Browsing by Author "Dias, Juliana Chioda Ribeiro"
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- Confirmatory factor analysis of different versions of the Body Shape Questionnaire applied to brazilian university studentsPublication . Silva, Wanderson Roberto da; Dias, Juliana Chioda Ribeiro; Maroco, João; Campos, Juliana Alvares Duarte BoniniThis study aimed at evaluating the validity, reliability, and factorial invariance of the complete (34-item) and shortened (8-item and 16-item) versions of the Body Shape Questionnaire (BSQ) when applied to Brazilian university students. A total of 739 female students with a mean age of 20.44 (standard deviation = 2.45) years participated. Confirmatory factor analysis was conducted to verify the degree to which the one-factor structure satisfies the proposal for the BSQ's expected structure. Two items of the 34-item version were excluded because they had factor weights (lambda)< 40. All models had adequate convergent validity (average variance extracted =.43-.58; composite reliability=.85-.97) and internal consistency (alpha =.85-.97). The 8-item B version was considered the best shortened BSQ version (Akaike information criterion = 84.07, Bayes information criterion = 157.75, Browne-Cudeck criterion= 84.46), with strong invariance for independent samples (Delta chi(2)lambda(7)= 5.06, Delta chi(2)Cov(8)= 5.11, Delta chi(2)Res(16) = 19.30). (C) 2014 Elsevier Ltd. All rights reserved.
- Diabetes mellitus: Razão de prevalências nas diferentes regiões geográficas no Brasil, 2002 – 2007Publication . Dias, Juliana Chioda Ribeiro; Campos, Juliana Alvares Duarte BoniniConsiderando o Diabetes mellitus (DM) como um relevante problema de saúde no Brasil e a importância das estimativas de prevalência para planejamento e estratégias em saúde pública, propôs- se este trabalho com o objetivo de estimar a razão de prevalências do DM nos diferentes estados brasileiros nos períodos de 2002 a 2004 e 2005 a 2007. Trata-se de estudo descritivo, baseado em dados da população brasileira com diagnóstico de DM cadastrada no Sistema de Informação da Atenção Básica (SIAB) junto ao Ministério da Saúde. As taxas de prevalência foram calculadas para o período de 2002 a 2004 e para 2005 a 2007, e posteriormente estimou-se a Razão de Prevalências (R) por ponto e por intervalo de 95% de confiança (IC95%). Observou-se alta prevalência de DM nos estados brasileiros com aumento significativo (R>1; IC95%>1) entre os períodos em todos os estados brasileiros, com destaque para o Distrito Federal (R=1,9800; IC95%=1,9724–1,9876) e o estado do Maranhão (R=1,5217; IC95%=1,5198– 1,5235). Pode-se concluir que houve aumento significativo na prevalência de DM no Brasil de 2002 a 2007, sinalizando para a necessidade de formulação de estratégias de prevenção e controle da doença.
- Impact of sociodemographic characteristics, nutritional status and perceived stress in body weight concern of female college studentsPublication . Dias, Juliana Chioda Ribeiro; Silva, Wanderson Roberto da; Maroco, João; Campos, Juliana Alvares Duarte BoniniAim: to estimate the contribution of nutritional status, perceived stress and sociodemographic variables in college students’ body weight concern. Method: participated 850 Brazilian students of one public university. Information such as age, area of study and schedule of the undergraduate course, body weight and height, economic status, household’s education level, household, studies funding and medication intake due to studies and labour activity were collected. Perceived stress and body weight concern were assessed, respectively, with the Portuguese versions of the Perceived Stress Scale (PSS) and the Weight Concerns Scale (WCS). The impact of several variables on body weight concern was verified by a causal model developed using Structural Equation Modelling. The goodness-of-fit of the model was evaluated using chi-square ratio index and degrees of freedom (c2/df), Comparative Fit Index (CFI), Normed of Fit Index (NFI), and Root Mean Square Error of Approximation (RMSEA). The contribution (β) and significance of causal pathways were evaluated using the z-test critical ratios (p < .05). Results: a significant contribution of the variables perceived stress, economic status and nutritional status in college students’ body weight concern was verified. The fit of the final model was adequate (c²/df = 4.38; CFI = .91; GFI = .93; RMSEA = .06) and explained 19% of the variability in body weight concern with a positive impact of nutritional status, perceived stress and economic status. Conclusion: the results should serve as an alert to researchers in this area of study and health professionals, highlighting the importance of performing the diagnosis of such manifestations and/or propose prevention strategies.
- Validation of the Weight Concerns Scale applied to brazilian university studentsPublication . Dias, Juliana Chioda Ribeiro; Silva, Wanderson Roberto da; Maroco, João; Campos, Juliana Alvares Duarte BoniniThe aim of this study was to evaluate the validity and reliability of the Portuguese version of the Weight Concerns Scale (WCS) when applied to Brazilian university students. The scale was completed by 1084 university students from Brazilian public education institutions. A confirmatory factor analysis was conducted. The stability of the model in independent samples was assessed through multigroup analysis, and the invariance was estimated. Convergent, concurrent, divergent, and criterion validities as well as internal consistency were estimated. Results indicated that the one-factor model presented an adequate fit to the sample and values of convergent validity. The concurrent validity with the Body Shape Questionnaire and divergent validity with the Maslach Burnout Inventory for Students were adequate. Internal consistency was adequate, and the factorial structure was invariant in independent subsamples. The results present a simple and short instrument capable of precisely and accurately assessing concerns with weight among Brazilian university students.
- Weight concerns scale applied to college students : Comparison between pencil-and-paper and online formatsPublication . Dias, Juliana Chioda Ribeiro; Maroco, João; Campos, Juliana Alvares Duarte BoniniOnline data collection is becoming increasingly common and has some advantages compared to traditional paper-and-pencil formats, such as reducing loss of data, increasing participants' privacy, and decreasing the effect of social desirability. However, the validity and reliability of this administration format must be established before results can be considered acceptable. The aim of this study was to evaluate the validity, reliability, and equivalence of paper-and-pencil and online versions of the Weight Concerns Scale (WCS) when applied to Brazilian university students. A crossover design was used, and the Portuguese version of the WCS (in both paper-and-pencil and online formats) was completed by 100 college students. The results indicated adequate fit in both formats. The simultaneous fit of data for both groups was excellent, with strong invariance between models. Adequate convergent validity, internal consistency, and mean score equivalence of the WCS in both formats were observed. Thus, the WCS presented adequate reliability and validity in both administration formats, with equivalence/stability between answers.