1
|
Dicks AB, Moussallem E, Stanbro M, Walls J, Gandhi S, Gray BH. A Comprehensive Review of Risk Factors and Thrombophilia Evaluation in Venous Thromboembolism. J Clin Med 2024; 13:362. [PMID: 38256496 PMCID: PMC10816375 DOI: 10.3390/jcm13020362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 12/29/2023] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
Venous thromboembolism (VTE), which encompasses deep vein thrombosis (DVT) and pulmonary embolism (PE), is a significant cause of morbidity and mortality worldwide. There are many factors, both acquired and inherited, known to increase the risk of VTE. Most of these result in increased risk via several common mechanisms including circulatory stasis, endothelial damage, or increased hypercoagulability. Overall, a risk factor can be identified in the majority of patients with VTE; however, not all risk factors carry the same predictive value. It is important for clinicians to understand the potency of each individual risk factor when managing patients who have a VTE or are at risk of developing VTE. With this, many providers consider performing a thrombophilia evaluation to further define a patient's risk. However, guidance on who to test and when to test is controversial and not always clear. This comprehensive review attempts to address these aspects/concerns by providing an overview of the multifaceted risk factors associated with VTE as well as examining the role of performing a thrombophilia evaluation, including the indications and timing of performing such an evaluation.
Collapse
Affiliation(s)
- Andrew B. Dicks
- Department of Vascular Surgery, Prisma Health, University of South Carolina School of Medicine—Greenville, Greenville, SC 29601, USA; (E.M.); (M.S.); (S.G.); (B.H.G.)
| | - Elie Moussallem
- Department of Vascular Surgery, Prisma Health, University of South Carolina School of Medicine—Greenville, Greenville, SC 29601, USA; (E.M.); (M.S.); (S.G.); (B.H.G.)
| | - Marcus Stanbro
- Department of Vascular Surgery, Prisma Health, University of South Carolina School of Medicine—Greenville, Greenville, SC 29601, USA; (E.M.); (M.S.); (S.G.); (B.H.G.)
| | - Jay Walls
- Department of Hematology, Prisma Health, University of South Carolina School of Medicine—Greenville, Greenville, SC 29601, USA;
| | - Sagar Gandhi
- Department of Vascular Surgery, Prisma Health, University of South Carolina School of Medicine—Greenville, Greenville, SC 29601, USA; (E.M.); (M.S.); (S.G.); (B.H.G.)
| | - Bruce H. Gray
- Department of Vascular Surgery, Prisma Health, University of South Carolina School of Medicine—Greenville, Greenville, SC 29601, USA; (E.M.); (M.S.); (S.G.); (B.H.G.)
| |
Collapse
|
2
|
Shekarchian S, Notten P, Barbati ME, Van Laanen J, Piao L, Nieman F, Razavi MK, Lao M, Mees B, Jalaie H. Development of a prediction model for DVT in a retrospective cohort of suspected DVT patients in primary care. J Vasc Surg Venous Lymphat Disord 2022; 10:1028-1036.e3. [DOI: 10.1016/j.jvsv.2022.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 04/12/2022] [Indexed: 11/15/2022]
|
3
|
D'Apolito M, Ariano A, D'Andrea G, Tiscia G, Santacroce R, Maffione AB, Margaglione M. Identification of the novel G250R variant indicates a role for Thrombomodulin in modulating the risk for venous thromboembolism. Thromb Haemost 2022; 122:1827-1832. [PMID: 35436795 DOI: 10.1055/a-1827-7109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Thrombomodulin displays anticoagulant properties through thrombin binding and protein C activation. In close relatives who had a history of recurrent VTE, a missense variant (G250R) in the EGF-1 domain was identified. In an asymptomatic 250R carrier, higher thrombin generation plasma values were found. Evaluation of cells transfected with the wild-type or the mutant construct using imaging technologies and flow cytometry provided evidences that the 250R variant significantly decreased protein localization on cell membrane. The different pattern of cell distribution suggested that the 250R variant is not able to sufficiently target the plasma membrane. Present findings add information to characterize protein structure-function relationships, further suggesting that misfolding of the protein modulates the expression of mature protein. Functional analyses of the 250R variant increase our understanding of the role of Thrombomodulin in coagulation and support the hypothesis that gene variants reducing protein functionality cause deficiency and behave as a thrombophilic risk factor.
Collapse
Affiliation(s)
- Maria D'Apolito
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Anastasia Ariano
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Giovanna D'Andrea
- Genetica Medica - Scienze Biomediche, Università di Foggia, Foggia, Italy
| | - Giovanni Tiscia
- Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Rosa Santacroce
- Genetica Medica - Scienze Biomediche, Università di Foggia, Foggia, Italy
| | - Angela Bruna Maffione
- Human Anatomy, Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Maurizio Margaglione
- Clinical and Experimentale Medicine, Medical Genetics, University of Foggia, Foggia, Foggia, Italy
| |
Collapse
|
4
|
Abstract
Pulmonary embolism is a common and potentially fatal cardiovascular disorder that must be promptly diagnosed and treated. The diagnosis, risk assessment, and management of pulmonary embolism have evolved with a better understanding of efficient use of diagnostic and therapeutic options. The use of either clinical probability adjusted or age adjusted D-dimer interpretation has led to a reduction in diagnostic imaging to exclude pulmonary embolism. Direct oral anticoagulation therapies are safe, effective, and convenient treatments for most patients with acute venous thromboembolism, with a lower risk of bleeding than vitamin K antagonists. These oral therapeutic options have opened up opportunities for safe outpatient management of pulmonary embolism in selected patients. Recent clinical trials exploring the use of systemic thrombolysis in intermediate to high risk pulmonary embolism suggest that this therapy should be reserved for patients with evidence of hemodynamic compromise. The role of low dose systemic or catheter directed thrombolysis in other patient subgroups is uncertain. After a diagnosis of pulmonary embolism, all patients should be assessed for risk of recurrent venous thromboembolism to guide duration of anticoagulation. Patients with a venous thromboembolism associated with a strong, transient, provoking risk factor can safely discontinue anticoagulation after three months of treatment. Patients with an ongoing strong risk factor, such as cancer, or unprovoked events are at increased risk of recurrent events and should be considered for extended treatment. The use of a risk prediction score can help to identify patients with unprovoked venous thromboembolism who can benefit from extended duration therapy. Despite major advances in the management of pulmonary embolism, up to half of patients report chronic functional limitations. Such patients should be screened for chronic thromboembolic pulmonary hypertension, but only a small proportion will have this as the explanation of their symptoms. In the remaining patients, future studies are needed to understand the pathophysiology and explore interventions to improve quality of life.
