Publications by authors named "Lars T Sorensen"

Article Synopsis
  • Ulcerative colitis (UC) is a disease that causes inflammation, making it hard to monitor without invasive procedures like endoscopy; this study explores serum extracellular matrix (ECM) fragments as possible noninvasive indicators of disease severity and treatment effectiveness.
  • The research involved 49 UC patients and 50 healthy controls, measuring various ECM biomarkers at three different time points, revealing that certain markers like PRO-C11 and PRO-C3 can effectively predict responses to treatment and differentiate between disease severity levels.
  • The findings suggest that serum ECM fragments correlate with endoscopic disease severity and may serve as future therapeutic targets to help prevent intestinal damage in UC patients.
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Background And Aims: Despite advances in the medical treatment of Crohn's disease [CD], many patients will still need bowel resections and face the subsequent risk of recurrence and re-resection. We describe contemporary re-resection rates and identify disease-modifying factors and risk factors for re-resection.

Methods: We conducted a retrospective, population-based, individual patient-level data cohort study covering 47.

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Background: Endoscopic retrograde cholangiography (ERC) with stone extraction and papillotomy with subsequent laparoscopic cholecystectomy-the two-step approach-is the standard treatment of common bile duct stones in many countries. However, ERC is associated with a high risk of complications and more than half of patients require multiple ERCs. Meta-analyses of randomised clinical trials find no major differences of the two-step approach in comparison with laparoscopic cholecystectomy with intraoperative laparoscopic stone clearance-the one-step approach.

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Background And Objective: Exposures of gallstones and treatments thereof in relation to development of cancer have not been explored before in long-term follow-up studies. Our objective was to determine whether symptomatic gallstones, cholecystectomy, or sphincterotomy were associated with development of upper gastrointestinal cancers.

Methods: This is a nationwide cohort study of persons born in Denmark 1930-1984 included from age 30 years with long-term follow-up (1977-2014).

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Background And Objective: Gallstones are highly prevalent, and more than 9000 cholecystectomies are performed annually in Denmark. The aim of this guideline was to improve the clinical course of patients with gallstone disease including a subgroup of high-risk patients. Outcomes included reduction of complications, readmissions, and need for additional interventions in patients with uncomplicated gallstone disease, acute cholecystitis, and common bile duct stones (CBDS).

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Two-stage treatment of common bile duct stones by Endoscopic Retrograde Cholangio-Pancreatography and subsequent laparoscopic cholecystectomy is well established. In many cases multiple procedures are needed before clearance of the common bile duct is obtained. This study aimed to describe the clinical course from common bile duct stone diagnosis to successful clearance.

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Background: Percutaneous cholecystostomy is frequently used as a treatment option for acute calculous cholecystitis in patients unfit for surgery. There is sparse evidence on the long-term impact of cholecystostomy on gallstone-related morbidity and mortality in patients with acute calculous cholecystitis. This study describes the long-term outcome of acute calculous cholecystitis following percutaneous cholecystostomy compared to conservative treatment.

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Background: Gallstone disease is highly prevalent and is associated with systemic inflammation.

Aims: To determine whether screen-detected gallstones or cholecystectomy are associated with the occurrence of autoimmune and autoinflammatory diseases and the most common subgroups thereof.

Methods: A cohort study of three randomly selected general population samples from Copenhagen was performed.

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Background And Aim: A risk-stratified approach for selecting patients likely to harbor common bile duct (CBD) stones to proceed directly to endoscopic or surgical stone clearance, rather than undergo less invasive testing, has been proposed. We assessed the performance of three clinical algorithms used to predict CBD stones.

Methods: All patients undergoing first-time endoscopic retrograde cholangiopancreatography (ERCP) in 2011-2012 as a result of suspected CBD stones were enrolled prospectively in a clinical database.

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Objectives: The objectives for this study were to examine the associations between metabolic biomarkers of obesity including insulin resistance, vascular dysfunction, systemic inflammation, genetic susceptibility and ultrasound proven gallstone disease or cholecystectomy in a population-based cross-sectional study.

Material And Methods: A total of 2650 participants were included, of whom 422 had gallstone disease. Associations between selected metabolic biomarkers and gallstone disease were estimated by multivariable logistic regression models and expressed as odds ratio (OR) and 95% confidence interval (CI).

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Knowledge about temporal associations for screen-detected gallstone disease and cardiovascular disease is limited. The objective of this study was to determine if screen-detected gallstones or cholecystectomy was associated with development of cardiovascular disease. A cohort study of three randomly selected groups from the general population of Copenhagen was performed.

