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https://www.readbyqxmd.com/read/28723686/population-based-study-on-the-epidemiology-of-m%C3%A3-ni%C3%A3-re-s-disease
#1
Saskia G Bruderer, Daniel Bodmer, Nadja A Stohler, Susan S Jick, Christoph R Meier
BACKGROUND AND OBJECTIVE: Ménière's disease (MD) is a disorder of the inner ear typically showing recurrent acute episodes of vertigo, hearing loss, and tinnitus. Epidemiologic studies on MD are scarce. We assessed the incidence rates (IRs) of MD and describe the characteristics of MD cases, comparing them to control patients without recorded evidence of MD. STUDY DESIGN: We conducted a retrospective population-based follow-up study and a nested case-control analysis using data from the UK-based Clinical Practice Research Datalink...
July 20, 2017: Audiology & Neuro-otology
https://www.readbyqxmd.com/read/28716794/incidence-of-live-attenuated-influenza-vaccine-administration-beyond-expiry-date-in-children-and-adolescents-aged-2-17-years-in-the-uk-a-population-based-cohort-study
#2
Herve Caspard, Robert P Wise, Amy Steffey, Robert S Brody
OBJECTIVES: To estimate the proportion of live-attenuated influenza vaccine (LAIV) doses administered beyond expiry date in children and adolescents during influenza seasons 2013-2014 and 2014-2015 in the UK. DESIGN: This was a retrospective cohort study. Two cohorts of children and adolescents who received LAIV from 1 September 2013 to 31 March 2014 and from 1 September 2014 to 31 March 2015 and aged 2-17 years at time of LAIV administration were identified from the Clinical Practice Research Datalink (CPRD)...
July 17, 2017: BMJ Open
https://www.readbyqxmd.com/read/28716781/incidence-and-trends-in-hypoglycemia-hospitalization-in-adults-with-type-1-and-type-2-diabetes-in-england-1998-2013-a-retrospective-cohort-study
#3
Victor W Zhong, Juhaeri Juhaeri, Stephen R Cole, Evangelos Kontopantelis, Christina M Shay, Penny Gordon-Larsen, Elizabeth J Mayer-Davis
OBJECTIVE: To determine trends in hospitalization for hypoglycemia in adults with type 1 diabetes mellitus (T1DM) and type 2 diabetes mellitus (T2DM) in England. RESEARCH DESIGN AND METHODS: Adults with T1DM or T2DM were identified from 398 of the 684 practices within the Clinical Practice Research Datalink, for which linkage to the Hospital Episode Statistics was possible. Hypoglycemia as primary reason for hospitalization between 1998 and 2013 was extracted. Trends were estimated using joinpoint regression models for adults with T1DM, young and middle-aged adults with T2DM (18-64 years), and elderly adults with T2DM (≥65 years), respectively...
July 17, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28715344/community-acquired-pneumonia-incidence-before-and-after-proton-pump-inhibitor-prescription-population-based-study
#4
Fatmah Othman, Colin J Crooks, Timothy R Card
Objective To examine the risk of community acquired pneumonia before and after prescription of proton pump inhibitor (PPI) and assess whether unmeasured confounding explains this association.Design Cohort study and self controlled case series.Setting Clinical Practice Research Datalink (1990 to 2013) in UK.Participants Adult patients with a new prescription for a PPI individually matched with controls.Main outcome measures Association of community acquired pneumonia with PPI prescription estimated by three methods: a multivariable Cox model comparing risk in PPI exposed patients with controls, corrected for potential confounders; a self controlled case series; and a prior event rate ratio (PERR) analysis over the 12 month periods before and after the first PPI prescription...
November 15, 2016: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28708856/diabetes-use-of-metformin-and-the-risk-of-meningioma
#5
Corinna Seliger, Christoph R Meier, Claudia Becker, Susan S Jick, Martin Proescholdt, Ulrich Bogdahn, Peter Hau, Michael F Leitzmann
BACKGROUND: Metformin is a commonly used oral antidiabetic agent that has been associated with decreased cancer risk. However, data regarding the association between metformin use and the risk of meningioma are unavailable. METHODS: We conducted a matched case-control analysis using data from the U.K.-based Clinical Practice Research Datalink (CPRD) to analyse diabetes status, duration of diabetes, glycemic control, and use of metformin, sulfonylureas, and insulin in relation to the risk of meningioma...
