Summary. The paper analyses the data resulting from the Italian campaign for newborns’ parents, ‘GenitoriPiù’, and focuses on the assessment of healthcare workers’ knowledge about sudden infant death syndrome. Considering two different response sets (dichotomous and polytomous), we used a Rasch model and a logistic quantile regression to analyse which demographic and professional backgrounds influenced the degree of knowledge of this topic. Significant differences between regions are evident, and the effect of training initiatives is proven as a way of rectifying these differences. With regard to professional background, the best-prepared healthcare workers are paediatricians and healthcare workers working in birth centres and family planning clinics.