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Pharmacoepidemiology

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https://www.readbyqxmd.com/read/28497594/the-impact-of-regulatory-action-on-the-co-prescribing-of-renin-angiotensin-system-blockers-in-uk-primary-care
#1
Craig Allen, Katherine Donegan
PURPOSE: The aim of this study was to assess the impact of regulatory action taken in June 2014 on the co-prescribing of renin-angiotensin system (RAS) blockers in UK primary care. METHODS: RAS blocker prescriptions, issued between 01/01/2009-30/06/2015, were extracted from the Clinical Practice Research Datalink to estimate the quarterly prevalence (number of patients with at least one co-prescription) and incidence (number of patients first receiving a RAS blocker co-prescription) of co-prescribing...
May 11, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28495861/testosterone-treatment-and-cardiovascular-and-venous-thromboembolism-risk-what-is-new
#2
G Corona, M Dicuio, G Rastrelli, E Maseroli, F Lotti, A Sforza, M Maggi
In men, testosterone (T) production declines as a function of ageing. Late-onset hypogonadism (LOH) is the most commonly used term to indicate this age-related condition. In LOH, the relative clinical significance and the potential benefit of testosterone treatment (TTh) are still the subject of strong criticisms in the scientific community. The debate is further complicated by the recent position statement of the US Food and Drug Administration (FDA) emphasizing that, in LOH, the benefits and safety of TTh have not been fully established...
May 10, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/28490702/-status-for-self-medication-based-on-bibliometric-study-in-china
#3
Zhuqing Zhong, Zhiying Shen, Siqing Ding, Feng Zheng, Yinglong Duan, Aijing Luo
To figure out problems through analyzing the status for self-medication in China and to provide references for further research.
 Methods: Papers related to self-medication were collected from Chinese journal net database, Wanfang database, VIP database and China biomedical literature database (CBMDisc). A literature metrology analysis was carried out by NoteExpress 2.0 and Excel.
 Results: A total of 161 papers were included in this study, while 33 papers belong to Hubei and Jiangsu Province, accounting for 20...
April 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28490262/methods-for-safety-signal-detection-in-healthcare-databases-a-literature-review
#4
Mickael Arnaud, Bernard Bégaud, Nicolas Thurin, Nicholas Moore, Antoine Pariente, Francesco Salvo
With increasing availability, the use of healthcare databases as complementary data source for drug safety signal detection has been explored to circumvent the limitations inherent in spontaneous reporting. Areas covered: To review the methods proposed for safety signal detection in healthcare databases and their performance. Expert opinion: Fifteen different data mining methods were identified. They are based on disproportionality analysis, traditional pharmacoepidemiological designs (e.g. self-controlled designs), sequence symmetry analysis (SSA), sequential statistical testing, temporal association rules, supervised machine learning (SML), and the tree-based scan statistic...
May 11, 2017: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/28489008/-do-opioids-sedatives-and-proton-pump-inhibitors-increase-the-risk-of-fractures
#5
Gudlaug Thorsdottir, Elisabet Benedikz, Sigridur A Thorgeirsdottir, Magnus Johannsson
INTRODUCTION: A pharmacoepidemiological study was conducted to analyse the relationship between bone fracture and the use of certain drugs. MATERIAL/METHODS: The study includes patients 40 years and older, diagnosed with bone fractures in the Emergency Department of Landspitali University Hospital in Reykjavik, Iceland, during a 10-year period (2002-2011). Also were included those who picked up from a pharmacy 90 DDD or more per year of the drugs included in the study in the capital region of Iceland during same period...
May 2017: Læknablađiđ
https://www.readbyqxmd.com/read/28474439/estimating-medication-stopping-fraction-and-real-time-prevalence-of-drug-use-in-pharmaco-epidemiologic-databases-an-application-of-the-reverse-waiting-time-distribution
#6
Henrik Støvring, Anton Pottegård, Jesper Hallas
PURPOSE: To introduce the reverse waiting time distribution (WTD) and show how it can be used to estimate stopping fractions and real-time prevalence of treatment in pharmacoepidemiological studies. METHODS: The reverse WTD is the distribution of time from the last dispensed prescription of each patient within a time window to the end of it. It is a mirrored version of the ordinary WTD, which considers the first dispensed prescription of patients within a time window...
May 4, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28468629/a-methodological-protocol-for-selecting-and-quantifying-low-value-prescribing-practices-in-routinely-collected-data-an-australian-case-study
#7
Jonathan Brett, Adam G Elshaug, R Sacha Bhatia, Kelsey Chalmers, Tim Badgery-Parker, Sallie-Anne Pearson
BACKGROUND: Growing imperatives for safety, quality and responsible resource allocation have prompted renewed efforts to identify and quantify harmful or wasteful (low-value) medical practices such as test ordering, procedures and prescribing. Quantifying these practices at a population level using routinely collected health data allows us to understand the scale of low-value medical practices, measure practice change following specific interventions and prioritise policy decisions. To date, almost all research examining health care through the low-value lens has focused on medical services (tests and procedures) rather than on prescribing...