Collapse
Affiliation(s)
- Lisa Duffett
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- Department of Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Lana A Castellucci
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- Department of Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Melissa A Forgie
- Department of Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| |
Collapse
|
5
|
Tavares V, Pinto R, Assis J, Pereira D, Medeiros R. Venous thromboembolism GWAS reported genetic makeup and the hallmarks of cancer: Linkage to ovarian tumour behaviour. Biochim Biophys Acta Rev Cancer 2020; 1873:188331. [DOI: 10.1016/j.bbcan.2019.188331] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/01/2019] [Accepted: 11/01/2019] [Indexed: 12/14/2022]
|
6
|
Nascimento CMDB, Machado AMN, Guerra JCDC, Zlotnik E, Campêlo DHC, Kauffman P, Waksman H, Wolosker N, Podgaec S, Hamerschlak N. Consensus on the investigation of thrombophilia in women and clinical management. Einstein (Sao Paulo) 2019; 17:eAE4510. [PMID: 31432891 PMCID: PMC6707753 DOI: 10.31744/einstein_journal/2019ae4510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 01/21/2019] [Indexed: 12/04/2022] Open
Abstract
Objective To standardize the investigation and clinical management of women with laboratory and/or clinical abnormalities suggestive of thrombophilia, in order to optimize antithrombotic approach and indication of laboratory tests. Methodology A discussion was carried out among 107 physicians (gynecologists/obstetricians, hematologists and vascular surgeons) present at a forum held at the Hospital Israelita Albert Einstein, in São Paulo (SP), Brazil. As a minimum criterion, 80% agreement was established in the voting to each recommendation of conduct in the final document. The cases in which there was agreement below 80% were discussed again, reaching a consensual agreement of conduct for the document writing. Conclusion The standardization of an institutional consensus of suggestions of clinical approach contributes to a better management of the group to be evaluated and minimizes risks of intercurrent events. This was the first national consensus on the investigation of thrombophilia in women.
Collapse
Affiliation(s)
| | | | | | | | | | - Paulo Kauffman
- Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Hilton Waksman
- Hospital Israelita Albert Einstein, São Paulo, SP, Brazil
| | | | - Sérgio Podgaec
- Hospital Israelita Albert Einstein, São Paulo, SP, Brazil
| | | |
Collapse
|
7
|
Suchon P, Resseguier N, Ibrahim M, Robin A, Venton G, Barthet MC, Brunet D, Saut N, Alessi MC, Trégouët DA, Morange PE. Common Risk Factors Add to Inherited Thrombophilia to Predict Venous Thromboembolism Risk in Families. TH Open 2019; 3:e28-e35. [PMID: 31249979 PMCID: PMC6524901 DOI: 10.1055/s-0039-1677807] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 12/21/2018] [Indexed: 12/02/2022] Open
Abstract
The clinical venous thromboembolism (VTE) pattern often shows wide heterogeneity within relatives of a VTE-affected family, although they carry the same thrombophilia defect. It is then mandatory to develop additional tools for assessing VTE risk in families with thrombophilia. This study aims to assess whether common environmental and genetic risk factors for VTE contribute to explain this heterogeneity. A total of 2,214 relatives from 651 families with known inherited thrombophilia were recruited at the referral center for thrombophilia in Marseilles, France, from 1986 to 2013. A thrombophilia screening was systematically performed in all included relatives. According to the severity of the thrombophilia defect, individuals were split into three groups: no familial defect, mild thrombophilia, and severe thrombophilia. In addition, common genetic factors (ABO blood group and 11 polymorphisms selected on the basis of their association with VTE in the general population) were genotyped. Furthermore, body mass index and smoking were collected. VTE incidence was 1.74, 3.64, and 6.40 per 1,000 person-years in individuals with no familial defect, mild thrombophilia, and severe thrombophilia, respectively. Five common risk factors were associated with VTE in this population: obesity, smoking, ABO blood group, and
F11
_rs2036914 and
FGG
_rs2066865 polymorphisms. These common factors were then included into a three-level risk score. The score was highly efficient for assessing VTE risk in mild thrombophilia patients by identifying two groups with different VTE risk; individuals with low score had the same risk as individuals with no familial defect whereas individuals with high score had the same risk as individuals with severe thrombophilia. An overall score including the five items plus the thrombophilia status was built and displayed an area under the receiver operating characteristic curve of 0.702 for discriminating VTE and non-VTE relatives. In conclusion, integrating common environmental and genetic risk factors improved VTE risk assessment in relatives from families with thrombophilia.
Collapse
Affiliation(s)
- Pierre Suchon
- Laboratory of Haematology, La Timone Hospital, Marseille, France.,C2VN, Aix Marseille University, Marseille, France
| | - Noemie Resseguier
- Support Unit for Clinical Research and Economic Evaluation, Assistance Publique - Hôpitaux de Marseille, Marseille, France.,EA3279 Self-perceived Health Assessment Research Unit, Aix-Marseille University, Marseille, France
| | - Manal Ibrahim
- Laboratory of Haematology, La Timone Hospital, Marseille, France.,C2VN, Aix Marseille University, Marseille, France
| | - Alexia Robin
- Laboratory of Haematology, La Timone Hospital, Marseille, France
| | - Geoffroy Venton
- Aix-Marseille Université, TAGC Campus de Luminy, Marseille, France.,Department of Hematology and Cellular Therapy, AP-HM, Conception Hospital, Marseille, France
| | | | - Dominique Brunet
- Laboratory of Haematology, La Timone Hospital, Marseille, France
| | - Noemie Saut
- Laboratory of Haematology, La Timone Hospital, Marseille, France
| | - Marie-Christine Alessi
- Laboratory of Haematology, La Timone Hospital, Marseille, France.,C2VN, Aix Marseille University, Marseille, France
| | - David A Trégouët
- Bordeaux Population Health Research Center, University of Bordeaux, Bordeaux, France
| | - Pierre E Morange
- Laboratory of Haematology, La Timone Hospital, Marseille, France.,C2VN, Aix Marseille University, Marseille, France
| |
Collapse
|
8
|
Pannucci CJ. Venous Thromboembolism in Aesthetic Surgery: Risk Optimization in the Preoperative, Intraoperative, and Postoperative Settings. Aesthet Surg J 2019; 39:209-219. [PMID: 29846505 DOI: 10.1093/asj/sjy138] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The purpose of this Continuing Medical Education (CME) article is to provide a framework for practicing surgeons to conceptualize and quantify venous thromboembolism risk among the aesthetic and ambulatory surgery population. The article provides a practical approach to identify and minimize venous thromboembolism risk in the preoperative, intraoperative, and postoperative settings.
Collapse
Affiliation(s)
- Christopher J Pannucci
- Division of Plastic Surgery, Division of Health Services Research, at the University of Utah, Salt Lake City, UT
| |
Collapse
|
9
|
Gran OV, Brækkan SK, Hansen JB. Prothrombotic genotypes and risk of venous thromboembolism in cancer. Thromb Res 2018; 164 Suppl 1:S12-S18. [DOI: 10.1016/j.thromres.2017.12.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 12/29/2017] [Indexed: 12/21/2022]
|
10
|
Suchon P, Trégouët DA, Morange PE. Genetics of Venous Thrombosis: update in 2015. Thromb Haemost 2017; 114:910-9. [DOI: 10.1160/th15-05-0410] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 07/14/2015] [Indexed: 11/05/2022]
Abstract
SummaryVenous thrombosis (VT) is a common multifactorial disease with a genetic component that was first suspected nearly 60 years ago. In this review, we document the genetic determinants of the disease, and update recent findings delivered by the application of high-throughput genotyping and sequencing technologies. To date, 17 genes have been robustly demonstrated to harbour genetic variations associated with VT risk: ABO, F2, F5, F9, F11, FGG, GP6, KNG1, PROC, PROCR, PROS1, SERPINC1, SLC44A2, STXBP5, THBD, TSPAN15 and VWF. The common polymorphisms are estimated to account only for a modest part (~5 %) of the VT heritability. Much remains to be done to fully disentangle the exact genetic (and epigenetic) architecture of the disease. A large suite of powerful tools and research strategies can be deployed on the large collections of patients that have already been assembled (and additional are ongoing).
