ABSTRACT
Poorly formulated search strategies can have great influences on the results of a meta-analysis, since it directly impacts the amount and adherence to the theme of the works used for study, therefore, the formulation of a consistent and functional search strategy is essential for the review system to achieve its goals. The objective of this work was to study the impact of different search strategies in a systematic review by performing a meta-analysis to estimate heritability for the mastitis trait in dairy cattle. Once the search strategies were defined, the searches carried out in the Web of science, Scopus, Scielo and Pubmed databases returned 921 studies from which, after going through the identification, selection, eligibility and inclusion processes, 25 studies were selected. Withdrawals from selected articles, 26 heritability estimates were used in the meta-analysis. A random effect model was used, with all analyzes performed by the R program, through the Metafor package. The estimates obtained through the combined statistics of studies for mastitis, presented values of low magnitude (0.05 and 0.06). The effects of search strategies have a significant impact on the meta-analysis estimates produced.
Estratégias de buscas mal formuladas podem apresentar grandes influências nos resultados de uma metanálise, uma vez que impacta diretamente na quantidade e aderência ao tema dos trabalhos utilizados para estudo, portanto, a formulação de uma estratégia de busca consistente e funcional é fundamental para que a revisão sistemática atinja seus objetivos. O objetivo deste trabalho foi estudar o impacto de diferentes estratégias de busca em uma revisão sistemática por meio da realização de uma metanálise para estimação de herdabilidade para a característica mastite em gado de leite. Uma vez definidas as estratégias de busca, as pesquisas realizadas nas bases de dados Web of science, Scopus, Scielo e Pubmed retornaram 921 estudos dos quais, após passarem pelos processos de identificação, seleção, elegibilidade e inclusão, 25 estudos foram selecionados. Retiradas dos artigos selecionados, 26 estimativas de herdabilidades foram utilizadas na realização da metanálise. Utilizou-se um modelo de efeito aleatório, sendo todas as análises realizadas pelo programa R, por meio do pacote Metafor. As estimativas obtidas através da estatística combinada de estudos para mastite, apresentou valores de baixa magnitude (0,05 e 0,06). Os efeitos das estratégias de busca têm impacto significativo nas estimativas de metanálise produzidas.
Subject(s)
Animals , Cattle , Meta-Analysis as Topic , Genetic Enhancement/methods , Heredity/genetics , Mastitis, Bovine/geneticsABSTRACT
Aim: To investigate final-year dental students' assessment of their achievement of professional profile, competencies and skills as set out in the National Curriculum Guidelines (NCG) and its association with demographic characteristics. Methods: A cross-sectional study was carried out at the dental school of the Federal University of Goiás, Brazil. The study population (N= 205) was composed of all undergraduate students finishing their courses under the new curricula over a five-year period. They were asked to score their achievement of the professional profile, competencies and skills proposed by the NCG using a 3-point scale. Frequency distribution of the data was described and scores for competencies and skills were calculated. The total score was the sum of those obtained in each single item. For group comparisons regarding to the students' demographic characteristics, Mann-Whitney test was performed with statistical significance of 5%. Results: The sample was composed by 204 final year students (response rate= 99.5%). Only one student considered that she did not have the profile proposed in the NCG. 52% of them reported they had fully achieved the professional profile, while the remaining reported they had partially achieved it. High percentages of responses indicating partial or total achievement of general and specific competencies and skills were also found. The total score ranged from 36 to 72 (mean= 60.2; SD= 7.68; median= 62.0). Women reported higher levels of competencies and skills relating teamwork and the social context of the profession. Men reported higher levels of skills related to decision-making and activities aimed at diasease diagnosis and interventions. Younger students, compared to older ones, had higher scores on five items of specific competencies and skills. Conclusion: Most of the students considered to have achieved the professional profile, competencies and skills proposed in the NCG, and their perceptions were associated with demographic characteristics (age and sex)