Factors Associated with the Presence of Post-COVID Syndrome in Older Patients with Arterial Hypertension

Background: Diagnosing post-COVID syndrome (PCS) in older adults with hypertension is difficult due to heterogeneity and multimorbidity. We aimed to identify factors associated with PCS. Methods: An observational study was conducted from June 2024 to April 2025. Patients aged 60–89 years with arterial hypertension were enrolled; PCS was verified according to the national protocol. Between-group comparisons used standard tests. Multivariable logistic regression with pre-specified clinical predictors estimated independent associations. Results: A total of 291 patients with arterial hypertension were included in the study. Patients were grouped by PCS status (PCS = 101; controls = 190). In multivariable analysis, female sex (OR 3.64; 95% CI 1.22–10.82), younger age (OR 0.93; 95% CI 0.89–0.98), lower systolic blood pressure (SBP) (OR 0.98; 95% CI 0.96–1.00), and rhythm disturbances (OR 2.63; 95% CI 1.07–6.49) were associated with PCS; other predictors were not significant. Model discrimination was moderate (AUC 0.728; 95% CI 0.668–0.787; Brier score 0.193) with positive net benefit across thresholds ~0.10–0.65. Conclusions: In older hypertensive adults, female sex, younger age, lower SBP, and rhythm disturbances indicate higher PCS likelihood, supporting risk-stratified monitoring and management.