1,720,992 research outputs found
Glutamine in critical care:current evidence from systematic reviews
Get PDFGlutamine, the most abundant amino acid in the body, is thought to become conditionally essential in critical illness. Some of the important roles for glutamine are as a carrier for inter-organ N, a preferred fuel for enterocytes and cells of the immune system, a substrate for renal NH3 formation and a precursor for glutathione. Mechanisms by which glutamine could improve recovery include attenuating oxidant damage and inflammatory cytokine production, reducing gut bacterial translocation and improving N balance. The present systematic review has found trends to suggest that parenteral and enteral glutamine supplementation reduce mortality, the development of infection and organ failure in critical illness. Trials of parenteral nutrition containing glutamine with patients after elective surgery also suggest reduction of infection, but it is unlikely that glutamine-containing parenteral nutrition would be used for such patients. The evidence base is limited by the quality of the reported trials and the suggestion that there is publication bias, with trials suggesting reduced infection being more likely to be published
Using Logistic Regression to Describe the Length of Breastfeeding: A Study in Guadalajara, Mexico
No full textThis study seeks, through a logistic regression model, to describe the pattern of breastfeeding duration in Guadalajara, Mexico, during 1993. A multistage random sample of children under 1 year of age (n=1036) was studied; observational data regarding breastfeeding duration, obtained through a "status quo" procedure, were compared with prevalence rates obtained from the logistic regression model. Modeling the duration of breastfeeding during the first year of life rather than only analyzing observational data helps researchers to understand this process in a dynamic and quantitative way. For example, uncommon indicators of breastfeeding were derived from the model. These indicators are impossible to obtain from observational data. The prevalence curve estimated through the logistic model was adequately fitted to observed data: there were no significant differences between the number or distribution of breastfed infants observed and those predicted by the model. Moreover, the model revealed that less than 40% of the children were breastfed in the fourth month of life; the median age for weaning was 39.3 days; 55% of the potential breastfeeding in the first 4 months did not occur; and the greatest abandonment of breastfeeding in the first 4 months was observed in the first 60 days. Thus, logistic regression seems a suitable option to construct a population-based model that describes breastfeeding duration during the first year of life. The indicators derived from the model offer health care providers valuable information for developing programs that promote breastfeeding
Using Logistic Regression to Describe the Length of Breastfeeding: A Study in Guadalajara, Mexico
No full textThis study seeks, through a logistic regression model, to describe the pattern of breastfeeding duration in Guadalajara, Mexico, during 1993. A multistage random sample of children under 1 year of age (n=1036) was studied; observational data regarding breastfeeding duration, obtained through a "status quo" procedure, were compared with prevalence rates obtained from the logistic regression model. Modeling the duration of breastfeeding during the first year of life rather than only analyzing observational data helps researchers to understand this process in a dynamic and quantitative way. For example, uncommon indicators of breastfeeding were derived from the model. These indicators are impossible to obtain from observational data. The prevalence curve estimated through the logistic model was adequately fitted to observed data: there were no significant differences between the number or distribution of breastfed infants observed and those predicted by the model. Moreover, the model revealed that less than 40% of the children were breastfed in the fourth month of life; the median age for weaning was 39.3 days; 55% of the potential breastfeeding in the first 4 months did not occur; and the greatest abandonment of breastfeeding in the first 4 months was observed in the first 60 days. Thus, logistic regression seems a suitable option to construct a population-based model that describes breastfeeding duration during the first year of life. The indicators derived from the model offer health care providers valuable information for developing programs that promote breastfeeding
[Knowledge, attitudes and dietary practices in patients with diabetes mellitus type II]
No full textThe profile of type-II non-insulin dependent diabetic patients is characterized by overweight; exogenous obesity originates from inadequate nourishment habits and, among other things, educational, cultural, and psychological conditions. With regard to metabolic deficiency control, the explanation is centered fundamentally on the patient's not getting a complete diet. This could be due to a lack of information about their illness, thus becoming a determining factor in their treatment. The purpose of this study was to analyze the level of knowledge, attitudes, and dietary education practices by means of a survey using the likert scale. This was applied by means of a direct and codified interview directed to patients in a Primary Care Health Unit from the Mexican Social Security Institute (IMSS) in Guadalajara, Jalisco, Mexico. 201 Type II diabetic patients, selected from a systematic sample, were studied. The average age was 54 and predominantly female (a ratio of 1.7 to 1). The sample had an academic background not surpassing the elementary school level, and their occupation was that of housewife. Their central glycemia level was, on the average, 191 mg/dl with a standard deviation of 120. The average number of years of having suffered from the illness was 5.5 with a standard deviation of 5. Ninety per cent of the diabetic patients take oral hypoglucemiants. Although there does exist a high level of knowledge and attitudes about dietary education, there exists a low level of educational practices. We observed that only 10 per cent of the diabetic patients have both an acceptable metabolic control (CMA) and a high value in knowledge, attitudes, and practices (CAP).(ABSTRACT TRUNCATED AT 250 WORDS
[Knowledge, attitudes and dietary practices in patients with diabetes mellitus type II]
No full textThe profile of type-II non-insulin dependent diabetic patients is characterized by overweight; exogenous obesity originates from inadequate nourishment habits and, among other things, educational, cultural, and psychological conditions. With regard to metabolic deficiency control, the explanation is centered fundamentally on the patient's not getting a complete diet. This could be due to a lack of information about their illness, thus becoming a determining factor in their treatment. The purpose of this study was to analyze the level of knowledge, attitudes, and dietary education practices by means of a survey using the likert scale. This was applied by means of a direct and codified interview directed to patients in a Primary Care Health Unit from the Mexican Social Security Institute (IMSS) in Guadalajara, Jalisco, Mexico. 201 Type II diabetic patients, selected from a systematic sample, were studied. The average age was 54 and predominantly female (a ratio of 1.7 to 1). The sample had an academic background not surpassing the elementary school level, and their occupation was that of housewife. Their central glycemia level was, on the average, 191 mg/dl with a standard deviation of 120. The average number of years of having suffered from the illness was 5.5 with a standard deviation of 5. Ninety per cent of the diabetic patients take oral hypoglucemiants. Although there does exist a high level of knowledge and attitudes about dietary education, there exists a low level of educational practices. We observed that only 10 per cent of the diabetic patients have both an acceptable metabolic control (CMA) and a high value in knowledge, attitudes, and practices (CAP).(ABSTRACT TRUNCATED AT 250 WORDS
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
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
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
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