Exploring the Spectrum of Comorbidities Associated with Primary Aldosteronism: Insights from a Large Real-World Case-Control Study.

Background: Primary aldosteronism (PA) is a common cause of endocrine hypertension, characterized by excessive aldosterone secretion leading to hypertension, hypokalemia, and metabolic alkalosis. While historically diagnosed based on this classic triad of symptoms, current understanding reveals a more nuanced presentation. This study aimed to investigate the prevalence of PA-associated diseases in a large German population. Methods: Medical records from the IQVIATM Disease Analyzer database were analyzed retrospectively. PA patients (n = 860) were matched with non-PA individuals (n = 4300) by age and sex. Associations between PA and predefined chronic diseases were examined using multivariable logistic regression. Results: PA was significantly associated with hypokalemia (7.8% vs. 1.6%, odds ratio (OR): 3.45; 95% confidence intervals (CIs): 2.41-4.96), hypertension (56.1% vs. 28.5%; OR: 2.37; 95% CIs: 2.00-2.81), hepatic steatosis (11.3% vs. 3.0%; OR: 1.85; 95% CIs: 1.34-2.57), gout (8.3% vs. 2.2%; OR: 1.64; 95% CIs: 1.15-2.35), chronic kidney disease (6.3% vs. 2.2%; OR: 1.59; 95% CIs: 1.10-2.31), diabetes mellitus not otherwise specified (7.9% vs. 2.9%; OR: 1.49; 95% CIs: 1.06-2.09), obesity (13.5% vs. 5.1%; OR: 1.38; 95% CIs: 1.05-1.82), and depression (14.8% vs. 6.2%; OR: 1.37; 95% CIs: 1.07-1.77). Conclusions: While the study design had limitations, including reliance on ICD codes for diagnosis, these findings underscore the critical need for early detection and personalized management strategies for PA to reduce associated risks and improve patient outcomes.