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Clinical Epidemiology

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https://www.readbyqxmd.com/read/28228662/risk-of-gynecomastia-and-breast-cancer-associated-with-the-use-of-5-alpha-reductase-inhibitors-for-benign-prostatic-hyperplasia
#1
Katrina Wilcox Hagberg, Hozefa A Divan, Shona C Fang, J Curtis Nickel, Susan S Jick
BACKGROUND: Clinical trial results suggest that 5-alpha reductase inhibitors (5ARIs) for the treatment of benign prostatic hyperplasia (BPH) may increase the risk of gynecomastia and male breast cancer, but epidemiological studies have been limited. PATIENTS AND METHODS: We conducted a cohort study with nested case-control analyses using the UK Clinical Practice Research Datalink. We identified men diagnosed with BPH who were free from Klinefelter syndrome, prostate, genital or urinary cancer, prostatectomy or orchiectomy, or evidence of gynecomastia or breast cancer...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28223847/evaluation-of-icd-10-algorithms-to-identify-hypopituitary-patients-in-the-danish-national-patient-registry
#2
Agnethe Berglund, Morten Olsen, Marianne Andersen, Eigil Husted Nielsen, Ulla Feldt-Rasmussen, Caroline Kistorp, Claus Højbjerg Gravholt, Kirstine Stochhholm
OBJECTIVE: Routinely collected health data may be valuable sources for conducting research. This study aimed to evaluate the validity of algorithms detecting hypopituitary patients in the Danish National Patient Registry (DNPR) using medical records as reference standard. STUDY DESIGN AND SETTING: Patients with International Classification of Diseases (10th edition [ICD-10]) diagnoses of hypopituitarism, or other diagnoses of pituitary disorders assumed to be associated with an increased risk of hypopituitarism, recorded in the DNPR during 2000-2012 were identified...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28203107/clinical-validation-of-immunoglobulin-a-nephropathy-diagnosis-in-swedish-biopsy-registers
#3
Simon Jarrick, Sigrid Lundberg, Adina Welander, C Michael Fored, Jonas F Ludvigsson
AIMS: The aims of this study were to validate the diagnosis of IgA nephropathy (IgAN) in Swedish biopsy registers against patient charts and to describe the clinical characteristics of patients with a biopsy indicating IgAN. METHODS: This is a population-based cohort study. Out of 4,069 individuals with a renal biopsy consistent with IgAN (biopsies performed in 1974-2011), this study reviewed patient charts of a random subset of 127 individuals. Clinical and biopsy characteristics at the time of biopsy were evaluated, and positive predictive values (PPV) were calculated with 95% confidence intervals (CI)...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28182159/incidence-type-of-atrial-fibrillation-and-risk-factors-for-stroke-a-population-based-cohort-study
#4
Cecilia Johansson, Erik Dahlqvist, Jonas Andersson, Jan-Håkan Jansson, Lars Johansson
PURPOSE: The aims of this study were to estimate the incidence of atrial fibrillation and atrial flutter (AF), to assess the presence of provoking factors and risk factors for stroke and systemic embolism, and to determine the type of AF in patients with first-diagnosed AF. PATIENTS AND METHODS: This cohort study was performed in northern Sweden between January 1, 2011 and December 31, 2012. Diagnosis registries were searched for the International Classification of Diseases-10 code for AF (I48) to identify cases of incident AF...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28182137/comment-on-an-algorithm-for-identification-and-classification-of-individuals-with-type-1-and-type-2-diabetes-mellitus-in-a-large-primary-care-database-written-by-sharma-et-al
#5
https://www.readbyqxmd.com/read/28176979/risk-of-pneumonia-and-urinary-tract-infection-within-the-first-week-after-total-hip-arthroplasty-and-the-impact-on-survival
#6
Eva N Glassou, Torben B Hansen, Alma B Pedersen
BACKGROUND: Pneumonia and urinary tract infections (UTIs) increase morbidity and mortality. There is little epidemiological evidence from large population-based studies on risk factors for these infections and subsequent mortality in total hip arthroplasty (THA) patients. AIM: To examine the risk factors of postoperative pneumonia and UTI after THA and their impact on survival. PATIENTS AND METHODS: We used the Danish Hip Arthroplasty Register to identify THAs due to osteoarthritis registered from 2000 to 2013...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28176959/a-systematic-literature-review-on-the-efficacy-effectiveness-gap-comparison-of-randomized-controlled-trials-and-observational-studies-of-glucose-lowering-drugs
#7
REVIEW
Mikkel Z Ankarfeldt, Erpur Adalsteinsson, Rolf Hh Groenwold, M Sanni Ali, Olaf H Klungel
AIM: To identify a potential efficacy-effectiveness gap and possible explanations (drivers of effectiveness) for differences between results of randomized controlled trials (RCTs) and observational studies investigating glucose-lowering drugs. METHODS: A systematic literature review was conducted in English language articles published between 1 January, 2000 and 31 January, 2015 describing either RCTs or observational studies comparing glucagon-like peptide-1 analogs (GLP-1) with insulin or comparing dipeptidyl peptidase-4 inhibitors (DPP-4i) with sulfonylurea, all with change in glycated hemoglobin (HbA1c) as outcome...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28176886/assessment-of-channeling-bias-among-initiators-of-glucose-lowering-drugs-a-uk-cohort-study
