| 1. |
- Menkveld, Albert J., et al.
(författare)
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Nonstandard Errors
- 2024
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Ingår i: JOURNAL OF FINANCE. - : Wiley-Blackwell. - 0022-1082 .- 1540-6261. ; 79:3, s. 2339-2390
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Tidskriftsartikel (refereegranskat)abstract
- In statistics, samples are drawn from a population in a data-generating process (DGP). Standard errors measure the uncertainty in estimates of population parameters. In science, evidence is generated to test hypotheses in an evidence-generating process (EGP). We claim that EGP variation across researchers adds uncertainty-nonstandard errors (NSEs). We study NSEs by letting 164 teams test the same hypotheses on the same data. NSEs turn out to be sizable, but smaller for more reproducible or higher rated research. Adding peer-review stages reduces NSEs. We further find that this type of uncertainty is underestimated by participants.
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| 2. |
- Moberg, Christina, et al.
(författare)
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De unga gör helt rätt när de stämmer staten
- 2022
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Ingår i: Aftonbladet. - 1103-9000.
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- 1 620 forskare och lärare i forskarvärlden: Vi ställer oss bakom Auroras klimatkrav
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| 3. |
- Bonde, J. P. E., et al.
(författare)
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COVID-19-related hospital admission in spouses of partners in at-risk occupations
- 2023
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Ingår i: Scandinavian Journal of Work Environment & Health. - : Scandinavian Journal of Work, Environment and Health. - 0355-3140 .- 1795-990X. ; 49:3, s. 193-200
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Tidskriftsartikel (refereegranskat)abstract
- Objective This study aimed to quantify the risk of COVID-19-related hospital admission in spouses living with partners in at-risk occupations in Denmark during 2020-21.Methods Within a registry-based cohort of all Danish employees (N=2 451 542), we identified cohabiting couples, in which at least one member (spouse) held a job that according to a job exposure matrix entailed low risk of occupational exposure to SARS-CoV-2 (N=192 807 employees, 316 COVID-19 hospital admissions). Risk of COVID-19-related hospital admission in such spouses was assessed according to whether their partners were in jobs with low, intermediate or high risk for infection. Overall and sex-specific incidence rate ratios (IRR) of COVID-19-related hospital admission were computed by Poisson regression with adjustment for relevant covariates.Results The risk of COVID-19-related hospital admission was increased among spouses with partners in highrisk occupations [adjusted IRR (IRRadj)1.59, 95% confidence interval (CI) 1.1-2.2], but not intermediate-risk occupations (IRRadj 0.97 95% 0.8-1.3). IRR for having a partner in a high-risk job was elevated during the first three pandemic waves but not in the fourth (IRRadj 0.48 95% CI 0.2-1.5). Sex did not modify the risk of hospital admission.Conclusions SARS-CoV-2 transmission at the workplace may pose an increased risk of severe COVID-19 among spouses in low-risk jobs living with partners in high-risk jobs, which emphasizes the need for preventive measures at the workplace in future outbreaks of epidemic contagious disease. When available, effective vaccines seem essential.
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| 4. |
- Bonde, J. P. E., et al.
(författare)
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Occupational risk of SARS-CoV-2 infection: a nationwide register-based study of the Danish workforce during the COVID-19 pandemic, 2020-2021
- 2023
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Ingår i: Occupational and Environmental Medicine. - : BMJ. - 1351-0711 .- 1470-7926. ; 80:4, s. 202-208
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Tidskriftsartikel (refereegranskat)abstract
- ObjectiveMost earlier studies on occupational risk of COVID-19 covering the entire workforce are based on relatively rare outcomes such as hospital admission and mortality. This study examines the incidence of SARS-CoV-2 infection by occupational group based on real-time PCR (RT-PCR) tests. MethodsThe cohort includes 2.4 million Danish employees, 20-69 years of age. All data were retrieved from public registries. The incidence rate ratios (IRRs) of first-occurring positive RT-PCR test from week 8 of 2020 to week 50 of 2021 were computed by Poisson regression for each four-digit Danish Version of the International Standard Classification of Occupations job code with more than 100 male and 100 female employees (n=205). Occupational groups with low risk of workplace infection according to a job exposure matrix constituted the reference group. Risk estimates were adjusted by demographic, social and health characteristics including household size, completed COVID-19 vaccination, pandemic wave and occupation-specific frequency of testing. ResultsIRRs of SARS-CoV-2 infection were elevated in seven healthcare occupations and 42 occupations in other sectors, mainly social work activities, residential care, education, defence and security, accommodation and transportation. No IRRs exceeded 2.0. The relative risk in healthcare, residential care and defence/security declined across pandemic waves. Decreased IRRs were observed in 12 occupations. DiscussionWe observed a modestly increased risk of SARS-CoV-2 infection among employees in numerous occupations, indicating a large potential for preventive actions. Cautious interpretation of observed risk in specific occupations is needed because of methodological issues inherent in analyses of RT-PCR test results and because of multiple statistical tests.
