Introduction:Pertussis tetanus and diphtheria, (DPT) are highly contagious diseases in children; worldwide vaccination schemes have been established for the prevention of these pathologies. However, different factors can lead to non-compliance with them. Objective: To determine the factors associated with non-compliance with the vaccination schedule against diphtheria,pertussis and tetanus(DPT) in Peru in2019. Methods:Analytical, retrospective study of secondary source based on data from 7 187 mothers between 15 and 49 years old regarding the vaccination schedule of their children older than six months of age obtained in the Demographic and Family Health Survey (ENDES) Peru 2019.The vaccination schedule of children over six months of age and the sociodemographic variables of the mothers were analyzed. A bivariate and multivariate analysis was performed using the chi square test for indep...