Three BMI Trajectories Linked to Health Outcomes in Type 2 Diabetes

Study Identifies Three BMI Patterns in Type 2 Diabetes

A study from the University of Eastern Finland, published in Diabetes Research and Clinical Practice, tracked 3,539 adults diagnosed with type 2 diabetes in North Karelia, Finland, between 2011 and 2014. Using electronic health records, researchers followed participants’ body mass index (BMI) changes over the 10 years after diagnosis.

The analysis revealed three distinct BMI trajectories: 77.7% of participants maintained a stable BMI, 14.6% experienced an increasing BMI, and 7.7% showed a decreasing BMI over time.

These patterns were used to examine links between BMI changes, comorbidities, medication use, and healthcare service utilization.

Increasing BMI Tied to More Comorbidities and Medication Use

Participants with an increasing BMI trajectory developed more chronic kidney and urinary tract diseases, sleep disorders (including sleep apnea), and chronic respiratory diseases compared to those with stable or decreasing BMI.

The use of diabetes medications that support weight management became more common over time, especially in the group with increasing BMI.

These findings suggest that rising BMI in type 2 diabetes is associated with a higher risk of developing additional health problems and may require more intensive management.

Decreasing BMI Linked to Higher Healthcare Use and Mortality

People with a decreasing BMI trajectory started with higher BMI but lost weight over the follow-up period, reaching levels similar to the stable group. However, this group had higher healthcare service use and higher mortality rates.

They also had a greater prevalence of memory disorders, cardiovascular diseases, and pulmonary diseases than the other groups.

The study notes that weight loss in this group may result from successful weight management or may reflect underlying diseases, aging, or frailty. The register-based data could not determine the exact causes of weight loss.

Implications for Metabolic Health Management

The findings highlight that people with type 2 diabetes are not a homogeneous group and that BMI changes over time can signal different health risks and care needs.

Long-term monitoring of BMI and weight changes should be part of comprehensive diabetes care, especially for older adults or those with multiple health conditions.

The researchers suggest that tracking BMI trajectories may help clinicians identify patients at higher risk and tailor individualized care pathways.

Study Limitations and Considerations

The study used electronic health records from a single region in Finland, which may limit how broadly the findings apply to other populations.

The reasons for weight loss in the decreasing BMI group could not be fully determined, so not all weight loss should be interpreted as positive.

Researchers emphasize the importance of assessing the underlying causes of weight changes, particularly in older patients and those with multiple health issues.