Publications by authors named "Jan Valentin"

The paper deals with an analysis of the amount of 16 polycyclic aromatic hydrocarbons (PAHs (Polycyclic aromatic hydrocarbons-16 defined by US EPA.)) released from reclaimed asphalt mixtures used in base layers of road surfaces and in binder layers in road construction using cold in-place recycling. For the ten samples tested, the sum of 16 PAHs was determined directly for the crushed asphalt mixture and for its 24-h leachate.

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Introduction: The COVID-19 pandemic disrupted global economies, social structures, and public health systems. However, Denmark stood out as an exception, maintaining steady life expectancy during this period. This raises important questions about the factors that strengthened the Danish healthcare system and society against the pandemic's challenges.

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Introduction: Patients with pulmonary embolism (PE) experience impaired functional ability and reduced quality of life long after discharge from the hospital. However, there are no structured follow-up programmes in Denmark for these patients, and there is considerable variation in practice patterns of post-PE management. No studies have investigated the effectiveness of structured follow-up care models in patients with PE.

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Article Synopsis
  • A nationwide study in Denmark from 2010 to 2020 analyzed the relationship between socioeconomic status (SES) and poststroke dementia (PSD) among stroke patients, focusing on income, education, and employment.
  • The study included 98,489 patients and found that those with low SES had significantly higher rates of PSD, with low income linked to a 1.24 times increase, low education to a 1.11 times increase, and unemployment to a 1.57 times increase in dementia rates.
  • Disparities were more pronounced in certain groups, notably women, immigrants, and patients younger than 70, indicating that socioeconomic factors play a crucial role in long-term stroke outcomes beyond typical risk factors.
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Article Synopsis
  • The study analyzes the final diagnoses and mortality rates (30-day and 1-year) in patients treated with salbutamol by ambulance personnel for respiratory distress in Central Denmark (2018-2019).
  • It includes 6,318 ambulance transports, highlighting conditions such as acute exacerbation of chronic obstructive pulmonary disease (AECOPD), community-acquired pneumonia (CAP), and asthma, with differing mortality rates across these groups.
  • The findings emphasize high mortality rates among those needing bronchodilator treatment, particularly in AECOPD and heart disease patients, while asthma patients and those under 18 show lower mortality, suggesting the use of inhaled bronchodilators as an important indicator of serious respiratory distress requiring prompt action.
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Background: Increasing severity of chronic obstructive pulmonary disease (COPD) is associated with increasing risk of poor outcomes. Using health registry data, we aimed to assess the association between treatment intensity levels (TIL), as a proxy for underlying COPD severity, and long-term outcomes.

Methods: Using Danish nationwide registries, we identified patients diagnosed with COPD during 2001-2016, who were alive at index date of 1 January 2017.

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. The prevalence of patients with prior stroke is increasing globally. Accordingly, there is a need for up-to-date evidence of patient-related prognostic factors for stroke recurrence, post stroke myocardial infarction (MI) and death based on long-term follow-up of stroke survivors.

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Background: Subarachnoid haemorrhage (SAH) and intraventricular haemorrhage (IVH) are associated with poor patient outcomes. Intraventricular fibrinolysis is effective in clearing IVH and improving patient survival and neurological outcome. By similar rationale, cisternal irrigation has been proposed as a potential method to accelerate haematoma clearance in SAH.

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Background: Atrial fibrillation (AF) is the most common sustained arrhythmia and results in a high risk of stroke. The number of immigrants is increasing globally, but little is known about potential differences in AF care across migrant populations.

Aim: To investigate if initiation of oral anticoagulation therapy (OAC) differs for patients with incident AF in relation to country of origin.

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Purpose: To compare patients with and without a history of mental illness on process and outcome measures in relation to prehospital and emergency surgical care for patients with perforated ulcer.

Methods: A nationwide registry-based cohort study of patients undergoing emergency surgery for perforated ulcer. We used data from the Danish Prehospital Database 2016-2017 and the Danish Emergency Surgery Registry 2004-2018 combined with data from other Danish databases.

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Background: Patient-reported outcome measures (PROMs) are valuable and necessary tools for establishing and maintaining patient-centred healthcare. The PRO-Psychiatry initiative was primarily initiated to support the patient's voice in treatment decision-making and secondarily to monitor patient-perceived quality of care. The result of the initiative is a patient-reported instrument developed in collaboration between patients and clinicians.

