Rebecca L. Dekker

Marital Status as an Independent Predictor of Event-Free Survival of Patients With Heart Failure

BACKGROUND Depressive symptoms are a well-known predictor of mortality in patients with heart failure, and positive spousal support is associated with improved outcomes in these patients. However, in the context of depressive symptoms, the effect on survival of having a spouse is unknown. OBJECTIVE To determine the effect of marital status on event-free survival in patients with heart failure who did or did not have depressive symptoms. METHODS Depressive symptoms were assessed by using the Beck Depression Inventory-II in patients with heart failure who were followed-up for up to 4 years to collect data on mortality and hospitalizations. Patients were grouped according to the presence and absence of depressive symptoms by using the standard cutoff score of 14 on the Beck Depression Inventory-II. Kaplan-Meier and Cox regression analyses were used to compare event-free survival for married and nonmarried patients who were stratified according to the presence or absence of depressive symptoms. RESULTS Of 166 patients, 56% were married, and 33% had depressive symptoms. Levels of depressive symptoms were similar between married and nonmarried patients (10.9 vs 12.1; P = .39). Married patients experienced longer event-free survival than did nonmarried patients (P = .009), even with stratification according to depressive symptoms (P = .01). CONCLUSIONS Patients with a spouse had longer event-free survival than nonmarried patients did, even in the context of depressive symptoms.

Medication adherence mediates the relationship between marital status and cardiac event-free survival in patients with heart failure

OBJECTIVE Prognosis is worse in unmarried patients compared with married patients with heart failure (HF). The reasons for differences in outcomes are unclear, but variations in medication adherence may play a role, because medication adherence is essential to achieving better outcomes. The study objective was to determine whether medication adherence mediated the relationship between marital status and cardiac event-free survival in patients with HF. METHODS Demographic, clinical, and psychosocial data were collected by questionnaires and medical record review for 136 patients with HF (aged 61 ± 11 years, 70% were male, 60% were in New York Heart Association class III/IV). Medication adherence was monitored objectively for 3 months using the Medication Event Monitoring System. Cardiac event-free survival data were obtained by patient/family interview, hospital database, and death certificate review. A series of regression and Cox survival analyses were performed to determine whether medication adherence mediated the relationship between marital status and event-free survival. RESULTS Cardiac event-free survival was worse in unmarried patients than in married patients. Unmarried patients were more likely to be nonadherent and 2 times more likely to experience an event than married patients (P = .017). Marital status was not a significant predictor of event-free survival after entering medication adherence in the model, demonstrating a mediation effect of adherence on the relationship of marital status to survival. CONCLUSION Medication adherence mediated the relationship between marital status and event-free survival. It is important to design interventions to increase medication adherence that take into account subgroups, such as unmarried patients, who are at higher risk for nonadherence.

Characteristics associated with anxiety, depressive symptoms, and quality-of-life in a large cohort of implantable cardioverter defibrillator recipients.

OBJECTIVE Although most patients with implantable cardioverter defibrillators (ICDs) adjust well, some have considerable psychological distress. Factors associated with psychological adjustment in ICD-recipients are still not well understood. Our purpose was to describe quality-of-life (QoL) and prevalence of self-reported symptoms of anxiety and depression in a large national cohort of ICD-recipients, and to determine socio-demographic, clinical, and ICD-related factors associated with these variables. METHODS A cross-sectional, correlational design was used. All eligible adult ICD-recipients in the Swedish ICD- and Pacemaker Registry were invited to participate. Symptoms of anxiety and depression were measured using the Hospital Anxiety and Depression Scale (HADS), and QoL with the EuroQol-5D. RESULTS A total of 3067 ICD-recipients (66±11years, 80% male) were included. The mean HADS score was 3.84±3.70 for anxiety symptoms and 2.99±3.01 for symptoms of depression. The mean EQ-5D index score was 0.82±0.21. The probability of symptoms of anxiety and depression was associated with younger age, living alone, and a previous history of myocardial infarction or heart failure. Additionally, female ICD-recipients had a higher probability of symptoms of anxiety. A higher level of ICD-related concerns was most prominently related to symptoms of anxiety, depressive symptoms and poorer QoL, while number of shocks, ICD-indication and time since implantation were not independently related. CONCLUSIONS In this large cohort of ICD-recipients, the association of ICD-related concerns with symptoms of anxiety, depressive symptoms, and poor QoL suggests that ICD specific factors should be addressed in order to improve outcomes.

Medication adherence, depressive symptoms, and cardiac event-free survival in patients with heart failure.