Collapse
|
11
|
Li X, Ohlsson H, Ji J, Sundquist J, Sundquist K, Zöller B. Family history of venous thromboembolism as a risk factor and genetic research tool. Thromb Haemost 2017; 114:890-900. [DOI: 10.1160/th15-04-0306] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 07/03/2015] [Indexed: 12/25/2022]
Abstract
SummaryFamilial clustering of venous thromboembolism (VTE) was described as far back as 1905 by Briggs. Although Egeberg discovered inherited deficiency of antithrombin in 1965, it was not until Dahlback discovered resistance to activated protein C in 1993 that it became clear that genetic factors are common risk factors of VTE. Several genes have been linked to familial aggregation of VTE and genome-wide association studies have found several novel gene loci. Still, it has been estimated that much of the heritability for VTE remains to be discovered. Family history (FH) of VTE is therefore still important to determine whether a patient has an increased genetic risk of VTE. FH has the potential to represent the sum of effects and interactions between environmental and genetic factors. In this article the design, methodology, results, clinical and genetic implications of FH studies of VTE are reviewed. FH in first-degree relatives (siblings and/or parents) is associated with a 2–3 times increased familial relative risk (FRR). However, the FRR is dependent on age, number of affected relatives, and presentation of VTE (provoked/unprovoked). Especially high familial risks are observed in individuals with two or more affected siblings (FFR> 50). However, the familial risk for recurrent VTE is much lower or non-significant. Moreover, FH of VTE appears mainly to be important for venous diseases (i. e. VTE and varicose veins). The familial associations with other diseases are weaker. In conclusion, FH of VTE is an important research tool and a clinically potential useful risk factor for VTE.
Collapse
|
12
|
Rossi E, Ciminello A, Za T, Betti S, Leone G, Stefano V. In families with inherited thrombophilia the risk of venous thromboembolism is dependent on the clinical phenotype of the proband. Thromb Haemost 2017; 106:646-54. [DOI: 10.1160/th11-02-0080] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Accepted: 07/08/2011] [Indexed: 11/05/2022]
Abstract
SummaryThe utility of laboratory investigation of relatives of individuals with inherited thrombophilia is uncertain. To assess the risk of venous thromboembolism (VTE) among the carriers, we investigated a family cohort of 1,720 relatives of probands with thrombophilia who were evaluated because of VTE (n=1,088), premature arterial thrombosis (n=113), obstetric complication (n=257), or universal screening before pregnancy or hormonal contraception or therapy (n=262); 968 relatives were carriers of thrombophilia. A first deep venous thrombosis (DVT) occurred in 44 carriers and 10 non-carriers during 37,688 and 29,548 observationyears from birth, respectively. The risk of DVT among the carriers compared with non-carriers was estimated as a hazard ratio (HR). If the proband had VTE and factor V Leiden (FVL) and/or prothrombin (PT)20210A, the HR for DVT was 2.77 (95%CI 1.21–4.82) in the carriers overall, and 5.54 (95%CI 3.20–187.00) in those homozygous or double heterozygous for FVL and PT20210A. If the proband had VTE and a deficiency of antithrombin (AT), protein C or S, the HR for DVT was 5.14 (95%CI 0.88–10.03) in the carriers overall, and 12.86 (95%CI 2.46–59.90) in those with AT deficiency. No increase in risk was found among the carriers who were relatives of the probands who were evaluated for reasons other than VTE. In conclusion, familial investigation for inherited thrombophilia seems justified for probands with previous VTE, but appears of doubtful utility for the relatives of probands without VTE. This should be taken with caution regarding families with deficiency of natural anticoagulants, given the low number of cases analysed.
Collapse
|
13
|
Margaglione M. Family history of VTE: An easy tool to score the individual risk. Thromb Haemost 2017; 109:361-2. [DOI: 10.1160/th13-01-0039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 01/15/2013] [Indexed: 11/05/2022]
|
14
|
Prandoni P, Prins M, Ghirarduzzi A, Pengo V, Sartori M, Ugolotti M, Bracco A, Veropalumbo M, Noventa F, Lensing A. Family history of venous thrombosis or sudden death as a risk factor for venous thromboembolism. Thromb Haemost 2017; 107:1191-2. [DOI: 10.1160/th11-12-0845] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 03/18/2012] [Indexed: 11/05/2022]
|
15
|
Affiliation(s)
- Jean M Connors
- From Brigham and Women's Hospital and Harvard Medical School, Boston
| |
Collapse
|
16
|
Zarrouk M, Salim S, Elf J, Gottsäter A, Acosta S. Testing for thrombophilia in mesenteric venous thrombosis - Retrospective original study and systematic review. Best Pract Res Clin Gastroenterol 2017; 31:39-48. [PMID: 28395787 DOI: 10.1016/j.bpg.2016.11.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 11/02/2016] [Accepted: 11/07/2016] [Indexed: 01/31/2023]
Abstract
The aim was to perform a local study of risk factors and thrombophilia in mesenteric venous thrombosis (MVT), and to review the literature concerning thrombophilia testing in MVT. Patients hospitalized for surgical or medical treatment of MVT at our center 2000-2015. A systematic review of observational studies was performed. In the local study, the most frequently identified risk factor was Factor V Leiden mutation. The systematic review included 14 original studies. The highest pooled percentage of any inherited thrombophilic factor were: Factor V Leiden mutation 9% (CI 2.9-16.1), prothrombin gene mutation 7% (CI 2.7-11.8). The highest pooled percentage of acquired thrombophilic factors were JAK2 V617F mutation 14% (CI -1.9-28.1). The wide range of frequency of inherited and acquired thrombophilic factors in different populations indicates the necessity to relate these factors to background population based data in order to estimate their overrepresentation in MVT. There is a need to develop guidelines for when and how thrombophilia testing should be performed in MVT.
Collapse
Affiliation(s)
- M Zarrouk
- Lund University, Department of Vascular Diseases, Skåne University Hospital, S-205 02 Malmö, Sweden.
| | - S Salim
- Lund University, Department of Vascular Diseases, Skåne University Hospital, S-205 02 Malmö, Sweden.
| | - J Elf
- Lund University, Department of Vascular Diseases, Skåne University Hospital, S-205 02 Malmö, Sweden.
| | - A Gottsäter
- Lund University, Department of Vascular Diseases, Skåne University Hospital, S-205 02 Malmö, Sweden.
| | - S Acosta
- Lund University, Department of Vascular Diseases, Skåne University Hospital, S-205 02 Malmö, Sweden.
| |
Collapse
|
17
|
Sindet-Pedersen C, Bruun Oestergaard L, Gundlund A, Fosbøl EL, Aasbjerg K, Langtved Pallisgaard J, Gislason G, Torp-Pedersen C, Bjerring Olesen J. Familial Clustering of Venous Thromboembolism - A Danish Nationwide Cohort Study. PLoS One 2016; 11:e0169055. [PMID: 28033406 PMCID: PMC5199093 DOI: 10.1371/journal.pone.0169055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 12/09/2016] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Identification of risk factors for venous thromboembolism (VTE) is of utmost importance to improve current prophylactic regimes and treatment guidelines. The extent to which a family history contributes to the risk of VTE needs further exploration. OBJECTIVES To examine the relative rate of VTE in first-degree relatives compared with the general population. METHODS By crosslinking Danish nationwide registries we identified patients with VTE between 1978 and 2012, and their familial relations. The first member in a family to acquire VTE was defined as the proband. All first-degree relatives to probands were followed from the VTE date of the proband and until an event (VTE), death, emigration, 100 year birthday or end of study: 31st of December 2012, whichever came first. The relative rate of VTE was estimated by standardized incidence ratios (SIR) using time-dependent Poisson regression models, with the general population as a fixed reference. RESULTS We identified 70,767 children of maternal probands, 66,065 children of paternal probands, and 29,183 siblings to sibling probands. Having a maternal proband or a paternal proband were associated with a significantly increased VTE rate of 2.15 (CI: 2.00-2.30) and 2.06 (CI: 1.92-2.21), respectively. The highest estimate of VTE was observed among siblings (adjusted SIR of 2.60 [CI: 2.38-2.83]). Noteworthy, the rate of VTE increased for all first-degree relatives when the proband was diagnosed with VTE in a young age (≤ 50 years). CONCLUSION A family history of VTE was associated with a significantly increased rate of VTE among first-degree relatives compared with the general population.
