Cardiovascular reactivity patterns and pathways to hypertension: a multivariate cluster analysis.

Substantial evidence links exaggerated mental stress induced blood pressure reactivity to future hypertension, but the results for heart rate reactivity are less clear. For this reason multivariate cluster analysis was carried out to examine the relationship between heart rate and blood pressure reactivity patterns and hypertension in a large prospective cohort (age range 55-60 years). Four clusters emerged with statistically different systolic and diastolic blood pressure and heart rate reactivity patterns. Cluster 1 was characterised by a relatively exaggerated blood pressure and heart rate response while the blood pressure and heart rate responses of cluster 2 were relatively modest and in line with the sample mean. Cluster 3 was characterised by blunted cardiovascular stress reactivity across all variables and cluster 4, by an exaggerated blood pressure response and modest heart rate response. Membership to cluster 4 conferred an increased risk of hypertension at 5-year follow-up (hazard ratio=2.98 (95% CI: 1.50-5.90), P<0.01) that survived adjustment for a host of potential confounding variables. These results suggest that the cardiac reactivity plays a potentially important role in the link between blood pressure reactivity and hypertension and support the use of multivariate approaches to stress psychophysiology.

Depression and anxiety are associated with a diagnosis of hypertension 5 years later in a cohort of late middle-aged men and women.

The aim of this study is to examine the association between symptoms of depression and anxiety and hypertension status. Participants (n=455, 238 women) were drawn from the Dutch Famine Birth Cohort Study. In 2002-2004, they attended a clinic assessment during which socio-demographics, anthropometrics, resting systolic blood pressure (SBP) and health behaviours were measured. Symptoms of depression and anxiety were measured using the Hospital Anxiety and Depression Scale. In 2008-2009, participants completed a questionnaire, which asked whether they ever had a physician diagnosing them as suffering from hypertension. In separate regression models that initially adjusted for age and then additionally for sex, socio-economic status, smoking, sports participation, alcohol consumption, resting SBP, antidepressive and anxiolytic medication, whether or not participants were exposed to the Dutch famine in utero, BMI and waist:hip ratio, both depression and anxiety were positively associated with hypertension status. Those who met the criterion for possible clinical depression and anxiety were also more likely to be hypertensive, and these associations remained statistically significant in the fully adjusted regression model. In conclusion, symptoms of depression and anxiety were associated with a diagnosis of hypertension assessed 5 years later, although the mechanisms underlying these associations remain to be determined.