Análise fatorial exploratória aplicada a dados de avaliação do estado nutricional de idosos
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Data
2012-02-10
Autores
Paulino, Elen Daniele [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Os idosos normalmente tem baixo consumo alimentar, devido o processo de envelhecimento, resultando em um grave problema, a desnutrição, que associada a idade elevada merece muita atenção. Para um diagnóstico nutricional claro, que possibilite uma intervenção nutricional adequada, deve ser realizada uma avaliação precisa do estado nutricional dos idosos. Essa avaliação e feita com os indicadores objetivos e subjetivos. Os indicadores utilizados para o presente trabalho foram os objetivos: antropométricos e bioquímicos. As variáveis antropométricas foram massa corporal total, estatura, circunferência do braço, circunferência muscular do braço, área de gordura do braço, as dobras cutâneas tricipital, bicipital, subescapular e supra-ilíaca, porcentagem de gordura corporal, circunferência da panturrilha e índice de massa corpórea; e as bioquímicas foram albumina, transferrina e proteína C reativa. Um grande desafioo para a nutrição é agrupar e interpretar as variáveis antropométricas e bioquímicas conjuntamente. Logo, o objetivo do presente trabalho foi realizar a análise de componentes principais nos dados de uma amostra de 113 idosos, para explicar com um menor número de variáveis a maior parte das informa çoes no conjunto original de dados, seguida da análise fatorial exploratória nos mesmos dados, para obter fatores que agrupem as variáveis originais em subconjuntos de novas variáveis mutuamente não correlacionadas. As análises foram realizadas para todos os idosos, com todas as variáveis, e depois, com a retirada das variáveis que possuem baixas correlações com as demais, foram realizadas novas análises para todos os idosos, para os idosos divididos por faixa etária, e por sexo. Com a análise de componentes principais foi possível concluir que a variável circunferência do braço é a mais...
Elderly people usually have low nourishment consumption, due to the aging process, which results in a serious problem, malnutrition, and, when it is associated with age, it's certainly an issue that deserves special attention. In order to achieve a clear nutritional diagnosis, that is, one that allows an adequate nutritional intervention, it is necessary to develop a nutritional assessment of the elderly. Such assessment can be carried out using objective and subjective indicators. Some of the objectives indicators, anthropometric and biochemical indicators, were approached in this study. The anthropometric variables considered were total body mass; height; arm circumference; arm muscular circumference; arm fat area; triceps, biceps, subscapular and suprailiac skinfold thickness; body fat percentage; calf circumference and body mass index. The biochemical variables considered in this study were albumin, transferrin and C-reactive protein. Both grouping and interpreting the biochemical and anthropometric variables taken together constitute a major challenge for nutrition. Thus, the objective of this study was performing a principal component analysis for a sample of 113 elders, in order to maximize the explanation of the original data set using fewer variables as possible and then perform an exploratory factor analysis, over the same data, to extract the factors that group up the original variables in a subset of new, mutually non-correlated variables. The analysis were carried out for all elders using all variables and then new analysis were held for all elders, divided into age and sex classes, using the remaining variables after the removal of the lowest correlated ones. Through the principal component analysis, it was possible to conclude that the arm circumference is the most important, that is, the variable which has... (Complete abstract click electronic access below)
Elderly people usually have low nourishment consumption, due to the aging process, which results in a serious problem, malnutrition, and, when it is associated with age, it's certainly an issue that deserves special attention. In order to achieve a clear nutritional diagnosis, that is, one that allows an adequate nutritional intervention, it is necessary to develop a nutritional assessment of the elderly. Such assessment can be carried out using objective and subjective indicators. Some of the objectives indicators, anthropometric and biochemical indicators, were approached in this study. The anthropometric variables considered were total body mass; height; arm circumference; arm muscular circumference; arm fat area; triceps, biceps, subscapular and suprailiac skinfold thickness; body fat percentage; calf circumference and body mass index. The biochemical variables considered in this study were albumin, transferrin and C-reactive protein. Both grouping and interpreting the biochemical and anthropometric variables taken together constitute a major challenge for nutrition. Thus, the objective of this study was performing a principal component analysis for a sample of 113 elders, in order to maximize the explanation of the original data set using fewer variables as possible and then perform an exploratory factor analysis, over the same data, to extract the factors that group up the original variables in a subset of new, mutually non-correlated variables. The analysis were carried out for all elders using all variables and then new analysis were held for all elders, divided into age and sex classes, using the remaining variables after the removal of the lowest correlated ones. Through the principal component analysis, it was possible to conclude that the arm circumference is the most important, that is, the variable which has... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Nutrição - Avaliação, Idosos - Antropometria, Programas de avaliação nutricional, Nutrition - Evaluation, Older people
Como citar
PAULINO, Elen Daniele. Análise fatorial exploratória aplicada a dados de avaliação do estado nutricional de idosos. 2012. 74 f. Dissertação (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Biociências de Botucatu, 2012.