May 3, 2017: Implementation Science: IS
https://www.readbyqxmd.com/read/28466973/refining-estimates-of-prescription-durations-by-using-observed-covariates-in-pharmacoepidemiological-databases-an-application-of-the-reverse-waiting-time-distribution
#8
Henrik Støvring, Anton Pottegård, Jesper Hallas
PURPOSE: The study aimed to develop an automated method to estimate prescription durations in pharmacoepidemiological studies that may depend on patient and redemption characteristics. METHODS: We developed an estimation algorithm based on maximum likelihood estimation for the reverse waiting time distribution (WTD), which is the distribution of time from the last prescription of each patient within a time window to the end of the time window. The reverse WTD consists of two distinctly different components: one component for prevalent users and one for patients stopping treatment...
May 3, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28455114/association-of-fasting-serum-insulin-and-cancer-mortality-in-a-healthy-population-28-year-follow-up-of-the-french-telecom-study
#9
M Wargny, B Balkau, C Lange, M-A Charles, P Giral, D Simon
AIMS: Epidemiologic, pharmacoepidemiologic and pathophysiologic evidence points consistently to an association between type 2 diabetes and cancer. This association could be explained by hyperinsulinemia induced by insulin resistance. We studied the association between fasting serum insulin (FSI) and cancer mortality in a population of non-diabetic individuals. METHODS: We followed 3117 healthy workers (50.2% women), included in the TELECOM cohort study, between 1985 and 1987; their median age was 38 years (Q1-Q3=30-50)...
April 25, 2017: Diabetes & Metabolism
https://www.readbyqxmd.com/read/28446159/the-quality-of-medicaid-and-medicare-data-obtained-from-cms-and-its-contractors-implications-for-pharmacoepidemiology
#10
Charles E Leonard, Colleen M Brensinger, Young Hee Nam, Warren B Bilker, Geralyn M Barosso, Margaret J Mangaali, Sean Hennessy
BACKGROUND: Administrative claims of United States Centers for Medicare and Medicaid Services (CMS) beneficiaries have long been used in non-experimental research. While CMS performs in-house checks of these claims, little is known of their quality for conducting pharmacoepidemiologic research. We performed exploratory analyses of the quality of Medicaid and Medicare data obtained from CMS and its contractors. METHODS: Our study population consisted of Medicaid beneficiaries (with and without dual coverage by Medicare) from California, Florida, New York, Ohio, and Pennsylvania...
April 26, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28444196/fluoroquinolone-use-and-risk-of-carpal-tunnel-syndrome-a-pharmacoepidemiologic-study
#11
Jasmine Z Cheng, Mohit Sodhi, Mahyar Etminan, Bruce C Carleton
Fluoroquinolone (FQ) induced peripheral neuropathies and tendinopathies are well documented, but there are no epidemiologic studies on the risk of carpel tunnel syndrome (CTS). We conducted a case-control study of over 6 million patients. FQ use is associated with increased risk of CTS (RR = 1.34, 95% CI 1.31 - 1.37).
April 24, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28429612/a-unique-database-for-gathering-data-from-a-mobile-app-and-medical-prescription-software-a-useful-data-source-to-collect-and-analyse-patient-reported-outcomes-of-depression-and-anxiety-symptoms
#12
Yoshinori Watanabe, Yoko Hirano, Yuko Asami, Maki Okada, Kazuya Fujita
A unique database named 'AN-SAPO' was developed by Iwato Corp. and Japan Brain Corp. in collaboration with the psychiatric clinics run by Himorogi Group in Japan. The AN-SAPO database includes patients' depression/anxiety score data from a mobile app named AN-SAPO and medical records from medical prescription software named 'ORCA'. On the mobile app, depression/anxiety severity can be evaluated by answering 20 brief questions and the scores are transferred to the AN-SAPO database together with the patients' medical records on ORCA...
April 21, 2017: International Journal of Psychiatry in Clinical Practice
https://www.readbyqxmd.com/read/28417321/adjuvanted-as03-a-h1n1-2009-pandemic-influenza-vaccines-and-solid-organ-transplant-rejection-systematic-signal-evaluation-and-lessons-learnt
#13
Gaël Dos Santos, Harry A Seifert, Vincent Bauchau, Vivek Shinde, Dominique M Barbeau, Catherine Cohet
INTRODUCTION: We investigated a signal of solid organ transplant (SOT) rejection after immunisation with (AS03) A/H1N1 2009 pandemic influenza vaccines. METHODS: Potential immunological mechanisms were reviewed and quantitative analyses were conducted. The feasibility of pharmacoepidemiological studies was explored. RESULTS: Overall results, including data from a pharmacoepidemiological study, support the safety of adjuvanted (AS03) pandemic influenza vaccination in SOT recipients...
April 17, 2017: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/28399565/conducting-privacy-preserving-multivariable-propensity-score-analysis-when-patient-covariate-information-is-stored-in-separate-locations
#14
Justin Bohn, Wesley Eddings, Sebastian Schneeweiss
Distributed networks of health-care data sources are increasingly being utilized to conduct pharmacoepidemiologic database studies. Such networks may contain data that are not physically pooled but instead are distributed horizontally (separate patients within each data source) or vertically (separate measures within each data source) in order to preserve patient privacy. While multivariable methods for the analysis of horizontally distributed data are frequently employed, few practical approaches have been put forth to deal with vertically distributed health-care databases...