Collapse
Affiliation(s)
- Caroline Sindet-Pedersen
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Hellerup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark
- * E-mail:
| | - Louise Bruun Oestergaard
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Hellerup, Denmark
- Institute of Health, Science and Technology, Aalborg University, Aalborg, Denmark
| | - Anna Gundlund
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Hellerup, Denmark
| | - Emil Loldrup Fosbøl
- The Danish Heart Foundation, Copenhagen K, Copenhagen, Denmark
- Department of Cardiology, Copenhagen University Hospital Rigshospitalet, Copenhagen Ø, Denmark
| | - Kristian Aasbjerg
- Institute of Health, Science and Technology, Aalborg University, Aalborg, Denmark
- Department of Ophthalmology, Aalborg University Hospital, Aalborg, Denmark
| | - Jannik Langtved Pallisgaard
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Hellerup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark
| | - Gunnar Gislason
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Hellerup, Denmark
- Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen N, Denmark
- The Danish Heart Foundation, Copenhagen K, Copenhagen, Denmark
- The National Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - Christian Torp-Pedersen
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Hellerup, Denmark
- Institute of Health, Science and Technology, Aalborg University, Aalborg, Denmark
| | - Jonas Bjerring Olesen
- Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte, Hellerup, Denmark
| |
Collapse
|
18
|
Abstract
Thrombophilias are hereditary and/or acquired conditions that predispose patients to thrombosis. Testing for thrombophilia is commonly performed in patients with venous thrombosis and their relatives; however such testing usually does not provide information that impacts management and may result in harm. This manuscript, initiated by the Anticoagulation Forum, provides clinical guidance for thrombophilia testing in five clinical situations: following 1) provoked venous thromboembolism, 2) unprovoked venous thromboembolism; 3) in relatives of patients with thrombosis, 4) in female relatives of patients with thrombosis considering estrogen use; and 5) in female relatives of patients with thrombosis who are considering pregnancy. Additionally, guidance is provided regarding the timing of thrombophilia testing. The role of thrombophilia testing in arterial thrombosis and for evaluation of recurrent pregnancy loss is not addressed. Statements are based on existing guidelines and consensus expert opinion where guidelines are lacking. We recommend that thrombophilia testing not be performed in most situations. When performed, it should be used in a highly selective manner, and only in circumstances where the information obtained will influence a decision important to the patient, and outweigh the potential risks of testing. Testing should not be performed during acute thrombosis or during the initial (3-month) period of anticoagulation.
Collapse
Affiliation(s)
- Scott M Stevens
- Department of Medicine, Intermountain Medical Center, 5121 Cottonwood Street, Murray, UT, 84157-7000, USA.
- Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA.
| | - Scott C Woller
- Department of Medicine, Intermountain Medical Center, 5121 Cottonwood Street, Murray, UT, 84157-7000, USA
- Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA
| | - Kenneth A Bauer
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Raj Kasthuri
- Johns Hopkins Comprehensive Hemophilia Treatment Center, Baltimore, MD, USA
| | - Mary Cushman
- Department of Medicine, Cardiovascular Research Institute of Vermont, University of Vermont, Burlington, VT, USA
| | - Michael Streiff
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Wendy Lim
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - James D Douketis
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| |
Collapse
|
19
|
Zöller B, Ohlsson H, Sundquist J, Sundquist K. Family history of venous thromboembolism is a risk factor for venous thromboembolism in combined oral contraceptive users: a nationwide case-control study. Thromb J 2015; 13:34. [PMID: 26500457 PMCID: PMC4617955 DOI: 10.1186/s12959-015-0065-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 07/22/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The aim was to assess the risk of venous thromboembolism (VTE) associated with use of combined oral contraceptives (COCs) in women with a family history of VTE. METHODS The study is a Swedish nationwide case-control study based on the Multigeneration register, the Swedish Hospital Discharge Register, the Outpatient Care Register, and the Swedish Prescribed Drug Register. Cases (n = 2,311) were non-pregnant Swedish women aged 15-49 with first VTE diagnoses between January 2006 and December 2010. Five controls without VTE were matched to each case on age and education level. Conditional logistic regression examined the associations with VTE with determination of odds ratio (OR) for first VTE diagnosis. Effect modification was assessed by interaction testing. RESULTS Both among controls (14.6 % vs. 4.5 %; p < 0.0001) and cases (27.2 % vs. 8.8 %; p < 0.0001) COC use was more common in women without a family history of VTE compared with women with a family history of VTE. In a multivariate conditional logistic regression model the OR for VTE was 2.53 (95 % CI 2.23-2.87) for COC users and 2.38 (2.09-2.71) for individuals with a family history of VTE. The OR for VTE for COC users with a family history of VTE was 6.02 (5.02-7.22). There was no significant interaction between family history of VTE and COC use (OR 0.92, 0.57-1.46). CONCLUSIONS Family history of VTE is a risk factor for VTE in women using COCs. The low prevalence of COC use among women with a family history of VTE suggests that family history of VTE is considered when COCs are prescribed in Sweden. The present study may therefore even underestimate the importance of family history of VTE. The lack of interaction indicates that the risk of COC use in women with family history of VTE is determined by the product of the ORs for family history and COC use.
