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Clinical Epidemiology

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https://www.readbyqxmd.com/read/29138600/effects-of-chronic-exposure-of-hydroxychloroquine-chloroquine-on-the-risk-of-cancer-metastasis-and-death-a-population-based-cohort-study-on-patients-with-connective-tissue-diseases
#1
L Fardet, I Nazareth, I Petersen
Background: Hydroxychloroquine and chloroquine may reduce the risk of cancer as they inhibit autophagy, in particular, in people with connective tissue diseases. Methods: The hazard ratios of cancers, metastases, and death were assessed in adults with connective tissue diseases prescribed hydroxychloroquine/chloroquine for at least 1 year in comparison with unexposed individuals with the same underlying conditions. A competing risk survival regression analysis was performed...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/29138599/mortality-in-adults-with-and-without-diabetes-is-the-gap-widening
#2
Zhiqiang Wang, Huiying Zhang, Meina Liu
Objective: We aimed to assess if the gap in mortality between adults with and without diabetes has widened over time in US adults. Methods and study design: This cohort study included 44,041 adults with diabetes from the US National Health Interview Survey between 1986 and 2009 linked to the National Mortality Index data up to 2011. Each participant with diabetes was matched to two participants without diabetes by age, sex, race, survey year, and region of residence (88,082 persons without diabetes)...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/29138598/familial-aggregation-of-myasthenia-gravis-in-affected-families-a-population-based-study
#3
Fu-Chao Liu, Chang-Fu Kuo, Lai-Chu See, Hsin-I Tsai, Huang-Ping Yu
Introduction: Myasthenia gravis (MG) is clinically heterogeneous and can be life-threatening if bulbar or respiratory muscles are involved. However, relative contributions of genetic, shared, and nonshared environmental factors to MG susceptibility remain unclear. The aim of this study was to examine the familial aggregation and heritability of MG and the relative risks (RRs) of other autoimmune diseases in the relatives of patients with MG. Methods: A population-based family study using the Taiwan National Health Insurance (NHI) Database was conducted...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/29123424/liver-related-morbidity-and-mortality-in-patients-with-chronic-hepatitis-c-and-cirrhosis-with-and-without-sustained-virologic-response
#4
Sofie Hallager, Steen Ladelund, Peer Brehm Christensen, Mette Kjær, Birgit Thorup Roege, Karin Elmegaard Grønbæk, Erika Belard, Toke S Barfod, Lone Galmstrup Madsen, Jan Gerstoft, Britta Tarp, Henrik Bygum Krarup, Nina Weis
Background: Chronic hepatitis C (CHC) causes liver cirrhosis in 5%-20% of patients, leading to increased morbidity and mortality. This study aimed to estimate liver-related morbidity and mortality among patients with CHC and cirrhosis in Denmark with and without antiviral treatment and sustained virologic response (SVR). Furthermore we aimed to estimate the rate of hepatocellular carcinoma (HCC) and decompensation associated with certain prognostic factors. Materials and methods: Patients with CHC and cirrhosis registered in the Danish Database for Hepatitis B and C were eligible...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/29066933/healthy-lifestyle-behavior-and-risk-of-long-duration-troublesome-neck-pain-or-low-back-pain-among-men-and-women-results-from-the-stockholm-public-health-cohort
#5
Eva Skillgate, Oscar Javier Pico-Espinosa, Johan Hallqvist, Tony Bohman, Lena W Holm
BACKGROUND: The role of healthy lifestyle behavior (HLB) in terms of physical activity, alcohol intake, smoking, and diet put together has not yet been explored for the risk of low back pain (LBP) and neck pain (NP). Our aim was to study if an HLB is protective against the onset of long duration troublesome LBP and NP in men and women. METHODS: Two cohorts from the Stockholm Public Health Cohort, free from LBP (n=12,483) and NP (n=10,539), respectively, in 2006, were surveyed with questionnaires...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/29042817/accuracy-of-the-hypospadias-diagnoses-and-surgical-treatment-registrations-in-the-danish-national-patient-register
#6
Linn Håkonsen Arendt, Andreas Ernst, Morten Søndergaard Lindhard, Anne Aggerholm Jønsson, Tine Brink Henriksen, Jørn Olsen, Jorgen Thorup, L Henning Olsen, Cecilia Høst Ramlau-Hansen
PURPOSE: The Danish National Health registers provide a valuable data source that offers unique opportunities for observational research, including studies on the congenital anomaly hypospadias. The accuracy of the diagnosis and surgical treatment registration of hypospadias in the Danish National Patient Register (DNPR) remains unknown. PATIENTS AND METHODS: We randomly sampled 500 patients diagnosed with hypospadias in the DNPR from January 1, 1995 to December 31, 2012...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28979165/validation-of-autism-spectrum-disorder-diagnoses-recorded-in-the-clinical-practice-research-datalink-1990-2014
#7
Katrina Wilcox Hagberg, Susan S Jick
