develop permanent severe disability or even die. Early predictors would increase the likelihood to identify patients at risk for poor outcome at the acute stage, allowing them intensified therapeutic intervention.Eighteen patients with a history of GBS 9-17 years ago were reassessed with scoring of neurological disability and quality of life assessment (QoL). Their previous diagnostic work-up included clinical examination with scoring of disability, neurophysiological investigation, a battery of serology tests for infections, and cerebrospinal fluid (CSF) examination. Aliquots of CSF were frozen, stored for 20-28 years, and analyzed by ELISA for determination of neurofilament light protein (NFL) and glial fibrillary acidic protein (GFAP).Patients with poor outcome (n = 3) had significantly higher NFL and GFAP levels at GBS nadir than those with good outcome (n = 15, P < .01 and P < .05, respectively). High NFL correlated with more prominent disability and worse QoL at long-term follow-up (r = .694, P < .001, and SF 36 dimension physical component summary (PCS) (r =-.65, P < .05), respectively, whereas GFAP did not correlate with clinical outcome or QoL.High NFL in CSF at the acute stage of GBS seems to predict long-term outcome and might, together with neurophysiological and clinical measures, be useful in treatment decisions and clinical care of GBS.
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9.
  • Bartek, J, et al. (författare)
  • Surgery for chronic subdural hematoma in nonagenarians: A Scandinavian population-based multicenter study.
  • 2017
  • Ingår i: Acta neurologica Scandinavica. - : Hindawi Limited. - 1600-0404 .- 0001-6314. ; 136:5, s. 516-520
  • Tidskriftsartikel (refereegranskat)abstract
    • Chronic subdural hematoma (cSDH) is a prevalent condition often seen in the elderly, with surgery being the treatment of choice when symptomatic. So far, few have explored the surgical outcomes in patients 90 years or older. The aim of this study was to investigate outcome after cSDH surgery in nonagenarians (≥90 y/o group) compared to younger adult patients (<90 y/o group).In a Scandinavian population-based cohort we conducted a retrospective review of 1,254 patients undergoing primary burr-hole procedures for cSDH between January 1, 2005 and December 31, 2010 at three neurosurgical centers. In a comparative analysis, the primary end-point was difference in hematoma recurrence rates between the ≥90 y/o and <90 y/o groups. The secondary end-points were differences in perioperative morbidity and mortality between groups.75 patients were 90 years or older. There was no significant difference in recurrences resulting in reoperation between the age groups (10.7% vs 13.6%, P=.47). There was also no significant difference in overall complication rate (4.1% vs 8.1%, P=.21) or severe complications (1.4% vs 2.0%, P=.68). There were three (4.0%) perioperative deaths within 30 days in the ≥90 y/o group and 40 (3.4%) in the <90 y/o group (P=.78).Patients 90 years or older had similar rates of recurrence, perioperative morbidity and perioperative mortality as compared to younger patients. Age alone should not be a contraindication for surgery in patients with cSDH.
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10.
  • Bergman, Eva-Mathilda, et al. (författare)
  • National registry-based case-control study : comorbidity and stroke in young adults
  • 2015
  • Ingår i: Acta Neurologica Scandinavica. - : Hindawi Limited. - 0001-6314 .- 1600-0404. ; 131:6, s. 394-399
  • Tidskriftsartikel (refereegranskat)abstract
    • ObjectivesStroke is overrepresented in cohorts of young adults with chronic diseases. The prevalence and impact of comorbidity among young stroke patients have not been compared with individuals without stroke. Our aim was to investigate the association between comorbidity and stroke in young adults. Materials and methodsA nationwide cohort of patients (aged 15-44years), registered in the Swedish Stroke Register, (Riksstroke) 2001-2009, was identified. Age- and sex-matched controls were randomly selected from the Population Register of Sweden. Discharge diagnoses were retrieved from the National Patient Register and grouped by chapter in the International Classification of Diseases 10th revision. Associations between ICD-10 chapters and stroke were stratified (age, sex, and stroke type) and analyzed by multivariable logistic regression. ResultsIn 2599 stroke patients analyzed, the prevalence of vascular risk factors (hypertension 25.3%, dyslipidemia 13.0%, diabetes 9.7%, heart failure 3.2%, and atrial fibrillation 2.8%), all ICD-10 chapters (except pregnancy) and prestroke hospitalizations were more frequent among cases than controls. Independent associations were found between stroke and eight ICD-10 chapters: neoplasms (odds ratios (OR) 1.53, 95% CI 1.15-2.05), blood (OR 1.61, 1.11-2.34), endocrine (OR 2.28, 1.77-2.93), psychiatric (OR 1.50, 1.24-1.81), nervous (OR 1.91, 1.46-2.50), eye (OR 1.67, 1.05-2.64), circulatory (OR 3.05, 2.45-3.80), and symptoms (OR 1.31, 1.13-1.52). The risk of stroke increased by 26% per ICD-10 chapter diagnosed. ConclusionsIn addition to vascular risk factors, comorbidity (represented by ICD-10 chapters) was associated with increased risk of stroke in young individuals. The risk of stroke was further increased with the number of diagnosed ICD-10 chapters.
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