Objective: Posttraumatic stress disorder (PTSD) results in substantial disability, including increased risk of cardiovascular disease (CVD). Poor health behaviors are major risk factors for initial and recurrent CVD events. Therefore, this study investigated whether PTSD is associated with poor health behaviors in patients with CVD.
Method: Cross-sectional study of 1,022 men and women with CVD. PTSD was assessed with the Computerized Diagnostic Interview Schedule for DSM-IV. Physical activity, medication adherence and smoking history were determined by self-report questionnaires. Multivariate logistic and linear regression models were used to evaluate the association of PTSD with health behaviors.
Results: Of the 1,022 participants, 95 (9%) had PTSD. PTSD was associated with significantly higher rates of physical inactivity in terms of overall exercise (OR 1.6, 95% CI [1.0-2.6]; p = .049), light exercise (OR 1.7, 95% CI [1.0-2.9]; p = .045), and self-rated level of exercise compared to others of their age and sex (OR 1.8, 95% CI [1.0-3.0]; p = .047). Participants with PTSD were more likely to report medication nonadherence, including forgetting medications (OR 1.8, 95% CI [1.0-3.3]; p = .04) or skipping medications (OR 1.7, 95% CI [1.1-2.9]; p = .03). Participants with PTSD also reported a greater smoking history (β 6.4 pack years, 95% CI [1.8-10.9]; p = .006), which remained significant after adjustment for depression and income.
Conclusions: Among patients with heart disease, those with PTSD were more likely to report physical inactivity, medication nonadherence and smoking. The majority of these associations were explained by adjustment for comorbid depression and lower income.