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| 5. |
- Diwan, Salwan, et al.
(författare)
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Nudging strategies to influence prescribers' behavior toward reducing opioid prescriptions : a systematic scoping review
- 2024
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Ingår i: Journal of international medical research. - : Sage Publications. - 0300-0605 .- 1473-2300. ; 52:9
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Forskningsöversikt (refereegranskat)abstract
- OBJECTIVE: This systematic scoping review aimed to map the literature on the use of various nudging strategies to influence prescriber behavior toward reducing opioid prescriptions across diverse healthcare settings.METHODS: A systematic database search was conducted using seven electronic databases. Only articles published in English were included. A total of 2234 articles were identified, 35 of which met the inclusion criteria. Two independent dimensions were used to describe nudging strategies according to user action and the timing of their implementation.RESULTS: Six nudging strategies were identified. The most common strategy was default choices, followed by increasing salience of information or incentives and providing feedback. Moreover, 32 studies used the electronic health record as an implementation method, and 29 reported significant results. Most of the effective interventions were multicomponent interventions (i.e., combining nudge strategies and non-nudge components).CONCLUSIONS: Most nudging strategies used a passive approach, such as defaulting prescriptions to generics and requiring no action from the prescriber. Although reported as effective, this approach often operates under the prescriber's radar. Future research should explore the ethical implications of nudging strategies.INPLASY registration number: 202420082.
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| 6. |
- Diwan, Salwan, et al.
(författare)
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Nudging strategies to influence prescribers' behavior toward reducing opioid prescriptions : a systematic scoping review
- 2024
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Ingår i: Journal of International Medical Research. - : Sage Publications. - 1473-2300 .- 0300-0605. ; 52:9
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: This systematic scoping review aimed to map the literature on the use of various nudging strategies to influence prescriber behavior toward reducing opioid prescriptions across diverse healthcare settings.METHODS: A systematic database search was conducted using seven electronic databases. Only articles published in English were included. A total of 2234 articles were identified, 35 of which met the inclusion criteria. Two independent dimensions were used to describe nudging strategies according to user action and the timing of their implementation.RESULTS: Six nudging strategies were identified. The most common strategy was default choices, followed by increasing salience of information or incentives and providing feedback. Moreover, 32 studies used the electronic health record as an implementation method, and 29 reported significant results. Most of the effective interventions were multicomponent interventions (i.e., combining nudge strategies and non-nudge components).CONCLUSIONS: Most nudging strategies used a passive approach, such as defaulting prescriptions to generics and requiring no action from the prescriber. Although reported as effective, this approach often operates under the prescriber's radar. Future research should explore the ethical implications of nudging strategies. INPLASY registration number: 202420082.
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| 7. |
- Fagerberg, Björn, et al.
(författare)
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Extremvärme ett ökande problem för globala folkhälsan : Klimatförändringarnas negativa hälsoeffekter drabbar även Sverige
- 2016
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Ingår i: Läkartidningen. - 0023-7205 .- 1652-7518. ; 113:31-33
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Forskningsöversikt (övrigt vetenskapligt/konstnärligt)abstract
- High temperatures have a direct impact on body functions. Heat waves increase mortality risks due to myocardial infarction, stroke, and pulmonary disease. Cold temperatures also increase mortality, but with a longer latency. A recent study found only a small difference between the minimal mortality temperature (MMT) and the temperatures at which mortality rose steeply, although the majority of deaths occurred at temperatures below MMT. Global climate change with increasing temperatures seriously threatens health, work capacity, and generation of household incomes, particularly among poor people in hot countries. In Sweden, heat waves increase mortality in vulnerable groups of elderly people and patients with chronic heart and lung diseases, as well as those performing intensive physical work in hot environments. The medical profession can play an important role not only in prevention of climate change, but also in adaptation to climate change with the goal of minimizing health risks.
