| 1. |
- Akerstrom, Finn, et al.
(författare)
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Association between catheter ablation of atrial fibrillation and mortality or stroke
- 2024
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Ingår i: Heart. - : BMJ PUBLISHING GROUP. - 1355-6037 .- 1468-201X. ; 110, s. 163-169
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Tidskriftsartikel (refereegranskat)abstract
- Objective Catheter ablation of atrial fibrillation effectively reduces symptomatic burden. However, its long-term effect on mortality and stroke is unclear. We investigated if patients with atrial fibrillation who undergo catheter ablation have lower risk for all-cause mortality or stroke than patients who are managed medically. Methods We retrospectively included 5628 consecutive patients who underwent first-time catheter ablation for atrial fibrillation between 2008 and 2018 at three major Swedish electrophysiology units. Control individuals with an atrial fibrillation diagnosis but without previous stroke were selected from the Swedish National Patient Register, resulting in a control group of 48 676 patients. Propensity score matching was performed to produce two cohorts of equal size (n=3955) with similar baseline characteristics. The primary endpoint was a composite of all-cause mortality or stroke. Results Patients who underwent catheter ablation were healthier (mean CHA(2)DS(2)-VASc score 1.4 +/- 1.4 vs 1.6 +/- 1.5, p<0.001), had a higher median income (288 vs 212 1000 Swedish krona [KSEK]/year, p<0.001) and had more frequently received university education (45.1% vs 28.9%, p<0.001). Mean follow-up was 4.5 +/- 2.8 years. After propensity score matching, catheter ablation was associated with lower risk for the combined primary endpoint (HR 0.58, 95% CI 0.48 to 0.69). The result was mainly driven by a decrease in all-cause mortality (HR 0.51, 95% CI 0.41 to 0.63), with stroke reduction showing a trend in favour of catheter ablation (HR 0.75, 95% CI 0.53 to 1.07). Conclusions Catheter ablation of atrial fibrillation was associated with a reduction in the primary endpoint of all-cause mortality or stroke. This result was driven by a marked reduction in all-cause mortality.
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| 2. |
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| 3. |
- Andéhn, Mikael, et al.
(författare)
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Facets of country image and brand equity : Revisiting the role of product categories in country-of-origin effect research
- 2016
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Ingår i: Journal of Consumer Behaviour. - : Wiley. - 1472-0817 .- 1479-1838. ; 15:3, s. 225-238
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Tidskriftsartikel (refereegranskat)abstract
- The country-of-origin effect is a topic central to the field of international marketing. Country of origin has been found to exert a particularly potent effect on consumer evaluation in situations where there is a strong link between a country and a particular product category. The present study provides further insight into how this particular effect can be understood. Drawing on a novel conceptualization of how country image and product categories interact, this study tested the relative evaluative relevance of product category with respect to estimates of brand equity across a variety of product categories. The findings suggest that facets of a country's image that are more closely related to the evaluation situation exert a greater influence on the evaluation of brands. This result encourages scholars as well as practitioners to re-evaluate which situations might cause the country of origin effect to hold managerial relevance and paves the way for new paths toward a more comprehensive understanding of the effect.
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| 4. |
- Andéhn, Mikael, 1982-
(författare)
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Place-of-Origin Effects on Brand Equity : Explicating the evaluative pertinence of product categories and association strength
- 2013
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The country-of-origin effect - the alteration of judgment derived from an association to a place, is a much studied phenomenon with great potential implications for brand management and international marketing. However, in light of criticism towards the lack of conceptual development the extant literature, the relevance of the effect has been brought into question.Through an exploration of the psychology of the association between brands and places, the country-of-origin effect is reimagined focusing on the role of association strength as well as how the interplay between place and product categories can shape consumer attitudes.The results of a series of psychometric tests suggest that association strength and the interplay between place and product category constitute antecedent conditions that are crucial for determining if a country-of-origin effect will occur. These findings, and their implications for future research as well as for practice, suggest that a reevaluation of the country-of-origin effect with a widening of the scope to encompass the commercial relevance of place writ large is warranted.
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| 5. |
- Andersson, Linus, 1979-, et al.
(författare)
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Attention bias and sensitization in chemical sensitivity.
- 2009
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Ingår i: Journal of psychosomatic research. - : Elsevier BV. - 1879-1360 .- 0022-3999. ; 66:5, s. 407-16:66, s. 407-416
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: We investigated whether persons with self-reported chemical sensitivity (CS) have an attention bias and enhanced sensitization to chemical exposure. METHODS: Chemosomatosensory, olfactory, and auditory event-related potentials (ERPs) were recorded from 21 CS subjects and 17 controls in attend and ignore conditions. Reaction times (RTs) and magnitude estimations of perceived intensity were collected in the attend condition. ERPs were averaged over attention conditions and during the first/second part of the testing. RESULTS: ERP patterns indicated that CS subjects did not habituate to the same extent as the controls and had difficulties ignoring the chemical exposure. CS subjects had faster overall RT, and the perceived intensities for the chemosomatosensory stimuli did not decrease with time in the CS group, which was the case for the controls. CONCLUSIONS: These results indicating attention bias and enhanced sensitization in CS suggest alterations in central, cognitive responses to chemical exposure.
