Aim: Studies have provided insights into the different attitudes and values of healthcare professionals and parents towards extreme prematurity. This study explored societal attitudes and values in Switzerland with regard to this patient group.Methods: A nationwide trilingual telephone survey was conducted in the French-, Germanand Italian-speaking regions of Switzerland to explore the general population's attitudes and values with regard to extreme prematurity. Swiss residents of 18 years or older were recruited from the official telephone registry using quota sampling and a logistic regression model assessed the influence of socio-demographic factors on end-of-life decision-making.Results: Of the 5112 people contacted, 1210 (23.7%) participated. Of these 5% were the parents of a premature infant and 26% knew parents with a premature infant. Most participants (77.8%) highlighted their strong preference for shared decision-making, and 64.6% said that if there was dissent then the parents should have the final word. Overall, our logistic regression model showed that regional differences were the most significant factors influencing decision-making.