Objective: In post-transitional countries, obesity disproportionally affects women. Longitudinal studies can detect high-risk groups in whom to target actions. We investigated the magnitude and velocity of BMI changes in Chilean women of reproductive age and evaluated whether these trends vary in specific groups. Design: Longitudinal study. We measured weight and height in 2007 (baseline) and again in 2010 (follow-up); we estimated change in BMI (weight/height 2 ) within the 3-year period and assessed its relationship with age, years of education and parity, collected at baseline and follow-up using a questionnaire. Setting: Population-based cohort of low-to middle-income Chilean women. Subjects: Seven hundred and sixty-one women of reproductive age (mean 32?0 (SD 7?0) years), mothers of children who participate in the Growth and Obesity Cohort Study (GOCS). , P , 0?001). An increase in parity was positively associated with BMI change, independently of age, nutritional status and education (P , 0?05). Age and education were not associated with BMI change after controlling for other factors (P . 0?05). Conclusions: In Chile, a post-transitional country, we observed an alarming increase in obesity among women of reproductive age. Our results indicate that in this population actions need to be targeted at all women irrespective of their nutritional status. A key component of these policies should be avoiding excessive weight gain during pregnancy.
Keywords
Obesity Weight gain Women Latin AmericaOver the last two decades, the prevalence of obesity in women has increased dramatically, especially in middleincome countries (1) in which women are disproportionally affected by obesity. A variety of conditions are associated with obesity in women (including type 2 diabetes mellitus, CVD and breast cancer, among others) (2) that not only decrease their survival, but also compromise their current quality of life and reproductive health (3) . Moreover, maternal obesity is an important risk factor for childhood obesity (4) ; thus, obesity in women has a multiplicative detrimental effect.Chile, a post-transitional upper-middle-income Latin American country, has experienced a rapid epidemiological and nutritional transition (5) . The 2003 and 2010 National Health Surveys informed an obesity prevalence in women aged 25-44 years of 26?1 % and 28?3 %, respectively (6,7) . Although these data showed an increase in obesity, they were obtained from independent crosssectional surveys; therefore, they do not reflect life-course BMI trajectories and do not provide information of the velocity of BMI changes. This information is relevant to identify critical periods of life in which to intervene, as well as to detect high-risk groups in which to target preventive interventions.Presently, in Chile, as in several other countries, the public health-care system considers only secondary obesity preventive actions. Programmes are targeted to obese pregnant and elderly women and consider counselling and reductions in fat and sodium of th...