A study performed in Baja California with a random sample of 2000 families provides a classification of risk factors: primary causal efficacy, associated risk factors, as well as factors that contribute to the perpetuation of the problem.
Un estudio realizado en Baja California con una muestra aleatoria de 2000 hogares ofrece una clasificación de factores de riesgo: eficacia causal primaria, factores de riesgo asociados, así como factores que contribuyen a la perpetuación del problema.