Venous thromboembolism (VTE; deep vein thrombosis and/or pulmonary embolism) is a well-established cause of morbidity and mortality in the medical and surgical patient populations. Clinical research in the prevention and treatment of VTE has been a dynamic field of study, with investigations into various treatment modalities ranging from mechanical prophylaxis to the direct oral anticoagulants. Aspirin has long been an inexpensive cornerstone of arterial vascular disease therapy, but its role in the primary or secondary prophylaxis of VTE has been debated. Risk-benefit tradeoffs between aspirin and anticoagulants have changed, in part due to advances in surgical technique and postoperative care, and in part due to the development of safe, easy-to-use oral anticoagulants. We review the proposed mechanisms in which aspirin may act on venous thrombosis, the evidence for aspirin use in the primary and secondary prophylaxis of VTE, and the risk of bleeding with aspirin as compared with anticoagulation.

Background: Depressive symptoms are common in patients with chronic kidney disease (CKD) and may stem from distress associated with CKD awareness. So far, no studies have examined this association. The objective of this study was to evaluate the association between awareness of CKD and depressive symptoms. Methods: We included adults with stages 1-4 CKD (estimated glomerular filtration rate 15-60 ml/min/1.73 m² or urine albumin-to-creatinine ratio ≥30 mg/g) using the National Health and Nutrition Examination Surveys from 2005 to 2010. Depressive symptoms were categorized as minimal (9-item Patient Health Questionnaire (PHQ-9) score 0-4), subthreshold (PHQ-9 score 5-14) and severe (PHQ-9 score ≥15). Participants were classified as aware of CKD if they answered yes to the question: ‘Have you ever been told you have weak or failing kidneys?' Multivariable logistic regression was used to identify variables independently associated with at least subthreshold depressive symptoms (PHQ-9 ≥5). Results: In 2,500 participants with CKD, the weighted prevalence was 21.4% for subthreshold and 3.1% for severe depressive symptoms. The weighted prevalence of CKD awareness was 6.4%. Independent predictors of depressive symptoms included younger age, female gender, never been married, less than high-school education, annual family income <$20,000, obesity, smoking, cardiovascular comorbidity and mental health visit in the past year. CKD awareness was independently associated with a 1.66 greater odds of depressive symptoms (95% CI 1.01-2.74, p < 0.05). Conclusions: Awareness of CKD is significantly associated with depressive symptoms independent of known confounding factors. Future studies should examine mediators of this association, especially in light of national efforts to promote CKD awareness.

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