[영문]Objectives: Lifestyle changes to prevent type 2 diabetes among high-risk persons have been shown to be cost-effective. This study investigates the cost-effectiveness of a community-based program promoting general population lifestyle changes to prevent diabetes.Methods: The 10-year program was implemented in three municipalities in Sweden. Effectiveness was measured with a quasiexperimental cohort design, that is, risk factor levels in a population group aged 36?56 years at baseline and 8?10 years later (2,149 men; 3,092 women) in the program municipalities and a control area were compared. The incremental cost-utility analysis included future diabetes and cardiovascular disease-related health effects and societal costs (discounted 3 percent), estimated by a Markov model.Results: In all areas, risk factor levels increased during follow-up, leading to increased societal costs of between SEK40,000 and 90,000 (1 Euro 2004 = SEK9.13; 1 US