Effects of Comorbid Depressive Symptoms and Diabetes Mellitus on Functional Dyspepsia in Older Patients.

Objective: Diabetes mellitus (DM) is a global epidemic; comorbid depressive symptoms are highly prevalent worldwide and commonly manifests as physical symptoms, including functional dyspepsia (FD), a gastrointestinal psychosomatic disorder. This study aimed to explore the effects of comorbid depressive symptoms and DM on FD in older patients.

Methods: In total, 420 older patients with DM completed measures of depression, anxiety, and FD. Relevant demographic characteristics and medical information were self-reported and obtained from the hospital information system.

Results: Among older patients with DM, 30.48% had depressive symptoms. Patients with depressive symptoms were more likely to have FD than those without (42.19% vs. 20.21%, P = .000). Dyspepsia symptoms were more frequent in patients with depression (P = .022). The greater the amount of dyspepsia symptoms, the higher the depression symptoms score (P = .000). Furthermore, dyspepsia symptoms were positively correlated with depressive symptoms (r values were 0.292, 0.311, 0.297, 0.369; all had P < .05). Both FD subtypes, postprandial distress, and epigastric pain syndromes affected depressive symptoms (P < .05). Smoking was significantly associated with FD (P < .05). Diabetes mellitus complications, such as diabetic neuropathy, different therapeutic methods, and anxiety symptoms, influenced FD overlap (x ² values were 6.298, 16.314, and 30.744; P < .05). Anxiety (odds ratio = 1.832, 95% Confidence Intervals (CI) 1.185-2.834) was a risk factor for FD in comorbid depressive symptoms and diabetes (P < .05).

Conclusion: Comorbid depressive symptoms and DM overlapped with physical symptoms, such as FD, in older patients with DM. Lifestyle, diabetic factors, and anxiety were the associated risk factors.