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Background & Aims: Knowledge of temporal associations between screen-detected gallstone disease and specific cancers is limited. The objective of this study was to determine if screen-detected gallstones or cholecystectomy are associated with occurrence of gastrointestinal and nongastrointestinal cancers.

Methods: We performed a cohort study of 3 randomly selected groups from the general population of Copenhagen.

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Background: High rates of persistent symptoms are found following cholecystectomy in patients with gallstones. The aim of this population based cohort study was to determine which symptoms were associated with the development of clinical gallstone events in a population unaware of their gallstones.

Material And Methods: Three random population samples from Copenhagen (N = 6037) were examined with ultrasound during 1982-1994.

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Objectives: The objective of this cohort study was to determine whether subjects with gallstone disease identified by screening of a general population had increased overall mortality when compared to gallstone-free participants and to explore causes of death.

Methods: The study population (N = 5928) was examined 1982-1992 and included an abdominal ultrasound examination to assess gallstone status, a physical examination, blood samples, and a questionnaire about medical history. Participants were followed up through national registers until 2015.

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Gallstone disease is highly prevalent in the general population and is a major gastrointestinal cause of hospital admissions. The objectives were to determine whether circulating levels of 25-hydroxyvitamin D were associated to ultrasound proven gallstones or cholecystectomy in a general population sample. Determinants of vitamin D status were also explored.

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Background And Aim: Knowledge about determinants for clinical events in gallstone carriers is missing. The aim of this cohort study was to identify determinants of clinical gallstone events during long-term follow-up of a population unaware of their gallstones.

Methods: Three randomly selected groups from the general population of Copenhagen (n = 6 037) underwent ultrasound examinations to detect gallstones in the period 1982-1994.

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Introduction. Symptoms associated with newly formed gallstones have never been studied in a population unaware of their gallstones. The objective of this population-based cohort study was to determine which debut of abdominal symptoms was associated with newly formed gallstones.

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Observational studies have shown that poor nutritional status or obesity, smoking, alcohol drinking/abuse, and physical fitness are associated to a variety of poor surgical outcomes. Interventional studies show some effect of preoperative smoking cessation, alcohol abstinence, perioperative alcohol intervention, and exercise on wound healing and infectious outcomes. Patients scheduled for benign surgery should be encouraged to smoking cessation and alcohol abstinence.

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Objective: Only few determinants of gallstone formation have been identified in cohort studies. The aim was to identify further determinants for gallstones in a Danish cohort and to perform a meta-analysis of results from existing cohorts.

Material And Methods: Data from a cohort study was used.

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Background: Soluble urokinase plasminogen activator receptor (suPAR) is a stable inflammatory biomarker. In patients, suPAR is a marker of disease presence, severity and prognosis. In the general population, suPAR is predictive of disease development, such as diabetes and cardiovascular disease and, in smokers, predictive of long-term lung cancer development.

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Background & Aims: No one knows exactly what proportion of gallstones cause clinical events among subjects unaware of their gallstone status. We investigated the long-term occurrence of clinical events of gallstones and associations between ultrasound observations and clinical events.

Methods: We analyzed data from 3 randomly selected groups in the general population of urban Copenhagen (age, 30-70 y) participating in an international study of cardiovascular risk factors (the Multinational mONItoring of trends and determinants in CArdiovascular disease study).

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Background: Alcohol consumption causes multiple comorbidities with potentially negative outcome after operations. The aims are to study the association between alcohol consumption and post-operative non-surgical site infections and mortality and to determine the impact of peri-operative interventions.

Methods: MEDLINE, Embase, and The Cochrane Library were searched systematically.

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Background: Disturbed metabolism in the extracellular matrix (ECM) contributes to formation of abdominal wall hernias. The aim of this study was to gain deeper insight into the ECM turnover in hernia patients by analyzing serum biomarkers specifically reflecting collagen synthesis and breakdown in the interstitial matrix (types I, III, and V collagens) and in the basement membrane (type IV collagen).

Material And Methods: Patients with 3 different types of hernias were included: Primary unilateral inguinal hernia (n = 17), multiple hernias defined as ≥3 hernias (n = 21), and incisional hernia (n = 25).

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Incisional hernia formation is a common complication to laparotomy and possibly associated with alterations in connective tissue metabolism. Matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) are closely involved in the metabolism of the extracellular matrix. Our aim was to study serum levels of multiple MMPs and TIMPs in patients with and without incisional hernia.

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