Sisvan food intake markers from six to 23 months: critical analysis and validation
Marcadores do consumo alimentar do Sisvan de seis a 23 meses: análise crítica e validação
Rev. saúde pública (Online); 58 (), 2024
Publication year: 2024
ABSTRACT OBJECTIVE To explore the internal structure and analyze evidence of measurement invariance of the Sisvan form of food intake markers of the Food and Nutrition Surveillance System (Sisvan) for children aged six to 23 months. METHODS Sisvan microdata from 2015 to 2019 were used. After analyzing sample adequacy, exploratory factor analysis was carried out considering factor loadings (≥ 0.30 and < 0.85), communality (> 0.20), model fit indices - Tucker-Lewis index (TLI) > 0.90, and root mean square error of approximation (RMSEA) < 0.08. A critical analysis of the form items was performed to adjust the parameters. Measurement stability was investigated between age groups, macro-regions and longitudinally by multi-group confirmatory factor analysis in configural, metric, and scalar invariance models. Configural invariance was accepted if RMSEA < 0.08 and TLI and comparative fit index (CFI) > 0.90. Metric and scalar invariances were accepted if ΔRMSEA < 0.015 and ΔCFI < 0.01, compared to the previous model. RESULTS After critical analysis, items were grouped (vegetables and leafy greens; meat or eggs and liver) and excluded (salty food; porridge with milk; rice, potatoes, yams, cassava, flour, or pasta).
The exploratory model comprised three factors:
healthy complementary feeding (fruit; vegetables; orange or dark green leafy vegetables or fruits; meat, offal, or egg; beans), ultra-processed (yogurt; hamburger and/or sausages; sweetened drinks; instant noodles, packet snacks, or salty cookies; sandwich cookies, sweets, or treats), and milk feeding (breast milk; other milk), with satisfactory factor loadings, communalities and fit (TLI: 0.918, RMSEA: 0.071). The reformulated instrument was stable in the invariance models tested. CONCLUSIONS With the incorporation of the modifications to the Sisvan form, the food intake markers subsidize a more adequate interpretation of the feeding situation of children aged six to 23 months.
RESUMO OBJETIVOS Explorar a estrutura interna e analisar evidências de invariância de mensuração do formulário de marcadores do consumo alimentar do Sistema de Vigilância Alimentar e Nutricional (Sisvan) para crianças de seis a 23 meses. MÉTODOS Utilizaram-se microdados do Sisvan de 2015 a 2019. Após análise de adequação da amostra, realizou-se análise fatorial (AF) exploratória considerando valores de cargas fatoriais (≥ 0,30 e < 0,85), comunalidade (> 0,20) e índices de ajuste do modelo - índice de Tucker-Lewis (TLI) > 0,90 e raiz do erro quadrático médio de aproximação (RMSEA) < 0,08. Empreendeu-se uma análise crítica aos itens do formulário para adequação dos parâmetros. A estabilidade de mensuração foi investigada entre grupos etários, macrorregiões e longitudinalmente por AF confirmatória multigrupo em modelos de invariância configural, métrica e escalar. A invariância configural foi aceita se RMSEA < 0,08 e TLI e índice de ajuste comparativo (CFI) > 0,90. Invariâncias métrica e escalar foram aceitas se ΔRMSEA < 0,015 e ΔCFI < 0,01, comparando-se ao modelo anterior. RESULTADOS Após análise crítica, itens do formulário foram agrupados (legumes e verduras; carnes ou ovos e fígado) e excluídos (comida de sal; mingau com leite; arroz, batata, inhame, mandioca, farinha ou macarrão).