Evaluating Fat Mass Index and Lean Body Mass Index in Diabetes Patients

Importance of Accurate Obesity Measurement

A comprehensive data analysis has examined fat mass index (FMI) and lean body mass index (LBMI) as potential indicators of cardiovascular risk in patients with diabetes. Obesity is a significant risk factor for various health issues, particularly heart disease. Accurate measurement of obesity is essential not only for studying its impact on populations but also for assessing individual health risks.

Limitations of Body Mass Index (BMI)

Body mass index (BMI) is a widely used method for measuring obesity, calculated by dividing a person’s weight by their height squared. However, BMI has notable limitations as it does not differentiate between lean muscle mass and fat mass. For instance, an athlete with high muscle mass may be categorized as obese by BMI standards, despite the protective health benefits of increased muscle. Conversely, individuals with type 2 diabetes mellitus (T2DM) tend to have lower lean muscle mass relative to fat mass, which further complicates the accuracy of BMI in this population. Consequently, alternative measures may provide better assessments of obesity and heart disease risk in diabetic patients.

Research Findings on Fat Mass Index and Cardiovascular Risk

Researchers analyzed data from over 10,250 T2DM patients, some of whom were at risk for heart disease, who participated in the Action to Control Cardiovascular Risk in Diabetes (ACCORD) Study. This randomized controlled trial aimed to determine whether intensive management of blood glucose, blood pressure, and lipids could lower the incidence of cardiovascular disease (CVD). Using the ACCORD data, the researchers calculated FMI and LBMI for the participants and explored the relationship between these indices and cardiovascular risk.

The findings revealed that T2DM patients with a higher FMI faced an increased risk of major cardiovascular events compared to those with lower FMI. While there was a trend suggesting that higher LBMI correlated with fewer major adverse cardiovascular (CV) events, the results did not achieve statistical significance.

Conclusion and Implications

The researchers concluded that FMI has a robust association with an elevated risk of cardiovascular disease and significant cardiovascular events in T2DM patients. In contrast to previous studies, an increase in LBMI did not demonstrate a protective effect in this demographic.

References

Xing Z, Tang L, Chen J, et al. Association of predicted lean body mass and fat mass with cardiovascular events in patients with type 2 diabetes mellitus. Canadian Medical Association Journal 2019;191(38):E1042-E1048. Canadian Medical Association Journal, Press release, Sept 23, 2019. Fat mass index, not BMI, associated with cardiovascular events in people with diabetes. https://www.eurekalert.org/pub_releases/2019-09/cmaj-fmi091819.php

Author

Written by Julie McShane, MA MB BS

Image Credit

Image by Vidmir Raic from Pixabay