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| 6. |
- Andersson, Linus, 1979-, et al.
(författare)
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On the relation between capsaicin sensitivity and responsiveness to CO2: detection sensitivity and event-related brain potentials.
- 2009
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Ingår i: International archives of occupational and environmental health. - : Springer Science and Business Media LLC. - 1432-1246 .- 0340-0131. ; 82:3, s. 285-90
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: Sensory hyperreactivity (SHR) with predominantly airway symptoms is a subgroup of chemical intolerance to various environmental substances with pungent/odorous properties. The hallmark of SHR is sensitivity to capsaicin inhalation, resulting in extensive coughing likely to be mediated by a C-fiber hyperreactivity of the airway sensory neurons. However, it is not clear whether capsaicin sensitivity implies a greater sensitivity to chemosomatosensory substances in general. Therefore, the present study tested the hypothesis of an association between capsaicin cough sensitivity and sensitivity to CO(2) with respect to detection sensitivity and electrophysiological brain response. METHODS: A correlational study was employed to investigate the relation between capsaicin cough sensitivity and detection thresholds and chemosomatosensory event-related potentials (ERPs) for CO(2) presented in the nasal cavity in 35 persons varying in capsaicin cough sensitivity. RESULTS: Number of coughs were found to correlate negatively with CO(2) threshold and tended to correlate negatively also with N1 and P2 latencies of the chemosomatosensory ERP for CO(2). No tendencies of correlations were found between number of coughs and latencies for olfactory and auditory ERPs, recorded for comparison, but, unexpectedly, were found between number of coughs and auditory N1 amplitude. CONCLUSIONS: The results imply that capsaicin cough sensitivity, such as in SHR, is related to higher detection sensitivity, and tends to be related to faster cortical processing of other chemosomatosensory substances, at least of CO(2).
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| 7. |
- Andersson, Linus, 1979-, et al.
(författare)
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Prevalence and risk factors for chemical sensitivity and sensory hyperreactivity in teenagers
- 2008
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Ingår i: International journal of hygiene and environmental health. - : Elsevier. - 1438-4639 .- 1618-131X. ; 211:5-6, s. 690-697
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Tidskriftsartikel (refereegranskat)abstract
- The prevalence of chemical sensitivity (CS) and sensory hyperreactivity (SHR) was assessed in a teenage population. Among a random sample of 401 teenagers, 326 (81.3%) answered questionnaires assessing sensitivity to chemicals and noise, anxiety and depression. A subgroup of 85 teenagers conducted a capsaicin inhalation test. The estimated prevalence was 15.6% for general self-reported CS, 3.7% for CS with affective and behavioral consequences, about 1% for SHR. Sensitivity variables were positively intercorrelated. Risk factors for general CS were noise sensitivity (OR: 2.1), probable anxiety (OR: 2.5) and female sex (OR: 2.0). CS problems seem to be present also in teenagers, although less so than in adults. Furthermore, CS seems to be related to other environmental sensitivities.
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| 8. |
- Andersson, Maria J E, et al.
(författare)
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The idiopathic environmental intolerance symptom inventory: development, evaluation, and application.
- 2009
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Ingår i: Journal of occupational and environmental medicine / American College of Occupational and Environmental Medicine. - : American College of Occupational and Environmental Medicine. - 1536-5948 .- 1076-2752. ; 51:7, s. 838-47
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To develop, evaluate, and apply a questionnaire-based instrument for investigation of specific symptoms in idiopathic environmental intolerance (IEI), called the Idiopathic Environmental Intolerance Symptom Inventory (IEISI). METHODS: Participants with IEI to chemicals responded to 82 candidate symptoms and to three subscales of the Quick Environmental Exposure and Sensitivity Inventory (QEESI) at a test (n = 207) and retest (n = 193) occasion. RESULTS: The 27 most commonly reported symptoms were selected and grouped into five symptom categories. Internal consistency, test-retest reliability, and concurrent validity were found to be satisfying. Cluster analysis identified two subgroups of IEI to chemicals. CONCLUSIONS: The results provide support for the IEISI being a reliable, valid, and fast tool for the study of specific symptom prevalence in IEI and encourage further study of subgroups.
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| 9. |
- Arvedson, Mats, et al.
(författare)
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Packet or Circuit Switched Voice Radio Bearers-A Capacity Evaluation for GERAN
- 2002
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Konferensbidrag (refereegranskat)abstract
- GERAN, including the EDGE radio interface, con-stitutes the 3G evolution of GSM. The use of packet switched voice radio bearers has been discussed in the GERAN standardization, but has as yet not been adopted. This paper presents a thorough capacity comparison of circuit and packet switched voice bearers, applied to GERAN. Thus the standardization decision is verified, but also a framework for future similar investigations is provided. Several parameters affect the relative performance of circuit and packet switching. This report evaluates the effect of four of these parameters, expected to have major impact on the relative performance: reuse factor, resource pool size, voice activity, and additional overhead in the packet switched case. Varying the above parameters, it is seen that in certain blocking-limited scenarios packet switching may increase capacity significantly. The highest overall capacity is however achieved in inter-ference-limited scenarios, for which packet switching provides no capacity gain.
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