2017: PloS One
https://www.readbyqxmd.com/read/28695564/iron-supplementation-in-switzerland-a-bi-national-descriptive-and-observational-study
#6
Fabienne A Biétry, Balthasar Hug, Oliver Reich, Jick S Susan, Christoph Rudolf Meier
BACKGROUND: Iron deficiency is the most common nutritional disorder in the world, and it is the only common nutrient deficiency in industrialised nations. It is thought to be the most common cause of anaemia. Use of iron supplementation in Switzerland has not been previously quantified in detail. OBJECTIVES: We quantified use of iron supplementation from Swiss data and compared it with data from the UK. We assessed the frequency of serum ferritin and haemoglobin tests prior to newly started iron therapy to see whether use was based on documented low iron levels or blood parameters, especially in the case of parenteral iron supplementation...
July 11, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28692587/colorectal-cancer-and-markers-of-anemia
#7
Cornelia Schneider, Michael Bodmer, Susan S Jick, Christoph R Meier
Unexplained iron-deficiency anemia is an important marker for colorectal cancer (CRC). Our objectives were as follows: (a) to assess whether the association between anemia and CRC can be detected on the 'Clinical Practice Research Datalink', (b) to evaluate the timing between laboratory changes and CRC detection, and (c) to analyze its association with survival. We conducted a case-control study on patients with an incident CRC diagnosis during 2008-2012 and a 1 : 1-matched control group. We compared anemia markers serum ferritin (SF), hemoglobin (Hb), mean corpuscular volume (MCV), and red blood cell count between cases and controls using conditional logistic regression...
July 7, 2017: European Journal of Cancer Prevention
https://www.readbyqxmd.com/read/28692489/the-estimation-of-gestational-age-at-birth-in-database-studies
#8
Maria Eberg, Robert W Platt, Kristian B Filion
BACKGROUND: Studies on the safety of prenatal medication use require valid estimation of the pregnancy duration. However, gestational age is often incompletely recorded in administrative and clinical databases. Our objective was to compare different approaches to estimating the pregnancy duration. METHODS: Using data from the Clinical Practice Research Datalink and Hospital Episode Statistics, we examined four approaches to estimating missing gestational age: 1) generalized estimating equations for longitudinal data; 2) multiple imputation; 3) estimation based on fetal birth weight and sex; and 4) conventional approaches that assigned a fixed value (39 weeks for all or 39 weeks for full term and 35 weeks for preterm)...
July 7, 2017: Epidemiology
https://www.readbyqxmd.com/read/28684558/pattern-of-risks-of-systemic-lupus-erythematosus-among-statin-users-a-population-based-cohort-study
#9
Hilda J I De Jong, Tjeerd P van Staa, Arief Lalmohamed, Frank de Vries, Rob J Vandebriel, Henk Van Loveren, Olaf H Klungel, Jan Willem Cohen Tervaert
OBJECTIVES: To examine the association between the use of statins and the risk of systemic lupus erythematosus (SLE) with focus on describing the patterns of risks over time. SETTING: A population-based cohort study using the UK Clinical Practice Research Datalink. PARTICIPANTS: All patients aged 40 years or older who had at least one prescription of statins during the period 1995-2009 were selected and matched by age, sex, practice and date of first prescription to non-users...
July 6, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28683466/commonly-used-medications-and-endometrial-cancer-survival-a-population-based-cohort-study
#10
Omolara B Sanni, Úna C Mc Menamin, Chris R Cardwell, Linda Sharp, Liam J Murray, Helen G Coleman
BACKGROUND: Increasing incidence and new indications for existing drugs make it important to identify new adjuvant therapies for endometrial cancer (EC). METHODS: This is a prospective cohort study of 3058 newly diagnosed EC cases from 1998 to 2010, identified through record linkages between the UK Clinical Practice Research Datalink, the National Cancer Research Datalink and death registrations from the Office of National Statistics. Using Cox regression models, unadjusted and adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated for EC-specific survival...
