One registered the sociodemographic variables of gender, age, education, social stratum in Colombia this refers to the classification of residential property, which serves as a reference for establishing tariffs for public utilities using the categories of 1, 2 and 3 lower; 4 medium; and 5 upper, and health system affiliation defined as linking the different modalities of receiving health care, namely contributive, unaffiliated and poor, subsidized and through private healthcare.
Esta clasificación corresponde a las categorias de: 1, 2 y 3 estrato bajo; 4 estrato médio; y 5 y 6 estrato alto; y afiliación al sistema de salud definida como la vinculación a las diferentes modalidades de recibir la atención de salud: contributivo, pobre no afiliado, subsidiado y regímenes especiales.