Using the U.S. Behavioral Risk Factor Surveillance System (BRFSS) survey dataset, this paper investigates the determinants of the number of individual preventive activities performed simultaneously over a year as well as the interactions between these preventive activities. Our results show the importance of information-related variables in driving preventive activities, in particular awareness of illness, access to information, having a general practitioner and the typology of information provided by health professionals. Results di_er according to the type of preventive activities considered, being behavioural or medicalised preventive activities. We also identify preventive activities which are complementary to each other. These results over useful insights in terms of prevention-related policies.