this analysis showed that obesity prevention strategies produce two main effects a they increase the number of personyears lived in good health diseases are prevented or delayed and b they increase the number of personyears lived with chronic diseases survival with disease is extended however the net effect of the prevention strategies examined in the working age population was an overall decrease in the number of years lived with chronic diseases while an overall increase was observed only in the oldest age groups the monetary value of the potential production gains was generated by each prevention strategy based on published estimates of the value of absenteeism and presenteeism goetzel et al