#8
Mikkel Z Ankarfeldt, Brian L Thorsted, Rolf Hh Groenwold, Erpur Adalsteinsson, M Sanni Ali, Olaf H Klungel
BACKGROUND: Channeling bias may occur when a newly marketed drug and an established drug, despite similar indications, are prescribed to patients with different prognostic characteristics (ie, confounding). AIM: To investigate channeling bias and its impact on relative effectiveness of glucagon-like peptide-1 (GLP-1) analogs versus basal insulin and dipeptidyl peptidase-4 inhibitors (DPP-4i) versus sulfonylurea. METHODS: In the UK Clinical Practice Research Datalink, patients with type 2 diabetes initiating treatment between 2006 and 2015 were included...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28115873/causal-inference-as-an-emerging-statistical-approach-in-neurology-an-example-for-epilepsy-in-the-elderly
#9
REVIEW
Lidia Mvr Moura, M Brandon Westover, David Kwasnik, Andrew J Cole, John Hsu
The elderly population faces an increasing number of cases of chronic neurological conditions, such as epilepsy and Alzheimer's disease. Because the elderly with epilepsy are commonly excluded from randomized controlled clinical trials, there are few rigorous studies to guide clinical practice. When the elderly are eligible for trials, they either rarely participate or frequently have poor adherence to therapy, thus limiting both generalizability and validity. In contrast, large observational data sets are increasingly available, but are susceptible to bias when using common analytic approaches...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28053555/antinuclear-antibody-prevalence-in-a-general-pediatric-cohort-from-mexico-city-discordance-between-immunofluorescence-and-multiplex-assays
#10
Emily C Somers, Seetha U Monrad, Jeffrey S Warren, Maritsa Solano, Lourdes Schnaas, Mauricio Hernandez-Avila, Martha Maria Tellez-Rojo, Howard Hu
OBJECTIVE: To characterize antinuclear antibody (ANA) prevalence according to distinct assay methodologies in a pediatric cohort from Mexico City, and to further examine associations with age and sex. METHODS: Serum ANA were measured by indirect immunofluorescence assay (IFA) and multiplex immunoassay in 114 children aged 9-17 years. IFA was considered positive at a cutoff titer of ≥1:80. Agreement between assay methods was assessed by kappa statistic. Sensitivity, specificity, and 95% confidence intervals (CIs) of the multiplex were computed with IFA as the reference standard...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28008283/validation-of-celiac-disease-diagnoses-recorded-in-the-danish-national-patient-register-using-duodenal-biopsies-celiac-disease-specific-antibodies-and-human-leukocyte-antigen-genotypes
#11
Stine Dydensborg Sander, Ketil Størdal, Tine Plato Hansen, Anne-Marie Nybo Andersen, Joseph A Murray, Søren Thue Lillevang, Steffen Husby
PURPOSE: The purpose of this study was to validate the celiac disease diagnoses recorded in the Danish National Patient Register. To validate the diagnoses, we used information on duodenal biopsies from a national register of pathology reports (the Patobank) and information on celiac disease-specific antibodies and human leukocyte antigen (HLA) genotypes obtained from patient medical records. PATIENTS AND METHODS: We included all the children who were born from 1995 to 2012 and who were registered as having celiac disease in the Danish National Patient Register...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27920579/validation-of-diagnostic-codes-for-charcot-marie-tooth-disease-in-the-danish-national-patient-registry
#12
Signe Vaeth, Uffe Birk Jensen, Rikke Christensen, Henning Andersen
PURPOSE: To validate the diagnostic codes for Charcot-Marie-Tooth disease (CMT) in the Danish National Patient Registry (DNPR) using positive predictive value (PPV) as a measure of validity. PATIENTS AND METHODS: We used the DNPR to identify all patients diagnosed with at least one primary CMT diagnosis at a specialized department in the Central Denmark Region during the period 1977-2012. From this population, we randomly selected 123 patients for the validation study...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27920578/recording-of-hospitalizations-for-acute-exacerbations-of-copd-in-uk-electronic-health-care-records
#13
Kieran J Rothnie, Hana Müllerová, Sara L Thomas, Joht S Chandan, Liam Smeeth, John R Hurst, Kourtney Davis, Jennifer K Quint
BACKGROUND: Accurate identification of hospitalizations for acute exacerbations of chronic obstructive pulmonary disease (AECOPD) within electronic health care records is important for research, public health, and to inform health care utilization and service provision. We aimed to develop a strategy to identify hospitalizations for AECOPD in secondary care data and to investigate the validity of strategies to identify hospitalizations for AECOPD in primary care data. METHODS: We identified patients with chronic obstructive pulmonary disease (COPD) in the Clinical Practice Research Datalink (CPRD) with linked Hospital Episodes Statistics (HES) data...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27920577/erratum-five-year-risk-of-hiv-diagnosis-subsequent-to-147-hospital-based-indicator-diseases-a-danish-nationwide-population-based-cohort-study-erratum
#14
(no author information available yet)
[This corrects the article on p. 333 in vol. 8, PMID: 27660491.].
