Correlation among cognitive functions, mood disturbance, and health-related quality of life in type 2 diabetes mellitus: A cross-sectional survey

Background: The purpose of this study was to find the possible correlation among cognitive functions, mood disturbance, and health-related quality of life in people with type 2 diabetes mellitus (T2DM). Methods: This study was a preliminary cross-sectional survey study carried out on 40 participants diagnosed with T2DM for more than 2 years. The age group ranged between 35 and 55 years. Demographic data were recorded. Cognitive function was assessed using Mini-Mental State Examination, mood disturbance was assessed using the profile of mood states questionnaire and health-related quality of life was assessed using the Euroqol-5d-5l questionnaire. Results: There was a significant negative correlation between cognitive functions and mood disturbance (r = −0.45, P < 0.05), no correlation between cognitive functions and health-related quality of life (examiner scoring) (r = 0.29, P = 0.06), significant weak positive correlation between cognitive functions and health-related quality of life (participant self-score) (r = 0.37, P < 0.05). Significant strong negative correlation between mood disturbance and health-related quality of life (examiner scoring) (r = −0.66, P < 0.001), significant negative correlation between mood disturbance and health-related quality of life (participant self-score) (r = −0.62, P < 0.001). Conclusion: Cognitive functions and mood disturbances are important factors that may adversely affect health-related quality of life in people with T2DM. More attention should be given to cognitive function and mood disturbance in people with T2DM to minimize the negative impact of the illness on their health-related quality of life.