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Article Synopsis
  • The study aimed to assess the incidence of cardiovascular disease (CVD) and overall mortality in patients with esophageal cancer (EC) treated with curative intent, using data from Danish health registries from 2008 to 2018.
  • Findings indicated that patients with EC had a significantly higher risk of CVD hospital contacts in the year following diagnosis, with an adjusted hazard ratio of 6.1 compared to a matched general population, but this risk equalized over the next nine years.
  • The research highlights the urgent need for healthcare initiatives focused on prevention and management of CVD in esophageal cancer patients, especially given the transient increase in CVD morbidity immediately after EC diagnosis.
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Background: Remote ischemic conditioning (RIC) is a simple and noninvasive procedure that has proved to be safe and feasible in numerous smaller clinical trials. Mixed results have been found in recent large randomized controlled trials. This is a post hoc subgroup analysis of the RESIST trial (Remote Ischemic Conditioning in Patients With Acute Stroke), investigating the effect of RIC in different acute ischemic stroke etiologies, and whether an effect was modified by treatment adherence.

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Background: A high concentration of inspired supplemental oxygen may possibly cause hypercapnia and acidosis and increase mortality in patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD). Even so, patients with AECOPD are being treated with high oxygen flow rates when receiving inhalation drugs in the prehospital setting. A cluster-randomised controlled trial found that reduced oxygen delivery by titrated treatment reduced mortality-a result supported by observational studies-but the results have never been reproduced.

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Background: Atrial fibrillation and flutter (AF) is the most common sustained arrhythmia with an increasing prevalence in Western countries. However, little is known about AF among immigrants compared to non-immigrants.

Aim: To examine the incidence of hospital-diagnosed AF according to country of origin.

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Accurate estimation of ambulance transport time from the scene of incident to arrival at the emergency department (ED) is important for effective resource management and emergency care system planning. Further, differences in transport times between different urgency levels highlight the benefits of ambulance transports with highest urgency level in a setting where ambulances are allowed to not follow standard traffic rules. The objective of the study is to compare ambulance urgency level on the differences in estimates of ambulance transport times generated by Google Maps and the observed transport times in a prehospital setting where emergency vehicles have their own traffic laws.

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Background: When patients with acute ischemic stroke present with suspected large vessel occlusion in the catchment area of a primary stroke center (PSC), the benefit of direct transport to a comprehensive stroke center (CSC) has been suggested. Equipoise remains between transport strategies and the best transport strategy is not well established.

Methods: We conducted a national investigator-driven, multicenter, randomized, assessor-blinded clinical trial.

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Importance: Despite some promising preclinical and clinical data, it remains uncertain whether remote ischemic conditioning (RIC) with transient cycles of limb ischemia and reperfusion is an effective treatment for acute stroke.

Objective: To evaluate the effect of RIC when initiated in the prehospital setting and continued in the hospital on functional outcome in patients with acute stroke.

Design, Setting, And Participants: This was a randomized clinical trial conducted at 4 stroke centers in Denmark that included 1500 patients with prehospital stroke symptoms for less than 4 hours (enrolled March 16, 2018, to November 11, 2022; final follow-up, February 3, 2023).

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Aim: The complete mesocolic excision competency assessment tool (CMECAT) is a novel tool designed to assess technical skills in minimally invasive complete mesocolic excision (CME) surgery. The aim of this study was to assess construct validity and reliability of CMECAT in a clinical context.

Method: Colorectal surgeons were asked to submit video recorded laparoscopic CME resections for independent assessment of their technical abilities.

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Objective: To examine the agreement between emergency medical service (EMS) providers, neurology residents and neurology consultants, using the Cincinnati Prehospital Stroke Scale (CPSS) and the Prehospital Acute Stroke Severity Scale (PASS).

Methods: Patients with stroke, transient ischemic attack (TIA) and stroke mimic were included upon primary stroke admission or during rehabilitation. Patients were included from June 2018 to September 2019.

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Introduction: Dementia after stroke is common and is a great concern for patients and their caregivers. The objective was to investigate if intravenous thrombolysis (IVT) for acute ischemic stroke (AIS) was associated with lower risk of dementia after stroke.

Patients And Methods: When IVT was introduced in Denmark, not all eligible patients were treated due to restricted access.

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Objectives: To examine costs of care from a healthcare sector perspective within 1 year before death in patients with non-cancer diseases and patients with cancer.

Methods: This nationwide registry-based study identified all Danish citizens dying from major non-cancer diseases or cancer in 2010-2016. Applying the cost-of-illness method, we included costs of somatic hospitals, including hospital-based specialist palliative care, primary care, prescription medicine and hospice expressed in 2022 euros.

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Background: Higher incidence of acute coronary syndrome (ACS), among those with lower income, has been recognized in the most recent decades. Still, there is a paucity of data on temporal changes. This study aims to investigate 20-year time trends in income-related disparity in the incidence of ACS in Denmark.

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