BACKGROUND Medication nonadherence and depressive symptoms predict hospitalization and death in patients with heart failure (HF). Depressed patients have lower medication adherence than nondepressed patients. However, the predictive power of the combination of medication adherence and depressive symptoms for hospitalization and death has not been investigated in patients with HF. OBJECTIVE The aim of this study was to explore the combined influence of medication adherence and depressive symptoms for prediction of cardiac event-free survival in patients with HF. METHODS AND RESULTS We monitored medication adherence in 216 HF patients who completed the Patient Health Questionnaire-9 (PHQ-9) at baseline. Medication adherence was measured objectively with the use of the Medication Event Monitoring System (MEMS). Patients were followed for up to 3.5 years to collect data on cardiac events. Survival analyses were used to compare cardiac event-free survival among groups. The risk of experiencing a cardiac event for patients with medication nonadherence and depressive symptoms was 5 times higher than those who were medication adherent without depressive symptoms. The risk of experiencing a cardiac event for patients with only 1 risk factor was 1.2-1.3 times that of those with neither risk factor. CONCLUSIONS Medication nonadherence and depressive symptoms had a negative synergistic effect on cardiac event-free survival in patients with HF.

Depressive symptoms and poor social support have a synergistic effect on event-free survival in patients with heart failure

BACKGROUND Depressive symptoms and poor social support are predictors of increased morbidity and mortality in patients with heart failure (HF). However, the combined contribution of depressive symptoms and social support event-free survival of patients with HF has not been examined. OBJECTIVE To compare event-free survival in 4 groups of patients with HF stratified by depressive symptoms and perceived social support (PSS). METHOD A total of 220 patients completed the Beck Depression Inventory-II and the Multidimensional Perceived Social Support Scale and were followed for up to 4 years to collect data on death and hospitalizations. RESULTS Depressive symptoms (hazard ratio = 1.73, P = .008) and PSS (hazard ratio = 1.51, P = .048) were independent predictors of event-free survival. Depressed patients with low PSS had 2.1 times higher risk of events than non-depressed patients with high PSS (P = .003). CONCLUSION Depressive symptoms and poor social support had a negative additive effect on event-free survival in patients with HF.

Coexisting anxiety and depressive symptoms in patients with heart failure.

Background: Among patients with heart failure (HF), anxiety symptoms may co-exist with depressive symptoms. However, the extent of overlap and risk factors for anxiety symptoms have not been thoroughly described. Purpose: The aim of this study was to describe the coexistence of anxiety and depressive symptoms, and to determine the predictors of anxiety symptoms in patients with HF. Methods: The sample consisted of 556 outpatients with HF (34% female, 62±12 years, 54% New York Heart Association (NYHA) class III/IV) enrolled in a multicenter HF quality of life registry. Anxiety symptoms were assessed with the Brief Symptom Inventory-anxiety subscale. Depressive symptoms were measured with the Beck Depression Inventory-II (BDI). We used a cut-point of 0.35 to categorize patients as having anxiety symptoms or no anxiety symptoms. Logistic regression was used to determine whether age, gender, minority status, educational level, functional status, comorbidities, depressive symptoms, and antidepressant use were predictors of anxiety symptoms. Results: One-third of patients had both depressive and anxiety symptoms. There was a dose-response relationship between depressive symptoms and anxiety symptoms; higher levels of depressive symptoms were associated with a higher level of anxiety symptoms. Younger age (odds ratio (OR)= 0.97, p=0.004, 95% confidence interval (CI) 0.95–0.99) and depressive symptoms (OR =1.25, p<0.001, 95% CI 1.19–1.31) were independent predictors of anxiety symptoms. Conclusions: Patients with HF and depressive symptoms are at high risk for experiencing anxiety symptoms. Clinicians should assess these patients for comorbid anxiety symptoms. Research is needed to test interventions for both depressive and anxiety symptoms.

The Association of Co-morbid Symptoms of Depression and Anxiety With All-Cause Mortality and Cardiac Rehospitalization in Patients With Heart Failure

