Psychological Covariates of Blood Pressure Among Patients With Hypertension and Metabolic Syndrome

Objective: Previous research provides support for the role of psychosocial variables in the progression of hypertension. However, few studies have rigorously tested the longitudinal interplay between blood pressure and depressive symptoms, quality of life, and well-being. Fewer still disaggregate the effects of changes of these psychological variables within patients over time from the effects of differences between patients on essential hypertension. Method: A total of 185 patients with hypertension and metabolic syndrome (130 males, 70.3%; mean age 54 ± 10.93 years) volunteered for this multicentre study. We analyzed the longitudinal associations between office or daytime ambulatory blood pressure with depressive symptoms, well-being, and quality of life, measured at the same three time points (baseline and 36 and 48-week follow-up), through multilevel models and controlling for several sociodemographic and clinical factors. Results: Within-person increases in depressive symptoms were significant, positive time-varying covariates of both office and daytime blood pressure, even after controlling for several potential confounders (e.g., age, sex, changes over time in risk factors for metabolic syndrome). Within-person increases in well-being and mental health components of quality of life had similar negative associations with the level of blood pressure over time. Between-person differences in these variables tended not to predict blood pressure. Conclusions: Our findings provide a deeper insight on the relationship between variability of psychological variables within individuals and their levels of blood pressure. The findings support the need for health services to implement evidence-based psychological interventions that can foster a better management of the hypertensive disease.