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27877067/similar-long-term-survival-of-consecutive-in-hospital-and-out-of-hospital-cardiac-arrest-patients-treated-with-targeted-temperature-management
#15
Magaly Engsig, Helle Søholm, Fredrik Folke, Peter J Gadegaard, Julie Therese Wiis, Rune Molin, Thomas Mohr, Frederik N Engsig
OBJECTIVE: The long-term survival of in-hospital cardiac arrest (IHCA) patients treated with targeted temperature management (TTM) is poorly described. The aim of this study was to compare the outcomes of consecutive IHCA with out-of-hospital cardiac arrest (OHCA) patients treated with TTM. DESIGN SETTING AND PATIENTS: Retrospectively collected data on all consecutive adult patients treated with TTM at a university tertiary heart center between 2005 and 2011 were analyzed...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27843350/the-database-of-the-danish-renal-cancer-group
#16
REVIEW
Astrid Christine Petersen, Mette Søgaard, Frank Mehnert, Erik Højkjær Larsen, Frede Donskov, Nessn H Azawi, Bjarne Kromann-Andersen
AIM OF THE DATABASE: The main purpose of the database of the Danish Renal Cancer Group (DaRenCaData) is to improve the quality of renal cancer treatment in Denmark and secondarily to conduct observational research. STUDY POPULATION: DaRenCaData includes all Danish patients with a first-time diagnosis of renal cancer in the Danish National Pathology Registry since August 1, 2010. MAIN VARIABLES: DaRenCaData holds data on demographic characteristics, treatments, and pathology collected through linkage to central registries and online registration of a few clinical key variables...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27843349/the-danish-stroke-registry
#17
REVIEW
Søren Paaske Johnsen, Annette Ingeman, Heidi Holmager Hundborg, Susanne Zielke Schaarup, Jesper Gyllenborg
AIM OF DATABASE: The aim of the Danish Stroke Registry is to monitor and improve the quality of care among all patients with acute stroke and transient ischemic attack (TIA) treated at Danish hospitals. STUDY POPULATION: All patients with acute stroke (from 2003) or TIA (from 2013) treated at Danish hospitals. Reporting is mandatory by law for all hospital departments treating these patients. The registry included >130,000 events by the end of 2014, including 10,822 strokes and 4,227 TIAs registered in 2014...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27843348/the-danish-schizophrenia-registry
#18
REVIEW
Lone Baandrup, Charlotte Cerqueira, Lea Haller, Lene Korshøj, Inge Voldsgaard, Merete Nordentoft
AIM OF DATABASE: To systematically monitor and improve the quality of treatment and care of patients with schizophrenia in Denmark. In addition, the database is accessible as a resource for research. STUDY POPULATION: Patients diagnosed with schizophrenia and receiving mental health care in psychiatric hospitals or outpatient clinics. During the first year after the diagnosis, patients are classified as incident patients, and after this period as prevalent patients...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27843347/the-danish-quality-database-for-prehospital-emergency-medical-services
#19
REVIEW
Erika Frischknecht Christensen, Peter Anthony Berlac, Henrik Nielsen, Christian Fynbo Christiansen
AIM OF DATABASE: The aim of the Danish quality database for prehospital emergency medical services (QEMS) is to assess, monitor, and improve the quality of prehospital emergency medical service care in the entire prehospital patient pathway. The aim of this review is to describe the design and the implementation of QEMS. STUDY POPULATION: The study population consists of all "112 patient contacts" defined as emergency patients, where the entrance to health care is a 112 call forwarded to one of the five regional emergency medical coordination centers in Denmark since January 1, 2014...
2016: Clinical Epidemiology
https://www.readbyqxmd.com/read/27843346/the-danish-prostate-cancer-database
#20
REVIEW
Mary Nguyen-Nielsen, Søren Høyer, Søren Friis, Steinbjørn Hansen, Klaus Brasso, Erik Breth Jakobsen, Mette Moe, Heidi Larsson, Mette Søgaard, Anne Nakano, Michael Borre
AIM OF DATABASE: The Danish Prostate Cancer Database (DAPROCAdata) is a nationwide clinical cancer database that has prospectively collected data on patients with incident prostate cancer in Denmark since February 2010. The overall aim of the DAPROCAdata is to improve the quality of prostate cancer care in Denmark by systematically collecting key clinical variables for the purposes of health care monitoring, quality improvement, and research. STUDY POPULATION: All Danish patients with histologically verified prostate cancer are included in the DAPROCAdata...
2016: Clinical Epidemiology
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