July 6, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28679541/alcohol-consumption-and-all-cause-mortality-an-analysis-of-general-practice-database-records-for-patients-with-long-term-conditions
#11
Duncan Stewart, Lu Han, Tim Doran, Jim McCambridge
BACKGROUND: Alcohol is a risk factor for ill health and reduced life expectancy, but little is known about the impact of alcohol on mortality for people with existing long-term conditions. We used primary care data from the Clinical Practice Research Datalink (CPRD) to study relationships between alcohol consumption and all-cause mortality among general practice patients with long-term conditions. METHODS: Data were accessed from a sample of 125 general practices from the CPRD database...
July 5, 2017: Journal of Epidemiology and Community Health
https://www.readbyqxmd.com/read/28670142/prevalence-of-hypercalcemia-of-malignancy-among-pediatric-cancer-patients-in-the-uk-clinical-practice-research-datalink-database
#12
Susan Jick, Lin Li, Victor M Gastanaga, Alexander Liede, Rohini K Hernandez
BACKGROUND: The reported proportion of cancer patients who experience hypercalcemia of malignancy (HCM) is low, particularly in the pediatric population, ranging between <1% and 5%. HCM can be observed with any type of tumor in children and occurs most commonly with leukemia. While HCM is a potentially fatal condition, the prevalence of HCM is not well understood in pediatric cancer patients. METHODS: Using the UK Clinical Practice Research Datalink, we identified pediatric cancer patients with recorded corrected serum calcium (CSC) from 2003 through 2014...
2017: Clinical Epidemiology
https://www.readbyqxmd.com/read/28663549/determinants-of-initial-inhaled-corticosteroid-use-in-patients-with-gold-a-b-copd-a-retrospective-study-of-uk-general-practice
#13
James D Chalmers, Abigail Tebboth, Alicia Gayle, Andrew Ternouth, Nick Ramscar
Initial use of inhaled corticosteroid therapy is common in patients with Global Initiative for Chronic Obstructive Lung Disease (GOLD) A or B chronic obstructive pulmonary disease, contrary to GOLD guidelines. We investigated UK prescribing of inhaled corticosteroid therapy in these patients, to identify predictors of inhaled corticosteroid use in newly diagnosed chronic obstructive pulmonary disease patients. A cohort of newly diagnosed GOLD A/B chronic obstructive pulmonary disease patients was identified from the UK Clinical Practice Research Datalink (June 2005-June 2015)...
June 29, 2017: NPJ Primary Care Respiratory Medicine
https://www.readbyqxmd.com/read/28663349/a-nationwide-cohort-study-of-slipped-capital-femoral-epiphysis
#14
Daniel C Perry, David Metcalfe, Matthew L Costa, Tjeerd Van Staa
OBJECTIVES: To describe the epidemiology of slipped capital femoral epiphysis (SCFE), to examine associations with childhood obesity and socioeconomic deprivation, and to explore factors associated with diagnostic delays. DESIGN: Historic cohort study using linked primary and secondary care data from the Clinical Practice Research Datalink and Hospital Episode Statistics. SETTING: All contacts with healthcare services, including emergency presentations, outpatient appointments, inpatient admissions and primary care visits, within the UK National Health Service...
June 29, 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28656132/cost-effectiveness-of-antibiotics-for-copd-management-observational-analysis-using-cprd-data
#15
Sarah J Ronaldson, Anan Raghunath, David J Torgerson, Tjeerd Van Staa
It is often difficult to determine the cause of chronic obstructive pulmonary disease (COPD) exacerbations, and antibiotics are frequently prescribed. This study conducted an observational cost-effectiveness analysis of prescribing antibiotics for exacerbations of COPD based on routinely collected data from patient electronic health records. A cohort of 45 375 patients aged 40 years or more who attended their general practice for a COPD exacerbation during 2000-2013 was identified from the Clinical Practice Research Datalink...