March 15, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28398706/can-we-rely-on-pharmacy-claims-databases-to-ascertain-maternal-use-of-medications-during-pregnancy
#15
Jin-Ping Zhao, Odile Sheehy, Jessica Gorgui, Anick Bérard
BACKGROUND: Administrative databases are increasingly used to measure drug exposure in perinatal pharmacoepidemiology. We aimed to estimate the concordance between records of prescriptions filled in pharmacies and self-reported drug use during pregnancy. METHODS: Data on self-reported medication use were collected at each trimester of pregnancy among a sub-sample from the Organization of Teratology Information Specialists Antidepressants in Pregnancy Cohort. Women were eligible if they were Quebec resident and provided their pharmacist's contact information...
April 3, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28398582/how-to-compare-instrumental-variable-and-conventional-regression-analyses-using-negative-controls-and-bias-plots
#16
Neil M Davies, Kyla H Thomas, Amy E Taylor, Gemma M J Taylor, Richard M Martin, Marcus R Munafò, Frank Windmeijer
There is increasing interest in the use of instrumental variable analysis to overcome unmeasured confounding in observational pharmacoepidemiological studies. This is partly because instrumental variable analyses are potentially less biased than conventional regression analyses. However, instrumental variable analyses are less precise, and regulators and clinicians find it difficult to interpret conflicting evidence from instrumental variable compared with conventional regression analyses. In this paper, we describe three techniques to assess which approach (instrumental variable versus conventional regression analyses) is least biased...
April 7, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/28397412/prevalence-incidence-indication-and-choice-of-antidepressants-in-patients-with-and-without-chronic-kidney-disease-a-matched-cohort-study-in-uk-clinical-practice-research-datalink
#17
Masao Iwagami, Laurie A Tomlinson, Kathryn E Mansfield, Helen I McDonald, Liam Smeeth, Dorothea Nitsch
PURPOSE: People with chronic kidney disease (CKD) have an increased prevalence of depression, anxiety, and neuropathic pain. We examined prevalence, incidence, indication for, and choice of antidepressants among patients with and without CKD. METHODS: Using the UK Clinical Practice Research Datalink, we identified patients with CKD (two measurements of estimated glomerular filtration rate < 60 mL/min/1.73m(2) for ≥3 months) between April 2004 and March 2014...
April 11, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28397352/effects-of-expanding-the-look-back-period-to-all-available-data-in-the-assessment-of-covariates
#18
Sonja S Nakasian, Jeremy A Rassen, Jessica M Franklin
BACKGROUND: A fixed baseline period has been a common covariate assessment approach in pharmacoepidemiological studies from claims but may lead to high levels of covariate misclassification. Simulation studies have recommended expanding the look-back approach to all available data (AAD) for binary indicators of diagnoses, procedures, and medications, but there have been few real data analyses using this approach. OBJECTIVE: The objective of the study is to explore the impact on treatment effect estimates and covariate prevalence of expanding the look-back period within five validated studies in the Aetion system, a rapid cycle analytics platform...
April 11, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28397317/evaluating-the-effectiveness-of-risk-minimisation-measures-the-application-of-a-conceptual-framework-to-danish-real-world-dabigatran-data
#19
REVIEW
Martin Erik Nyeland, Mona Vestergaard Laursen, Torbjörn Callréus
PURPOSE: For both marketing authorization holders and regulatory authorities, evaluating the effectiveness of risk minimization measures is now an integral part of pharmacovigilance in the European Union. The overall aim of activities in this area is to assess the performance of risk minimization measures implemented in order to ensure a positive benefit-risk balance in patients treated with a medicinal product. METHODS: Following a review of the relevant literature, we developed a conceptual framework consisting of four domains (data, knowledge, behaviour and outcomes) intended for the evaluation of risk minimization measures put into practice in the Danish health-care system...
April 11, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28392715/positive-predictive-values-of-international-classification-of-diseases-10th-revision-codes-for-dermatologic-events-and-hypersensitivity-leading-to-hospitalization-or-emergency-room-visit-among-women-with-postmenopausal-osteoporosis-in-the-danish-and-swedish
#20
Kasper Adelborg, Lotte Brix Christensen, Troels Munch, Johnny Kahlert, Ylva Trolle Lagerros, Grethe S Tell, Ellen M Apalset, Fei Xue, Vera Ehrenstein
BACKGROUND: Clinical epidemiology research studies, including pharmacoepidemiology and pharmacovigilance studies, use routinely collected health data, such as diagnoses recorded in national health and administrative registries, to assess clinical effectiveness and safety of treatments. We estimated positive predictive values (PPVs) of International Classification of Diseases, 10th revision (ICD-10) codes for primary diagnoses of dermatologic events and hypersensitivity recorded at hospitalization or emergency room visit in the national patient registries of Denmark and Sweden among women with postmenopausal osteoporosis (PMO)...
2017: Clinical Epidemiology
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