Mid-point for open-ended income category and the effect of equivalence scales on the income-health relationship

Abstract

To estimate the mid-point of an open-ended income category and to assess the impact of two equivalence scales on income-health associations. Data were obtained from the 2010 Brazilian Oral Health Survey (Pesquisa Nacional de Saúde Bucal -SBBrasil 2010). Income was converted from categorical to two continuous variables (per capita and equivalized) for each mid-point. The median mid-point was R$ 14,523.50 and the mean, R$ 24,507.10. When per capita income was applied, 53% of the population were below the poverty line, compared with 15% with equivalized income. The magnitude of income-health associations was similar for continuous income, but categorized equivalized income tended to decrease the strength of association. DESCRIPTORS: RESUMOObjetivou-se estimar o ponto médio de categoria aberta de renda e o efeito de escalas de equivalência nas associações renda-saúde. Dados foram obtidos da Pesquisa Nacional de Saúde Bucal 2010 (SBBrasil). A renda foi convertida da variável categórica para contínua (per capita e equivalizada) para cada ponto médio. A mediana da categoria aberta de renda foi R$ 14.523,50 e a média, R$ 24.507,10. O percentual da população abaixo da linha de pobreza foi de 53% com renda per capita e 15% com renda equivalizada. A magnitude das associações foi similar na escala contínua, mas, quando categorizada, a renda equivalizada reduziu sua força.

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