Collapse
Affiliation(s)
- Bengt Zöller
- Center for Primary Health Care Research, Lund University/Region Skåne, Skåne University Hospital, CRC, Building 28, Floor 11, Jan Waldenströms gata 35, S-205 02 Malmö, Sweden
| | - Henrik Ohlsson
- Center for Primary Health Care Research, Lund University/Region Skåne, Skåne University Hospital, CRC, Building 28, Floor 11, Jan Waldenströms gata 35, S-205 02 Malmö, Sweden
| | - Jan Sundquist
- Center for Primary Health Care Research, Lund University/Region Skåne, Skåne University Hospital, CRC, Building 28, Floor 11, Jan Waldenströms gata 35, S-205 02 Malmö, Sweden ; Stanford Prevention Research Center, Stanford University School of Medicine, Palo Alto, CA USA
| | - Kristina Sundquist
- Center for Primary Health Care Research, Lund University/Region Skåne, Skåne University Hospital, CRC, Building 28, Floor 11, Jan Waldenströms gata 35, S-205 02 Malmö, Sweden ; Stanford Prevention Research Center, Stanford University School of Medicine, Palo Alto, CA USA
| |
Collapse
|
20
|
Zöller B, Palmer K, Li X, Sundquist J, Sundquist K. Family history of venous thromboembolism and risk of hospitalized thromboembolism in cancer patients: A nationwide family study. Thromb Res 2015; 136:573-81. [DOI: 10.1016/j.thromres.2015.07.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2015] [Revised: 06/23/2015] [Accepted: 07/08/2015] [Indexed: 12/21/2022]
|
21
|
Bruzelius M, Bottai M, Sabater-Lleal M, Strawbridge RJ, Bergendal A, Silveira A, Sundström A, Kieler H, Hamsten A, Odeberg J. Predicting venous thrombosis in women using a combination of genetic markers and clinical risk factors. J Thromb Haemost 2015; 13:219-27. [PMID: 25472531 DOI: 10.1111/jth.12808] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 11/28/2014] [Indexed: 11/27/2022]
Abstract
BACKGROUND Family history of venous thromboembolism (VTE) has been suggested to be more useful in risk assessment than thrombophilia testing. OBJECTIVES We investigated established genetic susceptibility variants for association with VTE and evaluated a genetic risk score in isolation and combined with known trigger factors, including family history of VTE. PATIENTS/METHOD A total of 18 single nucleotide polymorphisms (SNPs) selected from the literature were genotyped in 2835 women participating in a Swedish nationwide case-control study (the ThromboEmbolism Hormone Study [TEHS]). Association with VTE was assessed by odds ratios (ORs) with 95% confidence interval (CI) using logistic regression. Clinical and genetic predictors that contributed significantly to the fit of the logistic regression model were included in the prediction models. SNP-SNP interactions were investigated and incorporated into the models if found significant. Risk scores were evaluated by calculating the area under the receiver-operating characteristics curve (AUC). RESULTS Seven SNPs (F5 rs6025, F2 rs1799963, ABO rs514659, FGG rs2066865, F11 rs2289252, PROC rs1799810 and KNG1 rs710446) with four SNP-SNP interactions contributed to the genetic risk score for VTE, with an AUC of 0.66 (95% CI, 0.64-0.68). After adding clinical risk factors, which included family history of VTE, the AUC reached 0.84 (95% CI, 0.82-0.85). The goodness of fit of the genetic and combined scores improved when significant SNP-SNP interaction terms were included. CONCLUSION Prediction of VTE in high-risk individuals was more accurate when a combination of clinical and genetic predictors with SNP-SNP interactions was included in a risk score.
Collapse
Affiliation(s)
- M Bruzelius
- Coagulation Unit, Hematology Centre, Karolinska University Hospital Solna, Stockholm, Sweden; Atherosclerosis Research Unit, Department of Medicine Solna, Karolinska Institutet (KI), Stockholm, Sweden
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
|
23
|
Affiliation(s)
- Boriana Guimicheva
- King's Thrombosis Centre; Department of Haematological Medicine; King's College Hospital NHS Foundation Trust; London UK
| | - Julia Czuprynska
- King's Thrombosis Centre; Department of Haematological Medicine; King's College Hospital NHS Foundation Trust; London UK
| | - Roopen Arya
- King's Thrombosis Centre; Department of Haematological Medicine; King's College Hospital NHS Foundation Trust; London UK
| |
Collapse
|
24
|
Aïssi D, Dennis J, Ladouceur M, Truong V, Zwingerman N, Rocanin-Arjo A, Germain M, Paton TA, Morange PE, Gagnon F, Trégouët DA. Genome-wide investigation of DNA methylation marks associated with FV Leiden mutation. PLoS One 2014; 9:e108087. [PMID: 25265411 PMCID: PMC4179266 DOI: 10.1371/journal.pone.0108087] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 08/12/2014] [Indexed: 12/31/2022] Open
Abstract
In order to investigate whether DNA methylation marks could contribute to the incomplete penetrance of the FV Leiden mutation, a major genetic risk factor for venous thrombosis (VT), we measured genome-wide DNA methylation levels in peripheral blood samples of 98 VT patients carrying the mutation and 251 VT patients without the mutation using the dedicated Illumina HumanMethylation450 array. The genome-wide analysis of 388,120 CpG probes identified three sites mapping to the SLC19A2 locus whose DNA methylation levels differed significantly (p<3 10−8) between carriers and non-carriers. The three sites replicated (p<2 10−7) in an independent sample of 214 individuals from five large families ascertained on VT and FV Leiden mutation among which 53 were carriers and 161 were non-carriers of the mutation. In both studies, these three CpG sites were also associated (2.33 10−11<p<3.02 10−4) with biomarkers of the Protein C pathway known to be influenced by the FV Leiden mutation. A comprehensive linkage disequilibrium (LD) analysis of the whole locus revealed that the original associations were due to LD between the FV Leiden mutation and a block of single nucleotide polymorphisms (SNP) located in SLC19A2. After adjusting for this block of SNPs, the FV Leiden mutation was no longer associated with any CpG site (p>0.05). In conclusion, our work clearly illustrates some promises and pitfalls of DNA methylation investigations on peripheral blood DNA in large epidemiological cohorts. DNA methylation levels at SLC19A2 are influenced by SNPs in LD with FV Leiden, but these DNA methylation marks do not explain the incomplete penetrance of the FV Leiden mutation.
Collapse
Affiliation(s)
- Dylan Aïssi
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
- INSERM, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
- ICAN Institute for Cardiometabolism and Nutrition, Paris, France
| | - Jessica Dennis
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Martin Ladouceur
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
- Centre de Recherches du CHUM, Montréal, Canada
| | - Vinh Truong
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Nora Zwingerman
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Ares Rocanin-Arjo
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
- INSERM, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
- ICAN Institute for Cardiometabolism and Nutrition, Paris, France
| | - Marine Germain
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
- INSERM, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
- ICAN Institute for Cardiometabolism and Nutrition, Paris, France
| | - Tara A. Paton
- The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Pierre-Emmanuel Morange
- Aix-Marseille University, UMR_S 1062, Nutrition Obesity and Risk of Thrombosis, Marseille, France
- INSERM, UMR_S 1062, Nutrition Obesity and Risk of Thrombosis, Marseille, France
- Laboratory of Haematology, La Timone Hospital, Marseille, France
| | - France Gagnon
- Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - David-Alexandre Trégouët
- Sorbonne Universités, UPMC Univ Paris 06, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
- INSERM, UMR_S 1166, Team Genomics & Pathophysiology of Cardiovascular Diseases, Paris, France
- ICAN Institute for Cardiometabolism and Nutrition, Paris, France
- * E-mail:
| |
Collapse
|
25
|
Abstract
Background Varicose veins (VVs) have been associated with venous thromboembolism (VTE), but whether these diseases share familial susceptibility has not been determined. This nationwide study aimed to determine whether VTE shares familial susceptibility with VVs. Methods and Results Swedish Multigeneration Register data for persons aged 0 to 76 years during the period 1964–2008 were linked to the Swedish Inpatient and Outpatient Registers. Familial risks (standardized incidence ratios [SIRs]) of VTE and VVs were examined in 2 ways (ie, bidirectionally): risk of VTE in subjects whose siblings had been diagnosed with VVs and risk of VVs in persons whose siblings had been diagnosed with VTE. The analyses were repeated for spouses to determine the importance of shared adult family environment. In total, 96 810 siblings had VVs and 87 564 had VTE. An increased risk of VTE was observed in persons whose siblings had VVs (SIR 1.30, 95% CI 1.26 to 1.33), whereas persons whose siblings had VTE had an increased risk of VVs (SIR 1.30, 95% CI 1.27 to 1.34). If 2 or more siblings were affected by VTE, the risk for VVs was 1.70 (95% CI 1.53 to 1.88). Conversely, if 2 or more siblings were affected by VVs, the risk for VTE was 1.52 (95% CI 1.38 to 1.67). In spouses of VTE patients, a minor increased risk of VVs was observed (SIR 1.05 for husbands, SIR 1.06 for wives). The risk of VTE in spouses of VV patients was similarly small (SIR 1.01 for husbands, SIR 1.05 for wives). Conclusions VVs and VTE share familial susceptibility. This novel finding suggests the existence of shared familial and possibly genetic factors.