BACKGROUND: Prior studies have reported that the validity of autism spectrum disorder (ASD) diagnoses recorded in the Clinical Practice Research Datalink (CPRD) was high; however, diagnostic criteria and screening practices have changed since the last study was published in 2004. OBJECTIVES: 1) To calculate the positive predictive value (PPV) of ASD diagnoses recorded in the CPRD compared to original medical records and 2) to describe characteristics of cases and use of clinical codes that support the ASD diagnosis as recorded in the electronic data by general practitioners over time...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28979164/psychiatric-conditions-and-general-practitioner-attendance-prior-to-hpv-vaccination-and-the-risk-of-referral-to-a-specialized-hospital-setting-because-of-suspected-adverse-events-following-hpv-vaccination-a-register-based-matched-case-control-study
#8
Tina Hovgaard Lützen, Bodil Hammer Bech, Jesper Mehlsen, Claus Høstrup Vestergaard, Lene Wulff Krogsgaard, Jørn Olsen, Mogens Vestergaard, Oleguer Plana-Ripoll, Dorte Rytter
AIM: No association between human papilloma virus (HPV) vaccination and numerous diseases has been found. Still, a large number of Danish women are reporting suspected adverse events. Other factors may play a role, and the aim of this study is to examine the association between psychiatric conditions, general practitioner (GP) attendance and indicators of psychological symptoms prior to HPV vaccination and the risk of referral to an HPV center following vaccination. STUDY DESIGN AND SETTING: Register-based, matched case-control study...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28919820/prediction-models-for-the-mortality-risk-in-chronic-dialysis-patients-a-systematic-review-and-independent-external-validation-study
#9
Chava L Ramspek, Pauline Wm Voskamp, Frans J van Ittersum, Raymond T Krediet, Friedo W Dekker, Merel van Diepen
OBJECTIVE: In medicine, many more prediction models have been developed than are implemented or used in clinical practice. These models cannot be recommended for clinical use before external validity is established. Though various models to predict mortality in dialysis patients have been published, very few have been validated and none are used in routine clinical practice. The aim of the current study was to identify existing models for predicting mortality in dialysis patients through a review and subsequently to externally validate these models in the same large independent patient cohort, in order to assess and compare their predictive capacities...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28919819/migraine-and-risk-of-stroke-and-acute-coronary-syndrome-in-two-case-control-studies-in-the-danish-population
#10
Merete Osler, Ida Kim Wium-Andersen, Martin Balslev Jørgensen, Terese Sara Høj Jørgensen, Marie Kim Wium-Andersen
INTRODUCTION: Migraine has consistently been associated with increased risk of ischemic stroke, while the evidence for a relation with other types of stroke or coronary outcomes is limited. We examined the association between migraine and stroke and acute coronary syndrome (ACS) subtypes and the influence of potential confounding factors. METHODS: All first-time hospital contacts for stroke (n=155,216) or ACS (n=97,799) were identified in Danish National Patient Registers and matched with 2 control groups of the background population...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28894391/comment-on-fecal-occult-blood-versus-dna-testing-indirect-comparison-in-a-colorectal-cancer-screening-population
#11
COMMENT
David A Ahlquist
No abstract text is available yet for this article.
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28883742/somatic-symptom-profiles-in-the-general-population-a-latent-class-analysis-in-a-danish-population-based-health-survey
#12
Marie Eliasen, Torben Jørgensen, Andreas Schröder, Thomas Meinertz Dantoft, Per Fink, Chalotte Heinsvig Poulsen, Nanna Borup Johansen, Lene Falgaard Eplov, Sine Skovbjerg, Svend Kreiner
PURPOSE: The aim of this study was to identify and describe somatic symptom profiles in the general adult population in order to enable further epidemiological research within multiple somatic symptoms. METHODS: Information on 19 self-reported common somatic symptoms was achieved from a population-based questionnaire survey of 36,163 randomly selected adults in the Capital Region of Denmark (55.4% women). The participants stated whether they had been considerably bothered by each symptom within 14 days prior to answering the questionnaire...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28860860/positive-predictive-values-of-icd-10-codes-to-identify-incident-acute-pancreatitis-and-incident-primary-malignancy-in-the-scandinavian-national-patient-registries-among-women-with-postmenopausal-osteoporosis
#13
Troels Munch, Lotte B Christensen, Kasper Adelborg, Grethe S Tell, Ellen M Apalset, Anna Westerlund, Ylva T Lagerros, Johnny Kahlert, Fei Xue, Vera Ehrenstein
BACKGROUND: Validation of definitions used to identify conditions of interest is imperative to epidemiologic studies based on routinely collected data. The objective of the study was thus to estimate positive predictive values (PPVs) of International Classification of Diseases, 10th Revision (ICD-10) codes to identify cases of incident acute pancreatitis leading to hospitalization and incident primary malignancy in the Scandinavian (Denmark, Norway, and Sweden) national patient registries in women with postmenopausal osteoporosis (PMO)...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28848363/misclassification-of-hypertrophic-cardiomyopathy-validation-of-diagnostic-codes
