Adoption of preventive measures recommended by the public authorities in response to the COVID-19 pandemic during the lockdown in metropolitan France. CoviPrev survey, 2020

Introduction - In the context of the Covid-19 outbreak, as soon as the government announced a general lockdown on 17 March, the French national public health agency set up a surveillance system to monitor the adoption of preventive behaviors by the population The objective was to estimate the level of systematic adoption of the prevention measures recommended by the public authorities according to the characteristics of the population (socio-demographic, living conditions related to the Covid-19 epidemic and lockdown), identify the associated cognitive and affective factors (perceptions and knowledge) and monitor their trends during the lockdown period Methods - Independent samples of 2,000 people aged 18 and over living in metropolitan France were interviewed via the Internet The data presented are from five waves of surveys A total of 10,013 participants were interviewed between 30 March and 6 May 2020 The main variable of interest was the number of measures systematically adopted out of the 7 recommended by the public authorities The explanatory variables were grouped into three distinct blocks of variables: 1/sociodemographic variables;2/living conditions related to the Covid-19 outbreak and lockdown variables;3/cognitive and affective variables In order to quantify the strength of the association between the number of measures systematically adopted and the explanatory variables, multiple linear regressions, adjusted for sex, age, SPC, and waves of survey were performed Results - Our results showed that the French adopted, during the lockdown period, a high number of preventive measures, whatever the population profiles, with on average over the 5 waves of survey, more than 5 measures systematically adopted out of the 7 recommended by the public authorities Some differences according to the population profiles were observed Men, younger people, SPC- and inactive people, people with lower health literacy, people who reported continuing to work outside their home, people who did not have a relative with Covid-19 symptoms took fewer preventive measures During the lockdown period, the number of systematically adopted measures decreased The systematic adoption of these measures was mainly explained by cognitive and affective determinants The three main ones were the subjective norms (approval and adoption of measures by relatives), the perceived ability to adopt the preventive measures and, to a lesser extent, the perceived severity of the disease Conclusions - In order to promote the adoption of preventive behaviors in the population, our data suggest that priority should be given to strengthening the social norms of adoption of these behaviors and the capacities of individuals to implement them To this end, it will be important to communicate clearly and simply on the modes of transmission of the virus, on preventive measures to be adopted, and to create opportunities in the physical and social environment to facilitate their implementation (access to protective equipment, organization of physical distancing) According to a social marketing approach, the communication strategy would benefit from valuing a social norm for adopting prevention measures for oneself and for others, targeting in particular young adults and men