Collapse
Affiliation(s)
- Bengt Zöller
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden (B., J.J., J.S., K.S.)
| | - Jianguang Ji
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden (B., J.J., J.S., K.S.)
| | - Jan Sundquist
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden (B., J.J., J.S., K.S.) Stanford Prevention Research Centre, Stanford University School of Medicine, Stanford, CA (J.S., K.S.)
| | - Kristina Sundquist
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden (B., J.J., J.S., K.S.) Stanford Prevention Research Centre, Stanford University School of Medicine, Stanford, CA (J.S., K.S.)
| |
Collapse
|
26
|
Couturaud F, Leroyer C, Tromeur C, Julian JA, Kahn SR, Ginsberg JS, Wells PS, Douketis JD, Mottier D, Kearon C. Factors that predict thrombosis in relatives of patients with venous thromboembolism. Blood 2014; 124:2124-30. [PMID: 25049279 DOI: 10.1182/blood-2014-03-559757] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
When counseling first-degree relatives of patients with venous thromboembolism (VTE), it is important to know whether factors other than thrombophilia influence their risk for thrombosis. We assessed the risk for VTE in 915 first-degree relatives of patients with provoked VTE, compared this with the risk in 1752 first-degree relatives of patients with unprovoked VTE, and then combined data from the 2 groups of relatives to identify predictors of thrombosis. There had been 123 VTEs in 2617 first-degree relatives (0.12 per 100 person-years). The risk for VTE in first-degree relatives was higher if the index cases had an unprovoked compared with a provoked VTE (odds ratio [OR], 2.38; 95% confidence interval [CI], 1.43-3.85), if the index case was younger (OR, 0.97 per year older; 95% CI, 0.96-0.99), and if an additional family member had VTE (OR, 2.71; 95% CI, 2.22-3.31). Among first-degree relatives of an index case with factor V Leiden or the prothrombin 20210A gene variant, the presence of these abnormalities also predicted thrombosis (OR, 4.42; 95% CI, 1.35-14.38). We conclude that thrombosis at a young age and unprovoked VTE predict VTE in first-degree relatives, and that the influence of these 2 factors is additive.
Collapse
|
27
|
Abstract
Background—
Venous thromboembolism (VTE) clusters in families, but the familial risk of VTE has not been determined among adoptees. The aim was to disentangle the contributions of genetic and environmental factors to the familial transmission of VTE.
Methods and Results—
The Swedish Multi-Generation Register was used to follow all Swedish-born adoptees born from 1932 to 2004 (n=80,214) between January 1, 1964, and December 31, 2010, for VTE. The risk of VTE was estimated in adoptees with ≥1 biological parent with VTE compared with adoptees without a biological parent with VTE. The risk of VTE was also estimated in adoptees with ≥1 adoptive parent with VTE compared with adoptees without an adoptive parent with VTE. Adoptees with ≥1 biological parent with VTE (n=137) were more likely to have VTE than adoptees without a biological parent with VTE (standardized incidence ratio) 1.51 (95% confidence interval, 1.27–1.79). The standardized incidence ratio for VTE was highest for adoptees with a biological parent diagnosed with VTE before the age of 50 years (standardized incidence ratio=2.03, 1.24–3.14). In contrast, adoptees with ≥1 adoptive parent with VTE (n=156) were not at increased risk of VTE (standardized incidence ratio=1.07, 0.91–1.25).
Conclusions—
These novel findings suggest that genetic factors make a stronger contribution to the familial transmission of VTE from parents to offspring than family environmental factors.
Collapse
Affiliation(s)
- Bengt Zöller
- From the Center for Primary Health Care Research, Lund University, Malmö, Sweden (B.Z., X.L., J.S., K.S.); and Stanford Prevention Research Centre, Stanford University School of Medicine, Stanford, CA (J.S., K.S.)
| | - Xinjun Li
- From the Center for Primary Health Care Research, Lund University, Malmö, Sweden (B.Z., X.L., J.S., K.S.); and Stanford Prevention Research Centre, Stanford University School of Medicine, Stanford, CA (J.S., K.S.)
| | - Jan Sundquist
- From the Center for Primary Health Care Research, Lund University, Malmö, Sweden (B.Z., X.L., J.S., K.S.); and Stanford Prevention Research Centre, Stanford University School of Medicine, Stanford, CA (J.S., K.S.)
| | - Kristina Sundquist
- From the Center for Primary Health Care Research, Lund University, Malmö, Sweden (B.Z., X.L., J.S., K.S.); and Stanford Prevention Research Centre, Stanford University School of Medicine, Stanford, CA (J.S., K.S.)
| |
Collapse
|
28
|
Linnemann B, Weingarz L, Schindewolf M, Schwonberg J, Weber A, Herrmann E, Lindhoff-Last E. Prevalence of established risk factors for venous thromboembolism according to age. J Vasc Surg Venous Lymphat Disord 2014; 2:131-9. [DOI: 10.1016/j.jvsv.2013.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 09/03/2013] [Accepted: 09/13/2013] [Indexed: 12/21/2022]
|
29
|
|
30
|
Zöller B, Ohlsson H, Sundquist J, Sundquist K. Family history of venous thromboembolism (VTE) and risk of recurrent hospitalization for VTE: a nationwide family study in Sweden. J Thromb Haemost 2014; 12:306-12. [PMID: 24382197 DOI: 10.1111/jth.12499] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Indexed: 11/27/2022]
Abstract
BACKGROUND Data concerning the importance of a family history of venous thromboembolism (VTE) for the risk of recurrent VTE are sparse. The aim of this nationwide study was to determine whether a family history of VTE is a risk factor for recurrent hospitalization for unprovoked VTE (deep vein thrombosis of the lower extremities or pulmonary embolism). METHODS We linked Multigeneration Register data on individuals aged 0-77 years to the Swedish nationwide Hospital Discharge Register data for the period 1987-2009 to compare the risk of hospitalization for unprovoked recurrent VTE among individuals with and without a parental or sibling history of VTE. We calculated hazard ratios (HRs) to determine the familial HR for recurrent hospitalization for VTE. RESULTS AND CONCLUSIONS The risk of recurrent VTE hospitalization was 1.20 (95% confidence interval [CI] 1.10-1.32) for individuals with affected parents, and 1.30 (95% CI 1.14-1.49) for those with affected siblings. The risk of recurrent VTE hospitalization in individuals with two affected parents was 1.92 (95% CI 1.44-2.58). There was an interaction between age at diagnosis of VTE and a family history of VTE, with a family history having a stronger effect on VTE risk in younger patients. We conclude that a family history of VTE is a modest risk factor for recurrent VTE hospitalization in Sweden.
