In Brazil, there are few data about this topic and all refer to the perspective of society. Since the 1990s, researchers in developed countries have analysed the cost of obesity and recognized its significant economic impact on health systems. Obesity, and the higher risk for several associated non-communicable diseases (NCDs), results in greater use of healthcare services and higher healthcare costs. In the adult population of state capitals, obesity has affected an additional 1 % of the population every year, since the mid-2000s. In Brazil, obesity is increasing, according to national surveys conducted since the 1970s, across all age groups and genders. According to global estimates, between 19, obesity rates rose from 7.9 to 13.8 % among women and from 4.8 to 9.8 % in men. Obesity can be considered a global public health problem that affects virtually all countries worldwide, including both developing and developed nations. Obesity is associated with additional medicine expenses, increasing the negative impact on household budgets and public expenditure. An adjusted model confirmed that the presence of obese in the households increased medicine expenses. Monthly household expenses on medicines per capita in households with obese was US$ 20.40, 16 % higher than in households with no obese. Out-of-pocket expenses on medicines were always higher than the cost of medicines obtained through the public sector, and 32 % of households had at least one obese as resident. A two-part model was employed to assess the influence of obesity on medicine expenses, with monthly household medicine expenses per capita as outcome, presence of obese in the household as explanatory variable, and adjustment for confounding variables. Information on nutritional status and medicines acquired and their cost in the past 30 days were analyzed. This study was based on data from the 2008–2009 Brazilian Household Budget Survey, with a representative population sample of 55,970 households as study units. We aimed to describe average monthly household medicine expenses according to source of funding, public or private, and to estimate the influence of the presence of obese residents in households on total medicine expenses. Obesity can be considered a global public health problem that affects virtually all countries worldwide and results in greater use of healthcare services and higher healthcare costs.
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