Introduction:

30 % of the world population currently has overweight and obesity problems, while in Ecuador this is 64.68 %. The identification of population groups more vulnerable to overweight and obesity is a basic issue to establish better public policies.

Objective:

to identify the population groups at risk of overweight and obesity according to socio-demographic determinants (ethnicity, marital status, poverty and age).

Methods:

a cross-sectional study. Data from 89,212 adults of both sexes were analyzed. Body mass index (BMI) was used to assess the prevalence of overweight and obesity, and multiple linear regression analysis was performed to relate BMI to sociodemographic determinants.

Results:

women had an average of 1.03 kg/m2 more than men, and BMI rose by 0.04 kg/m2 for each year of age. In relation to marital status, married people presented 1.14 kg/m2 more than single people. Taking into account the poverty quintiles and q1 as a reference category, quintiles 2, 3 and 4 showed a higher BMI of 0.65, 0.88, 0.77 and 0.41 kg/m2, respectively (p < 0.001). Regarding ethnicity, indigenous people had a BMI 0.78 kg/m2 less than whites; Montubios and Afro-Americans had 0.37 and 0.61 kg/m2, respectively, more than whites. People residing in the urban area present 0.41 kg/m2 more than the residents in the rural area.

Conclusions:

we identified groups of higher nutritional risk such as women and married people for overweight and obesity, while indigenous people and the poorest people were at risk for low weight, which indicates that in Ecuador adults have problems of both excess and deficit. It is necessary to implement policies aimed at specific population groups.

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