A non-experimental observational cross-sectional study was conducted among high school students in Guzman City, which is considered to be an average-size city in Jalisco according to its economic development approx. 100,000 inhabitants. Students were also recruited from several small cities 15,000 to 100,000 inhabitants and from mixed and rural localities less than 15,000 inhabitants from the south-central region of Jalisco, Mexico.
Estudio con diseño no experimental observacional, transversal, dirigido a estudiantes de preparatorias provenientes de Ciudad Guzmán una ciudad considerada media en Jalisco por su desarrollo socioeconómico 100000 habitantes aprox., de algunas ciudades pequeñas 15 mil a menos de 100000 habitantes y de localidades mixtas y rurales menores a 15000 habitantes de la región centro sur de Jalisco, México.