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| 8. |
- Hulthén, Erik, 1980, et al.
(författare)
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Implementing Real-time Optimization on a secondary Cone Crusher for Iron Ore Production, part 1
- 2013
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Ingår i: Preprints Conference in Minerals Engineering, Luleå, 5-6 February 2013. ; , s. 71-80
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Cone crushers are often used as an intermediate comminution step in the mining industry. Real-time feedback data on the product streams can be obtained by applying mass-flow sensors to the process. Systems used for controlling the Closed Side Setting (CSS) on cone crushers are widely used to compensate for wear of the manganese crushing liners and to protect the machines from overloads. With a frequency converter also the eccentric speed in a cone crusher can be adjusted in real-time in addition to the CSS. The eccentric speed affects the dynamic interaction between the rock material and the crusher liners. The adjustment of these two online parameters in real time can result in an increased potential for production yield; however, a nontrivial optimization problem with a large solution space also arises. As the feed material also varies, and the wear is highly evident, the optimal setting for the parameters varies in time. In this paper we report on the preparation of a secondary cone crusher for real-time optimization. The cone crusher, a Sandvik CH680, has got a frequency converter installed and the temperature in the crusher is measured in order to ensure that the crusher as a mechanical machine is working under good operating conditions. The conveyor belts around the crusher have all been equipped with mass-flow meters. Thus the different product yields from the crushing plant can be monitored continuously. The results of the electrical and instrumental installations are that both the CSS and now also the eccentric speed can be operated and monitored in real time without interrupting the process at one of LKAB Malmbergets secondary cone crushers. The first guiding tests indicate a more beneficial operating point, where a higher power consumption can be achieved in the crusher without increasing the pressure as much. The results of the capacities, both the crusher and the crushing stage, indicate the same direction. There are operating points which are more beneficial than others, and it is not the nominal one that is the best. The range of the change in capacity of the circuit is -6.1% to +2.3% from the nominal point.
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| 9. |
- Malm, Ellen, et al.
(författare)
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Maternal Serum Concentrations of Per- and Polyfluoroalkyl Substances in Early Pregnancy and Small for Gestational Age in Southern Sweden
- 2023
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Ingår i: Toxics. - 2305-6304. ; 11:9
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Tidskriftsartikel (refereegranskat)abstract
- Small for gestational age (SGA) is considered an adverse birth outcome. Per- and polyfluoralkyl substances (PFAS) have become increasingly investigated as contributing environmental factors, thus far with inconclusive results. The current study aimed to investigate the hypothesized association between increased maternal PFAS levels in early pregnancy and an increased risk for SGA birth. This population-based study used data from a sample of children born in Scania, Southern Sweden, between 1995 and 2009. Two groups were compared: cases born with SGA (n = 298) and non-SGA controls (n = 580). The cases consisted of two subgroups: one included women whose children’s growth in late pregnancy was in the lowest quartile, and another included women from the remaining growth quartiles. Corresponding maternal serum samples were collected from a biobank and analyzed for concentrations of four types of PFAS: perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA), perfluorohexane sulfonic acid (PFHxS), and perfluorooctane sulfonic acid (PFOS) using liquid chromatography–tandem mass spectrometry (LC/MS/MS). The results were combined with information from birth registers and analyzed using Mann–Whitney U-tests and logistic regression—unadjusted as well as adjusted for potential confounders. In conclusion, elevated maternal concentrations of PFAS were not associated with an increased risk of SGA birth. However, significant ORs were observed in a subgroup analysis restricted to women of Nordic origin (unadjusted OR 3.2 and adjusted OR 2.4) for PFHxS.
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| 10. |
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