Abstract
Knowledge of the distribution of risk factors for superficial thrombosis (SVT) in low-risk population is fundamental to improve the prevention of the disease in each individual and high-risk settings of patients. Exact frequency data for the low-risk population are scarce, but could be useful for optimal use of prophylactic strategies against venous thrombosis. Blood donors represent a low-risk population, because are healthier than the general population. The objective of this study was to assess the prevalence of vein thrombosis, particularly SVT, and associated risk factors in a low-risk population such as blood donors. In this multicentre cross-sectional study, donors from six Italian blood banks responded to a self-administered questionnaire. The enrolment lasted from 1st June 2017 to 30th July 2018. History of vein thrombosis was referred by 89 (0.76%) individuals, (49 men) with an age-dependent effect. The prevalence reached 2.9% in women and 0.8% in men aged ≥ 49 years, with a significant difference only for women. After controlling for potential confounders, a significant and independent association was found between a history of vein thrombosis and age (OR: 1.03, 95%CI 1.01–1.05), varicose veins (OR: 15.8, 95%CI 7.7–32.6), plaster cast/bed rest (OR: 2.3, 95% CI 1.0–5.3) and transfusion (OR: 5.1, 95% CI 1.3–19.5). This study shows that low-risk individuals share the same risk factors for SVT as patients in secondary care. It also suggests that transfusion confers an increased risk of SVT in healthy population.
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We would like to thank M.R.J. Vespa for English language editing and Dr. N. Di Renzo for helpful suggestions.
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EG, GLT, AO, AT conceived and designed the study; EG, GLT, AO, MM analysed and interpreted data; AO, LDM, NC, RD, GM, AT, GB, FC, PV, ADL collected data; EG, MM performed statistics; AO, LDM, NC, RD, GM, AT, GB recruited study materials or patients; EG made draft of the article or part of the article; EG, GLT, AO, MM critically revised the article for important intellectual content; EG, AO planned administrative, technical, or logistic support; EG is guarantor of the study; EG supervised the study.
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Grandone, E., Tiscia, G.L., Ostuni, A. et al. Anemone study: prevalence of risk factors for superficial vein thrombosis in a large Italian population of blood donors. J Thromb Thrombolysis 50, 689–696 (2020). https://doi.org/10.1007/s11239-020-02140-5
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DOI: https://doi.org/10.1007/s11239-020-02140-5