Collapse
Affiliation(s)
- B Zöller
- Center for Primary Health Care Research, Region Skåne/Lund University, Malmö, Sweden
| | | | | | | |
Collapse
|
31
|
Zöller B, Li X, Ohlsson H, Sundquist J, Sundquist K. Age-and sex-specific seasonal variation of venous thromboembolism in patients with and without family history: a nationwide family study in Sweden. Thromb Haemost 2013; 110:1164-71. [PMID: 24048360 DOI: 10.1160/th13-04-0320] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 08/16/2013] [Indexed: 11/05/2022]
Abstract
Seasonal variation in venous thromboembolism (VTE) risk in individuals with familial predisposition to VTE has not been explored. This nationwide study aimed to determine whether there are age- and sex-specific seasonal differences in risk of hospitalisation of VTE among individuals with and without a family history of VTE. The Swedish Multi-Generation Register was linked to Hospital Discharge Register data for the period 1964-2010. Seasonal variation in first VTE events in 1987-2010 for individuals with and without a family history of VTE (siblings or parents) was determined by several independent methods. Stratified analyses were performed according to age, sex, and VTE subtype (pulmonary embolism [PE] or deep venous thrombosis [DVT]). Seasonal variation in VTE incidence, mostly with a peak during the winter, was observed in both sexes in individuals with and without family history with overall peak-to-low ratios (PLRs) of 1.15 and 1.21, respectively. The peak day was December 25 and February 1 for those with and without a family history of VTE, respectively. Seasonal variation was strongest among individuals aged >50 years. Among individuals aged 0-25 years with a family history, the peak for VTE was in July (PLR = 1.20). Significant seasonal variation was observed for PE and DVT with the exception of DVT among those with a family history (PLR = 1.01). In conclusion, our data support the presence of a modest seasonal variation of VTE among individuals with and without a family history of VTE. However, young age and family history may modify and attenuate the effect of season on VTE.
Collapse
Affiliation(s)
- Bengt Zöller
- Dr. Bengt Zöller, Center for Primary Health Care Research, CRC, Building 28, Floor 11, Jan Waldenströms gata 35, Skåne University Hospital, S-205 02 Malmö, Sweden, Tel.: +46 70 6691476, Fax: +46 40 391370, E-mail:
| | | | | | | | | |
Collapse
|
32
|
De Stefano V, Grandone E, Martinelli I. Recommendations for prophylaxis of pregnancy-related venous thromboembolism in carriers of inherited thrombophilia. Comment on the 2012 ACCP guidelines. J Thromb Haemost 2013; 11:1779-81. [PMID: 23789890 DOI: 10.1111/jth.12330] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Indexed: 11/30/2022]
Affiliation(s)
- V De Stefano
- Institute of Hematology, Department of Medical Sciences, Catholic University, Rome, Italy
| | | | | |
Collapse
|
33
|
Sonnevi K, Bergendal A, Adami J, Lärfars G, Kieler H. Self-reported family history in estimating the risk of hormone, surgery and cast related VTE in women. Thromb Res 2013; 132:164-9. [DOI: 10.1016/j.thromres.2013.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 05/31/2013] [Accepted: 06/02/2013] [Indexed: 01/11/2023]
|
34
|
Simone B, De Stefano V, Leoncini E, Zacho J, Martinelli I, Emmerich J, Rossi E, Folsom AR, Almawi WY, Scarabin PY, den Heijer M, Cushman M, Penco S, Vaya A, Angchaisuksiri P, Okumus G, Gemmati D, Cima S, Akar N, Oguzulgen KI, Ducros V, Lichy C, Fernandez-Miranda C, Szczeklik A, Nieto JA, Torres JD, Le Cam-Duchez V, Ivanov P, Cantu-Brito C, Shmeleva VM, Stegnar M, Ogunyemi D, Eid SS, Nicolotti N, De Feo E, Ricciardi W, Boccia S. Risk of venous thromboembolism associated with single and combined effects of Factor V Leiden, Prothrombin 20210A and Methylenetethraydrofolate reductase C677T: a meta-analysis involving over 11,000 cases and 21,000 controls. Eur J Epidemiol 2013; 28:621-47. [PMID: 23900608 DOI: 10.1007/s10654-013-9825-8] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Accepted: 07/02/2013] [Indexed: 12/16/2022]
Abstract
Genetic and environmental factors interact in determining the risk of venous thromboembolism (VTE). The risk associated with the polymorphic variants G1691A of factor V (Factor V Leiden, FVL), G20210A of prothrombin (PT20210A) and C677T of methylentetrahydrofolate reductase (C677T MTHFR) genes has been investigated in many studies. We performed a pooled analysis of case-control and cohort studies investigating in adults the association between each variant and VTE, published on Pubmed, Embase or Google through January 2010. Authors of eligible papers, were invited to provide all available individual data for the pooling. The Odds Ratio (OR) for first VTE associated with each variant, individually and combined with the others, were calculated with a random effect model, in heterozygotes and homozygotes (dominant model for FVL and PT20210A; recessive for C677T MTHFR). We analysed 31 databases, including 11,239 cases and 21,521 controls. No significant association with VTE was found for homozygous C677T MTHFR (OR: 1.38; 95 % confidence intervals [CI]: 0.98-1.93), whereas the risk was increased in carriers of either heterozygous FVL or PT20210 (OR = 4.22; 95 % CI: 3.35-5.32; and OR = 2.79;95 % CI: 2.25-3.46, respectively), in double heterozygotes (OR = 3.42; 95 %CI 1.64-7.13), and in homozygous FVL or PT20210A (OR = 11.45; 95 %CI: 6.79-19.29; and OR: 6.74 (CI 95 % 2.19-20.72), respectively). The stratified analyses showed a stronger effect of FVL on individuals ≤ 45 years (p value for interaction = 0.036) and of PT20210A in women using oral contraceptives (p-value for interaction = 0.045). In this large pooled analysis, inclusive of large studies like MEGA, no effect was found for C677T MTHFR on VTE; FVL and PT20210A were confirmed to be moderate risk factors. Notably, double carriers of the two genetic variants produced an impact on VTE risk significantly increased but weaker than previously thought.
Collapse
Affiliation(s)
- Benedetto Simone
- Institute of Public Health - Section of Hygiene, Department of Public Health, Università Cattolica del Sacro Cuore, L.go F.Vito 1, 00168, Rome, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
De Stefano V, Rossi E. Testing for inherited thrombophilia and consequences for antithrombotic prophylaxis in patients with venous thromboembolism and their relatives. A review of the Guidelines from Scientific Societies and Working Groups. Thromb Haemost 2013; 110:697-705. [PMID: 23846575 DOI: 10.1160/th13-01-0011] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 06/13/2013] [Indexed: 11/05/2022]
Abstract
The clinical penetrance of venous thromboembolism (VTE) susceptibility genes is variable, being lower in heterozygous carriers of factor V Leiden and prothrombin 20210A (mild thrombophilia), and higher in the rare carriers of deficiencies of antithrombin, protein C or S, and those with multiple or homozygous abnormalities (high-risk thrombophilia). The absolute risk of VTE is low, and the utility of laboratory investigation for inherited thrombophilia in patients with VTE and their asymptomatic relatives has been largely debated, leading to the production of several Guidelines from Scientific Societies and Working Groups. The risk for VTE largely depends on the family history of VTE. Therefore, indiscriminate search for carriers is of no utility, and targeted screening is potentially more fruitful. In patients with VTE inherited thrombophilia is not scored as a determinant of recurrence, playing a minor role in the decision of prolonging anticoagulation; indeed, a few guidelines consider testing worthwhile to identify carriers of high-risk thrombophilia, particularly those with a family history of VTE. The identification of the asymptomatic carrier relatives of the probands with VTE and thrombophilia could reduce cases of provoked VTE, offering them primary antithrombotic prophylaxis during risk situations. In most guidelines, this is considered justified only for relatives of probands with a deficiency of natural anticoagulants or multiple abnormalities. Counselling the asymptomatic female relatives of individuals with VTE and/or thrombophilia before pregnancy or the prescription of hormonal treatments should be administered with consideration of the risk driven by the type of thrombophilia and the family history of VTE.
