1,721,016 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Medication Adherence Outcomes in Elderly Patients with Hypertension and Chronic Kidney Disease: a Geographical Approach
Get PDFOBJECTIVES Chronic kidney disease (CKD) patients with uncontrolled blood pressure are at high risk of cardiovascular events, hospitalization, and mortality. There is limited research evaluating utilization patterns of anti-hypertensives in hypertensive CKD patients. This study aims to assess anti-hypertensives use, particularly, angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin-receptor blockers (ARBs) in the United States, and explore contextual and individual risk factors of treatment compliance.
METHODS Hypertensive CKD patients were selected using Medicare 5% sample claims data from the United States Renal Data System (USRDS) databases (2006-2013). We included patients who diagnosed with hypertension and CKD, and followed them from Jan 1, 2008 to Dec 31, 2013. We first investigated medication treatment patterns among incident CKD patients. We then performed time-dependent survival analyses to evaluate long-term benefits of being adherence to ACEIs/ARBs. Medication adherence in this study was measured by proportion days covered (PDC). Lastly, we used geographically weighted regression model (GWR) to explore risk factors of medication adherence.
RESULTS Approximately 50% of incident hypertensive CKD patients received guideline-recommended ACEIs/ARBs after their first diagnosis of CKD. Anti-hypertensive regimens including ACEIs/ARBs and statins yielded better CKD outcomes than regimens without these drugs. Additionally, continuously being adherent to ACEIs and ARBs was associated a significant decline in risk of end-stage renal disease (ESRD) and mortality in long run. However, only 61% of hypertensive CKD who used ACEIs/ARBs had good medication compliance (PDC ≥80%). Patients residing in the Northeast region and the Midwest region demonstrated better adherence than those residing in the Southern United States. Availability of primary resources, neighborhood deprivation status, and coverage of Part D Low-income Subsidy (LIS) were factors related with medication adherence. Geographically varied association between contextual characteristics and adherence were displayed by maps.
CONCLUSIONS Utilization of guideline-recommended ACEIs/ARBs is suboptimal in elderly patients with hypertension and CKD in the United States, although they had significant long-term benefits on CKD outcomes. Adherence to ACEIs/ARBs is geographically differentiated across the United States. Contextual and individuals risk factors identified in this study are helpful to design population-based strategies in a local area to promote medication compliance, from a population perspective.PhDSocial and Administrative SciencesUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttps://deepblue.lib.umich.edu/bitstream/2027.42/137046/1/hanyun_1.pd
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Innovations in Pharmacological Treatment of Major Depressive Disorder and Associated Patient Outcomes.
Get PDFThe overarching topic of this research was to study the adoption and utilization of innovative antidepressants and its associations with patient labor market and health outcomes. The differences in adoption across patient and physician characteristics, geographic regions, insurance status, and other related factors in the United States needed further research. The adoption of SSRIs/SNRIs is characterized by the prescription volume and reflected in physician’s adherence to practice guidelines and patient’s adherence to medications. Therefore, the objective of this research was to try to understand the pattern of prescribing and use of SSRI/SNRI medications for patients with major depressive disorder (MDD) and the process of its adoption, and patients adherence to these medications. In addition, patient outcomes such as employment duration and quality of life associated with the use of SSRI/SNRI antidepressants were studied.
This research used the 1993-2007 National Ambulatory Medical Care Survey (NAMCS) and the 2000-2007 Medical Expenditure Panel Survey (MEPS), two national surveys, to explore these research objectives. A two-stage Heckman selection model along with multinomial logistic regression models were used to capture the two-stage nature of SSRI/SNRI prescription and use. In addition, linear regression and two-part models were used to examine MDD patient’s medication adherence and associated health care expenditures. Finally, proportional hazard models were implemented to explore antidepressant use and patient’s labor market participation, and linear regression models were used to examine associated patient quality of life.
We observed an association between sociological factors and physician’s innovative antidepressant prescribing patterns. Differences in antidepressant adherence and health care spending across patient factors were revealed. In addition, patient health status and quality of life varied across patient factors, in which patient utilization of innovative antidepressants were found to have positive associations with patient mental health status.
Differences in antidepressant adherence and health care spending across patient factors could have important policy implications for drug formularies and reduction of health disparities. Effective policy interventions are needed for improving medication adherence and accommodating patient factors. Tailoring drug formularies and prescription drug benefit design within health insurance, and adjusting patient payment schemes for antidepressants are strongly suggested based on this research.PhDHealth Services Organization and Policy and Social and AdmUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/77819/1/hsclin_1.pd
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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