Autonomic symptoms and diabetic neuropathy: a population-based study

Area of Science:

• Neurology
• Endocrinology
• Autonomic Neuroscience

Background:

• Autonomic dysfunction is a known complication of diabetes, but a complete symptom profile is lacking.
• Previous studies have not comprehensively assessed autonomic symptoms and deficits in diabetic populations.

Purpose of the Study:

• To estimate the prevalence of autonomic symptoms and deficits in patients with type 1 and type 2 diabetes.
• To compare autonomic function and symptoms between diabetic patients and healthy controls.
• To evaluate the correlation between self-reported autonomic symptoms and objective measures of autonomic deficits.

Main Methods:

• A population-based study involving 231 patients with diabetes (type 1 and type 2) and 245 healthy controls.
• Autonomic symptoms were assessed using the validated Autonomic Symptom Profile.
• Autonomic deficits (cardiovagal, sudomotor, adrenergic) were evaluated using the Composite Autonomic Severity Score (CASS).

Main Results:

• Autonomic impairment was prevalent: 54% in type 1 and 73% in type 2 diabetes.
• Common symptoms included orthostatic intolerance, secretomotor issues, and erectile dysfunction.
• Autonomic failure was generally mild (mean CASS 2.3), with moderate to severe dysfunction in 14% of patients.

Conclusions:

• Autonomic symptoms and deficits are frequent in diabetes but typically mild.
• The correlation between reported symptoms and objective deficits is weak, particularly in mild diabetic neuropathy.
• Separate evaluation of autonomic symptoms and deficits is crucial for effective patient management.