Publications by authors named "Casper Pedersen"

Background: Infections in childhood remain a leading global cause of child mortality and environmental exposures seem crucial. We investigated whether urbanicity at birth was associated with the risk of infections and explored underlying mechanisms.

Methods: Children (n=633) from the COPSAC mother-child cohort were monitored daily with symptom diaries of infection episodes during the first 3 years and prospectively diagnosed with asthma until age 6 years.

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  • The study evaluates the Quality of Recovery (QoR-15) score in patients after elective lumbar spine surgery, focusing on their recovery quality during the early post-discharge phase.
  • Conducted in Denmark, the research tracked patients' QoR-15 scores pre-surgery and at specific post-discharge intervals using a mobile health app, revealing significant improvement over time.
  • Key findings show that while the overall QoR-15 score improved from discharge to day 14, only eight of the fifteen specific recovery items were influential in determining the quality of recovery, highlighting areas for further research.
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Background: Morphine-sparing effects are often used to evaluate non-opioid analgesic interventions. The exact effect that would warrant the implementation of these interventions in clinical practice (a minimally important difference) remains unclear. We aimed to determine this with anchor-based methods.

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  • Decompression surgery for lumbar spinal stenosis (LSS) is the most common spine surgery in Denmark, with around 75% of patients experiencing pain relief after one year, but 25% seeing little improvement.
  • A predictive decision support tool called PROPOSE was developed to aid discussions between doctors and LSS patients by presenting the pros and cons of surgery.
  • Evaluation of PROPOSE showed good performance in predicting outcomes for walking distance and leg pain, confirming its effectiveness in real-world clinical settings.
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Background: We recently conducted a double-blinded randomised controlled trial showing that fish-oil supplementation during pregnancy reduced the risk of persistent wheeze or asthma in the child by 30%. Here, we explore the mechanisms of the intervention.

Methods: 736 pregnant women were given either placebo or n-3 long-chain polyunsaturated fatty acids (LCPUFAs) in the third trimester in a randomised controlled trial.

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Study Design: Quantitative survey study is the study design.

Objectives: The study aims to develop a model for the factors that drive or impede the use of an artificial intelligence clinical decision support system (CDSS) called PROPOSE, which supports shared decision-making on the choice of treatment of ordinary spinal disorders.

Methods: A total of 62 spine surgeons were asked to complete a questionnaire regarding their behavioral intention to use the CDSS after being introduced to PROPOSE.

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Study Design: Observational study.

Objective: To identify associations between preoperative symptom duration and postoperative patient satisfaction.

Summary Of Background Data: Sciatica due to lumbar disk herniation (LDH) is a cause of disability and reduced quality life.

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Background: The leading principle in peri-operative pain management is multimodal analgesia, which reduces opioid requirements and associated adverse effects. Pragmatic pain trials should optimally test interventions in addition to multimodal non-opioid analgesics and interventions to ensure clinical relevance and baseline levels of opioid consumption that reflect clinical settings. We aimed to investigate opioid consumption and use of non-opioid analgesics administered adjunct to interventions in post-operative pain trials after total hip and knee arthroplasty.

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Background: Despite advances in surgical techniques and diagnostics, some patients remain unsatisfied with the result following spine surgery. One way to improve patient satisfaction may be found in better alignment of expectations. Prognostic tools might prove useful in strengthening surgeon-patient communication prior to surgery.

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Background: The patient-relevant minimal important difference for opioid consumption remains undetermined, despite its frequent use as primary outcome in trials on postoperative pain management. A minimal important difference is necessary to evaluate whether significant trial results are clinically relevant. Further, it can be used as effect size to ensure that trials are powered to find clinically relevant effects.

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  • Asthma with severe exacerbations is a leading cause of hospitalization among young children, often triggered by respiratory infections, but the genetic factors behind recurrent infections are not well understood.
  • The study aimed to identify genetic interactions linked to childhood asthma by analyzing interactions between specific genetic variations in a large sample of asthmatic and non-asthmatic children.
  • Researchers found significant interaction between the genes CDHR3 and GSDMB, which may relate to heightened immune response (IL-17A production) following viral infections, highlighting the need to focus on specific asthma subtypes for better understanding.
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Search and Rescue (SAR) missions aim to search and provide first aid to persons in distress or danger. Due to the urgency of these situations, it is important to possess a system able to take fast action and effectively and efficiently utilise the available resources to conduct the mission. In addition, the potential complexity of the search such as the ruggedness of terrain or large size of the search region should be considered.

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Study Design: Propensity-matched retrospective study of patients prospectively enrolled in Danespine.

Objective: The aim of this study was to report 5-year patient reported outcome in lumbar spinal stenosis (LSS) patients who underwent wide laminectomy (WL), segmental bilateral laminotomies (SBL), or unilateral hemilaminectomy (UHL) with bilateral decompression.

Summary Of Background Data: The optimal procedure for LSS remains controversial.

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Background: The Consolidated Standards of Reporting Trials (CONSORT) statement aims to improve transparent reporting of randomised clinical trials. It comprises a participant flow diagram with the reporting of essential numbers for enrolment, allocation and analyses. We aimed to quantify the use of participant flow diagrams in randomised clinical trials on postoperative pain management after total hip and knee arthroplasty.

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Background: Sample size determination is essential for reliable hypothesis testing in clinical trials and should rely on adequate sample size calculations with alpha, beta, variance, and an effect size being the minimal clinically important difference (MCID). This facilitates interpretation of the clinical relevance of statistically significant results. No gold standard for MCIDs exists in postoperative pain research.

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Study Design: Retrospective/prospective study.

Objective: Models based on preoperative factors can predict patients' outcome at 1-year follow-up. This study measures the performance of several machine learning (ML) models and compares the results with conventional methods.

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Aim: To identify investigated interventions for COVID-19 prevention or treatment via trial registry entries on planned or ongoing randomised clinical trials. To assess these registry entries for recruitment status, planned trial size, blinding and reporting of mortality.

Methods: We identified trial registry entries systematically via the WHO International Clinical Trials Registry Platform and 33 trial registries up to June 23, 2020.

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Background: The external validity of randomized controlled trials (RCTs) is critical for the relevance of trial results in a clinical setting. We aimed to assess the external validity of RCTs investigating postoperative pain treatment after total hip and knee arthroplasty (THA and TKA) by comparing patient characteristics in these trials with a clinical cohort. Further, we assessed the use of exclusion criteria of the included RCTs.

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