#14
Peter Magnusson, Andreas Palm, Eva Branden, Stellan Mörner
PURPOSE: To validate diagnostic codes for hypertrophic cardiomyopathy (HCM), analyze misclassfications, and estimate the prevalence of HCM in an unselected Swedish regional cohort. PATIENTS AND METHODS: Using the hospitals' electronic medical records (used for the Swedish National Patient Register), we identified 136 patients from 2006 to 2016 with the HCM-related codes 142.1 and 142.2 (International Classification of Diseases). RESULTS: Of a total of 129 residents in the catchment area, 88 patients were correctly classified as HCM (positive predictive value 68...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28814899/irritable-bowel-symptoms-and-the-development-of-common-mental-disorders-and-functional-somatic-syndromes-identified-in-secondary-care-a-long-term-population-based-study
#15
Chalotte Heinsvig Poulsen, Lene Falgaard Eplov, Carsten Hjorthøj, Marie Eliasen, Sine Skovbjerg, Thomas Meinertz Dantoft, Andreas Schröder, Torben Jørgensen
OBJECTIVE: Irritable bowel syndrome (IBS) is associated with mental vulnerability, and half of patients report comorbid somatic and mental symptoms. We aimed to investigate the relationship between an IBS symptom continuum and the subsequent development of common mental disorders (CMDs) and functional somatic syndromes (FSSs). METHODS AND STUDY DESIGN: A longitudinal population-based study comprising two 5-year follow-up studies, Dan-MONICA 1 (1982-1987) and Inter99 (1999-2004), recruited from the western part of Copenhagen County...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28790866/incidence-clinical-presentation-and-outcome-of-hiv-1-associated-cryptococcal-meningitis-during-the-highly-active-antiretroviral-therapy-era-a-nationwide-cohort-study
#16
Madeleine Touma, Line D Rasmussen, Raquel Martin-Iguacel, Frederik Neess Engsig, Nina Breinholt Stærke, Mette Stærkind, Niels Obel, Magnus Glindvad Ahlström
BACKGROUND: Human immunodeficiency virus (HIV) infection with advanced immunosuppression predisposes to cryptococcal meningitis (CM). We describe the incidence, clinical presentation, and outcome of CM in HIV-infected individuals during the highly active antiretroviral therapy (HAART) era. METHODS: A nationwide, population-based cohort of HIV-infected individuals was used to estimate incidence and mortality of CM including risk factors. A description of neurological symptoms of CM at presentation and follow-up in the study period 1995-2014 was included in this study...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28761377/fecal-occult-blood-versus-dna-testing-indirect-comparison-in-a-colorectal-cancer-screening-population
#17
Hermann Brenner, Hongda Chen
BACKGROUND: A multitarget stool DNA test (MSDT) that showed higher sensitivity but lower specificity than a fecal immunochemical test (FIT) for hemoglobin in one recent study from the US and Canada, is increasingly used for colorectal cancer (CRC) screening, despite its ~20-fold higher costs compared to FITs. We aimed to assess diagnostic performance of a quantitative FIT in an independent study among participants of screening colonoscopy and to compare it with the previously reported performance of MSDT...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28744162/validity-of-an-automated-algorithm-using-diagnosis-and-procedure-codes-to-identify-decompensated-cirrhosis-using-electronic-health-records
#18
Mei Lu, Wadih Chacra, David Rabin, Loralee B Rupp, Sheri Trudeau, Jia Li, Stuart C Gordon
Viral hepatitis-induced cirrhosis can progress to decompensated cirrhosis. Clinical decompensation represents a milestone event for the patient with cirrhosis, yet there remains uncertainty regarding precisely how to define this important phenomenon. With the development of broader treatment options for cirrhotic hepatitis patients, efficient identification of liver status before evolving to decompensated cirrhosis could be life-saving, but research on the topic has been limited by inconsistencies across studies, populations, and case-confirmation methods...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28740433/erratum-validation-of-second-trimester-miscarriages-and-spontaneous-deliveries-corrigendum
#19
(no author information available yet)
[This corrects the article on p. 517 in vol. 7, PMID: 26715859.].
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28740432/the-criterion-validity-of-the-web-based-major-depression-inventory-when-used-on-clinical-suspicion-of-depression-in-primary-care
#20
Marie Germund Nielsen, Eva Ørnbøl, Per Bech, Mogens Vestergaard, Kaj Sparle Christensen
BACKGROUND: The Major Depression Inventory (MDI) is widely used in Danish general practice as a screening tool to assess depression in symptomatic patients. Nevertheless, no validation studies of the MDI have been performed. The aim of this study was to validate the web-based version of the MDI against a fully structured telephone interview in a population selected on clinical suspicion of depression (ie, presence of two or three core symptoms of depression) in general practice. MATERIALS AND METHODS: General practitioners (GPs) invited consecutive persons suspected of depression to complete the web-based MDI in a primary care setting...
2017: Clinical Epidemiology
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