OBJECTIVE: Persons with bipolar disorder face excess risk of cardiovascular disease, although the biobehavioral mechanisms and time course are unclear. We measured vascular stiffness in a cross-sectional sample of participants with bipolar disorder and compared results to published normative data to assess time-course and relationship to behavioral risk factors. METHODS: 62 individuals with bipolar disorder (33±6.7years; 64% female) underwent non-invasive assessment of arterial stiffness through arterial applanation tonometry. Lifetime tobacco exposure was estimated on clinical interview. Physical activity was assessed using the long-version of the International Physical Activity Questionnaire (IPAQ). A food frequency questionnaire was used to compute Alternate Healthy Eating Index (AHEI), a measure of overall dietary quality. Medication histories were systematically abstracted from pharmacy records. RESULTS: Participants over the age of 32 (median split) had greater arterial stiffness than expected from age-based population norms for pulse wave velocity (PWV) (7.6 vs. 7.0m/s, p=.02) and estimated aortic augmentation pressure (AIx) (14.2 vs. 8.2%, p=.0002). The younger portion of the sample did not differ from population norms on these measures (PWV 6.3 vs. 6.4m/s, p=.45 and AIx 7.6 vs. 7.4%, p=.60). In the older half of the sample, physical activity was inversely associated with AIx and poorer diet marginally associated with PWV. These findings were independent of body mass index (BMI), which was strongly related to arterial stiffness. CONCLUSION: Risk for vascular disease may be acquired over the long-term course of affective illness. This risk appears to reflect maladaptive health behaviors, which may be amenable to intervention.
OBJECTIVE:Persons with bipolar disorder face excess risk of cardiovascular disease, although the biobehavioral mechanisms and time course are unclear. We measured vascular stiffness in a cross-sectional sample of participants with bipolar disorder and compared results to published normative data to assess time-course and relationship to behavioral risk factors. METHODS: 62 individuals with bipolar disorder (33±6.7years; 64% female) underwent non-invasive assessment of arterial stiffness through arterial applanation tonometry. Lifetime tobacco exposure was estimated on clinical interview. Physical activity was assessed using the long-version of the International Physical Activity Questionnaire (IPAQ). A food frequency questionnaire was used to compute Alternate Healthy Eating Index (AHEI), a measure of overall dietary quality. Medication histories were systematically abstracted from pharmacy records. RESULTS:Participants over the age of 32 (median split) had greater arterial stiffness than expected from age-based population norms for pulse wave velocity (PWV) (7.6 vs. 7.0m/s, p=.02) and estimated aortic augmentation pressure (AIx) (14.2 vs. 8.2%, p=.0002). The younger portion of the sample did not differ from population norms on these measures (PWV 6.3 vs. 6.4m/s, p=.45 and AIx 7.6 vs. 7.4%, p=.60). In the older half of the sample, physical activity was inversely associated with AIx and poorer diet marginally associated with PWV. These findings were independent of body mass index (BMI), which was strongly related to arterial stiffness. CONCLUSION: Risk for vascular disease may be acquired over the long-term course of affective illness. This risk appears to reflect maladaptive health behaviors, which may be amenable to intervention.
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