1,721,023 research outputs found
The possible role of estrogens and progestagens in the prevention of osteoporosis
No full textThe multifactorial disease of osteoporosis is one of the most frequent diseases, affecting about 5 - 6 Mio. postmenopausal women in Germany, today. In spite of the introduction of new technologies of fracture risk assessment and new pharmacological opportunities the incidence of fracture is still increasing. Therefore, early identification of women at high risk as well as early and individualised preventive measures are essential in the prevention of osteoporosis. Changes of dietary habits as well as lifestyle including an increase in physical activity are of up most importance. In addition to Calcium and Vitamin D supplementation, hormone replacement therapy (HRT) is accepted as the first line and cost effective pharmacological treatment for the prevention of osteoporosis. Numerous cross sectional, case-control and prospective studies showing the effect of HRT on bone reabsorption and bone mineral density (BMD) have been published. HRT reduces bone turnover which is followed by an increase of BMD. A number of case-control and cohort studies as well as a few recent prospective studies have been investigating the effect of HRT on osteoporosis related fracture. These studies confirm that HRT leads to a significant decrease of osteoporosis related fracture (Hip fracture by > 25 %). However, randomised, prospective studies are needed to underline the effect on osteoporosis related fracture. Although the effect of HRT on BMD is independent of both, the age at which treatment is started and the route of administration, a dose-response relation as well as a greater response in patients with a lower initial BMD has been reported. Since bone is lost rapidly when treatment is stopped, the duration of treatment is clinically important in evaluating the effect of HRT on BMD. Hereby, a duration of 10 years and more seems desirable. Since the ongoing controversial discussion on the duration dependent increase of the incidence of breast cancer and the discussion on secondary prevention of cardiovascular disease, any therapy decision must be individually evaluated. The following article gives a systematical review on the recent literature regarding the influence of HRT on BMD and osteoporosis related fracture
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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
Full text linkWe 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
Is postmenopausal hormone replacement therapy suitable after a cardio- or cerebrovascular event?
Full text linkPURPOSE
Vascular disease is the leading cause of death in women. One-third of acute events affect women below age 60, when the prevalence of menopausal symptoms is high. This raises the question if hormone replacement therapy (HRT) may be an appropriate treatment for individual women although vascular disease is generally considered a contraindication.
METHODS
Selective literature search was used for this study.
RESULTS
In healthy women, HRT increases risks for venous thromboembolism and ischemic stroke, but for cardiovascular disease apparently only beyond 10 years after menopause or 60 years of age. Limited data in women with cardio or cerebrovascular disease have not demonstrated an increased risk for a vascular recurrent event, but for the first year after initiation. In HRT users affected by a cardiovascular event continuation of HRT has not been found to be associated with adverse outcome. Low dose estradiol--preferentially as transdermal patches, if necessary combined with metabolically neutral progestins--appears to convey lower risk.
CONCLUSIONS
Safety data on HRT in survivors of cardiovascular events or ischemic stroke are limited, but exceptionally increased risk appears to be excluded. If off-label use of HRT is considered to be initiated or continued in women with cardio- or cerebrovascular disease, extensive counseling on the pros and cons of HRT is mandatory
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
Interventions to reduce the risk of ovarian and fallopian tube cancer : a European Menopause and Andropause Society position statement
Full text linkOvarian cancer is a leading cause of female gynecological cancer-related death, and there are no effective screening procedures or early diagnostic approaches
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
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