HealthcareObesity rates in Danish adults have trebled over past...

Obesity rates in Danish adults have trebled over past three decades

Credit: CC0 Public Domain

New research being presented at this year’s European Congress on Obesity (ECO) in Maastricht, Netherlands (4-7 May), suggests that rates of obesity in Danish adults have trebled over the past 34 years rising from 6% in 1987 to over 18% in 2021.

The study, by Dr. Stine Schramm from the University of Southern Denmark in Copenhagen, underscores the need for concerted population-wide action to reverse this trend and the high level of social inequality in .

“We still haven’t figured out what works to prevent obesity,” Dr. Schramm. “These trends reveal that increases in the have risen steadily over time with no indication of stagnation. Unfortunately, we currently have limited or no evidence to stop the rise in the , even though many interventions and policies to reduce obesity have been investigated. Our findings can take us one step further in targeting preventative strategies and to help predict the future burden of obesity and demands on .”

During the last decades, the prevalence of obesity (BMI 30 kg/m2 or higher) among adults in Denmark has increased dramatically, but whether this increase has been driven by age, period or cohort effects in Denmark is not known.

To find out more, researchers analyzed data for 91,684 participants with height and weight measurement recorded in the Danish Health and Morbidity Studies—representative surveys of the adult population (aged 16 years and older), conducted in 1987, 1994, 2000, 2005, 2010, 2013, 2017 and 2021.

The authors examined how the increase in obesity prevalence was attributed to change in the population’s age distribution (age effect), if people born at specific points in time had a higher risk of obesity (cohort effect) or if the increase affected all age groups and birth cohorts over time (period effect).

The analyses found that the prevalence of obesity increased from 6% in 1987 to over 18% in 2021, with a similar pattern in men (19%) and women (18%) and in all . Obesity prevalence increased by age until age 65-74 years, and declined in the oldest age group (75+ years).

In addition, a strong period effect was found with a linear trend, where the risk of obesity increased continually with each recent survey year. Only a minor part (14%) of the increase in obesity prevalence could be explained by changes in the of the Danish population and no birth cohorts were found to be at higher risk of obesity.

“We know that there are stark inequalities in obesity across Denmark”, says Dr. Schramm. “Earlier research has shown that the proportion of obesity is almost three times higher in Danish adults with a low level of education (, 27%) compared to those with the highest education level (undergraduate degree or higher; 10%). There is also increasing evidence that adult health and disease, including BMI trajectories, are founded in early life. But more research is needed to understand how exposures such as psychosocial stress play a role in this. The mechanisms behind the rising obesity prevalence is much more than just a matter of diet and .”

Although the authors cannot draw conclusions about cause and effect from the study, they say that their findings support the notion that secular changes over time are important determinants of the trends in obesity.

CDC: Prevalence of obesity 42.4 percent in 2017 to 2018

Provided by
European Association for the Study of Obesity

Obesity rates in Danish adults have trebled over past three decades (2022, May 7)
retrieved 8 May 2022

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