BACKGROUND Patients with heart failure (HF) experience multiple psychologic symptoms. Depression and anxiety are independently associated with survival. Whether co-morbid symptoms of anxiety and depression are associated with outcomes in patients with HF is unknown. OBJECTIVE To determine whether co-morbid symptoms of depression and anxiety are associated with all-cause mortality or rehospitalization for cardiac causes in patients with HF. METHOD A total of 1260 patients with HF participated in this study. Cox regression analysis was used to determine whether co-morbid symptoms of depression and anxiety independently predicted all-cause mortality and cardiac rehospitalization. Anxiety and depression were treated first as continuous-level variables, then as categorical variables using standard published cut points. Patients were then divided into 4 groups based on the presence of anxiety and depression symptoms. RESULTS When entered as a continuous variable, the interaction between anxiety and depression (hazard ratio = 1.02; 95% CI: 1.01-1.03; p = 0.002) was a significant predictor of all-cause mortality in patients with HF. When entered as a categorical variable, co-morbid symptoms of depression and anxiety (vs no symptoms or symptoms of anxiety or depression alone) independently predicted all-cause mortality (hazard ratio = 2.59; 95% CI: 1.49-4.49; p = 0.001). None of the psychologic variables was a predictor of cardiac rehospitalization in patients with HF whether using the continuous or categorical level of measurement. CONCLUSION To improve mortality outcomes in patients with HF, attention must be paid by health care providers to the assessment and management of co-morbid symptoms of depression and anxiety.

Cognitive behavioral therapy for depression in patients with heart failure: a critical review.

Depression is a significant problem in patients with heart failure. Cognitive behavioral therapy (CBT) has been proposed as a potential non-pharmacological treatment for depression in patients with heart failure. The purpose of this review is to examine the evidence for the use of CBT in treating depression and depressive symptoms in patients with cardiovascular illness. In six of the ten studied reviewed, researchers found that CBT reduced depressive symptoms; however, the limitations of the studies prevent wide generalization of the results. There is insufficient evidence to support the use of CBT for the treatment of depressive symptoms in patients with cardiovascular illness at this time. Large randomized, controlled trials that demonstrate the efficacy of CBT are needed before nurses routinely refer patients with heart failure to CBT for the purpose of improving depression or depressive symptoms.

Patient Perspectives About Depressive Symptoms in Heart Failure: A Review of the Qualitative Literature

Background:Scientists have systematically established the prevalence and the consequences of depressive symptoms in patients with heart failure (HF). However, a comprehensive understanding of patient perspectives about depressive symptoms, in combination with HF, has not been published. A patient-centered approach may support the design of interventions that are effective and acceptable to patients with HF and depressive symptoms. Objective:The aim of this study was to review qualitative findings about patient perspectives of contributing factors, associated symptoms, consequences, and self-care strategies used for depressive symptoms in HF. Methods:Qualitative studies were included if they were published between 2000 and 2012, if they were in English, and if they described emotional components about living with HF. Three electronic databases were searched using the key words heart failure, qualitative, and depression or psychosocial or stress or emotional. Results:Thirteen studies met the inclusion criteria. Patients with HF reported that financial stressors, overall poor health, past traumatic life experiences, and negative thinking contributed to depressive symptoms. The patients described cognitive-affective symptoms of depression and anxiety but not somatic symptoms of depression. Perceived consequences of depressive symptoms included hopelessness, despair, impaired social relationships, and a decreased ability to engage in HF self-care. Recommended management strategies consisted of enhanced social support and cognitive strategies. Conclusions:Depressive symptoms in patients with HF were associated with a number of contributing factors, including those not specifically related to their disease, and serious consequences that reduced their self-care ability. Nonpharmacological management approaches to depressive symptoms that include improved social support or cognitive interventions may be effective and acceptable strategies.

Depressive Symptoms and the Relationship of Inflammation to Physical Signs and Symptoms in Heart Failure Patients

BACKGROUND Depressive symptoms in patients with heart failure can affect the relationship between physical signs and symptoms and inflammation. OBJECTIVE To examine the relationship between soluble tumor necrosis factor receptor I and physical signs and symptoms and the effects of depressive symptoms on this relationship in patients with heart failure. METHODS Data on physical signs and symptoms (Symptom Status Questionnaire-Heart Failure), depressive symptoms (Beck Depression Inventory-II), and levels of the receptor (blood samples) were collected from 145 patients with heart failure. Data on the receptor were square root transformed to achieve normality. Patients were divided into 2 groups according to their scores for depressive symptoms (nondepressed <14 and depressed ≥14). Hierarchical multiple regression was used to analyze the data. RESULTS In the total sample, with controls for covariates, higher levels of the receptor were significantly related to more severe physical signs and symptoms (F = 7.915; P < .001). In subgroup analyses, with controls for covariates, levels of the receptor were significantly related to physical signs and symptoms only in the patients without depression (F = 3.174; P = .005). CONCLUSION Both depressive symptoms and inflammation should be considered along with physical signs and symptoms in patients with heart failure. Further studies are needed to determine the effects of improvement in inflammation on improvement in physical signs and symptoms, with consideration given to the effects of depressive symptoms.