April 2017: ERJ Open Research
https://www.readbyqxmd.com/read/28652719/validity-and-interpretation-of-spirometric-recordings-to-diagnose-copd-in-uk-primary-care
#16
Kieran J Rothnie, Joht S Chandan, Harry G Goss, Hana Müllerová, Jennifer K Quint
BACKGROUND: The diagnosis of COPD is dependent upon clinical judgment and confirmation of the presence of airflow obstruction using spirometry. Spirometry is now routinely available; however, spirometry incorrectly performed or interpreted can lead to misdiagnosis. We aimed to determine whether spirometry undertaken in primary care for patients suspected to have COPD was of sufficient quality and whether their spirometry was correctly interpreted. METHODS: Two chest physicians re-read all spirometric readings for both quality of the procedure and interpretation, received as a part of COPD validation studies using data from the Clinical Practice Research Datalink (CPRD)...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28635339/methods-for-estimating-costs-in-patients-with-hyperlipidemia-experiencing-their-first-cardiovascular-event-in-the-united-kingdom
#17
Mark D Danese, Michelle Gleeson, Robert I Griffiths, David Catterick, Lucie Kutikova
AIMS: Methods for integrating external costs into clinical databases are not well-characterized. The purpose of this research was to describe and implement methods for estimating the cost of hospitalizations, prescriptions, and general practitioner and specialist visits used to manage hyperlipidemia patients experiencing cardiovascular (CV) events in the United Kingdom (UK). METHODS: This study was a retrospective cohort study using the Clinical Practice Research Datalink and Hospital Episode Statistics data...
June 21, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/28633374/cohort-study-of-preoperative-blood-pressure-and-risk-of-30-day-mortality-after-elective-non-cardiac-surgery
#18
S Venkatesan, P R Myles, H J Manning, A M Mozid, C Andersson, M E Jørgensen, J G Hardman, S R Moonesinghe, P Foex, M Mythen, M P W Grocott, R D Sanders
Background: Preoperative blood pressure (BP) thresholds associated with increased postoperative mortality remain unclear. We investigated the relationship between preoperative BP and 30-day mortality after elective non-cardiac surgery. Methods: We performed a cohort study of primary care data from the UK Clinical Practice Research Datalink (2004-13). Parsimonious and fully adjusted multivariable logistic regression models, including restricted cubic splines for numerical systolic and diastolic BP, for 30-day mortality were constructed...
June 15, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28614231/incidence-prevalence-and-natural-history-of-primary-sclerosing-cholangitis-in-the-united-kingdom
#19
Huifang Liang, Sudhakar Manne, Jesse Shick, Trevor Lissoos, Paul Dolin
Primary sclerosing cholangitis (PSC) is a rare obliterative fibrotic condition of the bile ducts. We assessed PSC epidemiology and natural history within the UK Clinical Practice Research Datalink (CPRD).Incidence and natural history of PSC were evaluated in a retrospective cohort study using linkage of CPRD, Hospital Episode Statistics, and Office for National Statistics data. Data from age, sex, and general practice-matched population controls provided a context for the incident PSC patients. Liver disease other than PSC was defined as autoimmune hepatitis, hepatitis, hepatomegaly, liver failure, cirrhosis, portal hypertension, cholangiocarcinoma, or hepatobiliary cancer...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28608143/resource-utilization-among-glaucoma-patients-in-the-uk-treated-with-beta-blocker-and-non-beta-blocker-adjunctive-therapy-a-retrospective-cohort-analysis
#20
Ananth Viswanathan, Claudio Spera, Anmol Mullins, David Covert, Judit Banhazi, Paul McDwyer, Eibhlin Hudson, Alberto Ferreira
INTRODUCTION: Few studies have examined outcomes and potential complications among glaucoma patients who are prescribed topical beta-blockers. This study examined resource usage (number of GP visits and hospitalizations) and diagnoses of respiratory or cardiovascular conditions among glaucoma patients prescribed beta-blockers compared to patients not prescribed beta-blockers. METHODS: A retrospective cohort analysis was conducted using data from the UK Clinical Practice Research Datalink (CPRD) database over the period January 1, 2006 to March 31, 2014...
May 30, 2017: Advances in Therapy
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