1,720,997 research outputs found
Prevalence and socio-structural determinants of tobacco exposure in young women: Data from the Healthy Trajectories Initiative (HeLTI) study in urban Soweto, South Africa
No full textBackground:Tobacco use is a major public health risk worldwide, which has increased on the African continent over the past 40 years. Socio-economic factors impact tobacco use and exposure, but little is known about the scope of this problem in young women living in an urban, historically disadvantaged township in contemporary South Africa. This study aimed to identify the prevalence of tobacco use in a cohort of young South African women using serum cotinine, and to assess the association between a number of socio-economic and social factors and tobacco use in this setting.MethodsSecondary analysis was conducted on cross-sectional data from the Healthy Life Trajectories Initiative (HeLTI) study. Serum cotinine was measured and a cut-off of ≥ 10 ng/mL was classified as tobacco use. Household socio-economic, socio-demographic and health information were collected by an interviewer-administered questionnaire.ResultsCotinine data was available for 1508 participants, of whom 29.2% (n = 441) had cotinine levels indicative of tobacco use. In regression analyses, moderate to severe socio-economic vulnerability (score 2–3 OR 1.66, p = 0.008; score ≥4: OR 1.63, p = 0.026) and multiparity (OR 1.74, p = 0.013) were associated with tobacco use. In addition, alcohol dependence (OR 3.07, p < 0.001) and drug use (OR 4.84, p < 0.001) were associated with tobacco use.ConclusionYoung women with multiple children, moderate to severe socio-economic vulnerability, and alcohol and drug use were identified as more likely to use tobacco, indicating the need for targeted anti-tobacco interventions to curb the impact of tobacco on the growing burden of noncommunicable diseases in this setting
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
Cognitive and motor development in 3- to 6-year-old children born to mothers with hyperglycaemia first detected in pregnancy in an urban African population
No full textObjectives: hyperglycaemia first detected in pregnancy (HFDP), on the rise in urban sub-Saharan Africa (SSA), may negatively impact foetal neurodevelopment, with potential long-term cognitive consequences for the child. Data on this association from SSA is lacking, and we aimed to investigate the association in 3- to 6-year-old children in Soweto, South Africa. Methods: in this comparative study, we compared cognitive skills measured with the Herbst Early Childhood Development Criteria test in 95 children born to mothers with HFDP and 99 participants unexposed to maternal HFDP. Fine and gross motor skills were secondary outcomes. Ordinal regression analysis with known confounders was performed for children born at-term. Results: of children exposed to HFDP born at-term, 24.3% scored ‘high’ and 25.7% scored ‘low’ in the cognitive subsection of the test, as opposed to 37.7% and 12.9% in the HFDP-unexposed group, respectively. In ordinal regression, exposed participants had a significantly lower odds of scoring in a higher cognitive category when adjusting for maternal confounders and socio-economic status (OR 0.33, 95% CI 0.15–0.74, p = 0.007). No difference was found in gross motor development between the two groups; differences in fine motor development were attenuated after adjustment for maternal pregnancy factors and household socioeconomic status (OR 0.62, 95% CI 0.28–1.37, p = 0.239). Conclusions for Practice: exposure to HFDP was negatively associated with cognitive development at preschool age. Optimising maternal (preconception) health and early childhood cognitive stimulation could help more children reach their developmental potential.</p
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
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
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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