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Long-term Change in Physiological Markers and Cognitive Performance in Type 2 Diabetes: The Look AHEAD Study
Owen T Carmichael1, Rebecca H Neiberg2, Gareth R Dutton3
1Biomedical Imaging Center, Pennington Biomedical Research Center, Baton Rouge, Louisiana.
The Journal of Clinical Endocrinology and Metabolism
|August 27, 2020
Summary
Improved blood sugar control in type 2 diabetes mellitus (T2DM) patients is linked to better cognitive function. Lifestyle interventions show promise for cognitive health in T2DM.
Area of Science:
- Endocrinology
- Neuroscience
- Public Health
Background:
- Cognitive function decline is a concern in individuals with type 2 diabetes mellitus (T2DM).
- The impact of physiological improvements from intensive lifestyle interventions (ILI) on cognitive function in T2DM patients is not well-established.
- Understanding these associations is crucial for developing targeted health strategies.
Purpose of the Study:
- To investigate the relationship between improvements in physiological markers (glycemic control, body weight, physical activity) and cognitive function in older adults with T2DM.
- To assess whether changes in body weight and blood sugar control during an ILI are associated with cognitive enhancements.
- To explore potential moderating effects of baseline adiposity and cardiovascular disease (CVD) history on these associations.
Main Methods:
- A multisite randomized controlled trial, the Action for Health in Diabetes (Look AHEAD) study, involving 1089 participants aged 45-76 with T2DM.
- Participants underwent an intensive lifestyle intervention (ILI).
- Cognitive function was assessed using multiple tests (e.g., Rey Auditory Verbal Learning Test, Digit Symbol Coding) at baseline and during follow-up (mean 8.6 and 11.5 years).
Main Results:
- Greater improvement in blood sugar control (fasting glucose, HbA1C) was significantly associated with better cognitive scores (AVLT, DSC).
- Weight loss demonstrated mixed associations with cognitive function; greater BMI reduction was linked to worse AVLT scores but better DSC scores in overweight (non-obese) individuals.
- Associations were strongest among participants who were overweight (not obese) at baseline and those with a history of cardiovascular disease (CVD).
Conclusions:
- Improvements in glycemic control during ILI are associated with enhanced cognitive performance in older adults with T2DM.
- The impact of weight loss on cognitive function appears less consistent and may depend on baseline weight status.
- Adiposity and CVD history may influence the relationship between physiological improvements and cognitive outcomes in T2DM.
Keywords:
cognitive functionglycemic controllifestyle interventionphysical activitytype 2 diabetesweight lossMore Related Videos
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