Collapse
Affiliation(s)
- Valerio De Stefano
- Valerio De Stefano, MD, Institute of Hematology, Catholic University, Largo Gemelli 8, 00168 Rome, Italy, Tel.: +39 06 30154968, Fax: +39 06 30154206, E-mail:
| | | |
Collapse
|
36
|
Zöller B, Li X, Sundquist J, Sundquist K. Venous thromboembolism does not share strong familial susceptibility with pre-eclampsia/eclampsia: a nationwide family study in Sweden. BJOG 2013; 120:1200-6. [PMID: 23906308 DOI: 10.1111/1471-0528.12216] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2013] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Genetic variants associated with venous thromboembolism (VTE) have been suggested to be involved in the pathogenesis of pre-eclampsia/eclampsia (PEC/EC). This nationwide study aimed to determine whether VTE shares familial susceptibility with PEC/EC. DESIGN Population-based cohort study. SETTING Sweden. SAMPLE A total of 941 841 Swedish women delivering their first child between 1987 and 2008. METHODS Data from the Swedish Multigeneration Register were linked to the Swedish Hospital Discharge Register. The risk of PEC/EC was determined in primiparous women with a family history of VTE (in parents and/or siblings), compared with primiparous women without a family history of VTE. Odds ratios (ORs) were calculated by logistic regression. MAIN OUTCOME MEASURE PEC/EC in first pregnancy. RESULTS In total, 43 621 women had PEC/EC in association with their first pregnancy. The OR for PEC/EC in women with a family history of VTE was 1.06 (95% CI 1.01-1.11); however, a family history of VTE was associated with higher odds of PEC/EC among women with previous hypertension (OR 1.38, 95% CI 1.25-1.52). CONCLUSION A family history of VTE is weakly associated with PEC/EC risk, and is not clinically useful for the prediction of PEC/EC. The results of the present study suggest that it is unlikely that strong disease-causing mutations shared by VTE and PEC/EC are common in the Swedish population. The novel association between family history and PEC/EC among the subgroup with previous hypertension needs further confirmation in future studies.
Collapse
Affiliation(s)
- B Zöller
- Centre for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden.
| | | | | | | |
Collapse
|
37
|
Zöller B, Ohlsson H, Sundquist J, Sundquist K. Familial risk of venous thromboembolism in first-, second- and third-degree relatives: a nationwide family study in Sweden. Thromb Haemost 2013; 109:458-63. [PMID: 23348971 DOI: 10.1160/th12-10-0743] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Accepted: 11/21/2012] [Indexed: 11/05/2022]
Abstract
Venous thromboembolism (VTE) clusters in families, but the familial risk of VTE has only been determined in first-degree relatives. This nationwide study aimed to determine the familial risk of VTE in first-, second- and third-degree relatives of affected individuals. The Swedish Multi-Generation Register was linked to Hospital Discharge Register data for the period 1987-2009. This was a case-cohort study. Odds ratios (ORs) for VTE were calculated for individuals whose relatives were hospitalised for VTE, as determined by the International Classification of Diseases (ICD), and those whose relatives were unaffected by VTE. The familial OR for VTE was 2.49 in siblings (95% confidence interval [CI] 2.40-2.58), 2.65 in children (2.50-2.80), 2.09 in parents (2.03-2.15), 1.52 in maternal half-siblings (1.26-1.85), 2.34 in paternal half-siblings (2.00-2.73), 1.69 in nieces/nephews (1.57-1.82), 1.47 in cousins (1.33-1.64), and 1.14 in spouses of individuals diagnosed with VTE (1.09-1.18). Familial clustering was stronger at young ages. The familial transmission was slightly stronger for males compared with females but was only significant for siblings 1.13 (1.05-1.22) and parents 1.11 (1.05-1.78) of probands. The present data showing an increased VTE risk among not only first-degree relatives but also second- and third-degree relatives indicate that the genetic component of the familial clustering of VTE is strong. Family history is a potentially useful genetic surrogate marker for clinical VTE risk assessment, even in second- and third degree-relatives.
Collapse
Affiliation(s)
- Bengt Zöller
- Center for Primary Health Care Research, Lund University/Region Skåne, CRC, building 28, floor 11, Jan Waldenströms gata 35, Skåne University Hospital, S-205 02 Malmö, Sweden.
| | | | | | | |
Collapse
|
38
|
Kristinsson SY, Goldin L, Turesson I, Hultcrantz M, Björkholm M, Landgren O. Family history of venous thromboembolism is associated with increased risk for thrombosis in multiple myeloma: a population-based study. J Thromb Haemost 2012; 10:962-4. [PMID: 22372994 PMCID: PMC7241862 DOI: 10.1111/j.1538-7836.2012.04676.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
39
|
Zöller B, Li X, Sundquist J, Sundquist K. A nationwide family study of pulmonary embolism: identification of high risk families with increased risk of hospitalized and fatal pulmonary embolism. Thromb Res 2012; 130:178-82. [PMID: 22386135 DOI: 10.1016/j.thromres.2012.02.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2011] [Revised: 01/13/2012] [Accepted: 02/06/2012] [Indexed: 11/17/2022]
Abstract
BACKGROUND Family history is an important risk factor for deep venous thrombosis. However, few studies have determined the importance of family history of pulmonary embolism (PE). OBJECTIVE This nationwide study aimed to determine the familial risks of fatal and hospitalized PE. METHODS The Swedish Multi-Generation Register for subjects aged 0 to 76 years old born since 1932 were linked to the Hospital Discharge Register and Cause of Death Register for the period 1964-2008. Standardized incidence ratios (SIRs) for first hospitalization or death (without previous hospitalization for PE) with a main diagnosis of PE were calculated for individuals whose parent or siblings were hospitalized with or died from PE, compared to those whose parent or siblings were not affected by PE. RESULTS A total of 20,860 individuals were hospitalized for PE and 862 died due to primary fatal PE (without previous hospitalization for PE). The familial SIR for individuals with one sibling with hospitalized PE was 2.49 (95% CI 1.62-3.83). The familial SIR for siblings with two affected probands was 114.29 (95% CI 56.57-223.95). The familial SIRs for individuals with a parent or sibling hospitalized for PE were significantly increased for fatal PE (1.76; 95% CI 1.38-2.21) and hospitalized PE (2.13; 95% CI 2.04-2.23). Spouses had low overall familial risk for PE (1.09; 95% CI, 1.03-1.14). CONCLUSION The high familial risk in multiplex sibling families suggests the existence of strong genetic risk factors for PE. Familial factors and possibly genetic factors are important risk factors for primary fatal pulmonary embolism.
Collapse
Affiliation(s)
- Bengt Zöller
- Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden.
| | | | | | | |
Collapse
|
40
|
Lotta LA, Wang M, Yu J, Martinelli I, Yu F, Passamonti SM, Consonni D, Pappalardo E, Menegatti M, Scherer SE, Lewis LL, Akbar H, Wu Y, Bainbridge MN, Muzny DM, Mannucci PM, Gibbs RA, Peyvandi F. Identification of genetic risk variants for deep vein thrombosis by multiplexed next-generation sequencing of 186 hemostatic/pro-inflammatory genes. BMC Med Genomics 2012; 5:7. [PMID: 22353194 PMCID: PMC3305575 DOI: 10.1186/1755-8794-5-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Accepted: 02/21/2012] [Indexed: 01/31/2023] Open
Abstract
Background Next-generation DNA sequencing is opening new avenues for genetic association studies in common diseases that, like deep vein thrombosis (DVT), have a strong genetic predisposition still largely unexplained by currently identified risk variants. In order to develop sequencing and analytical pipelines for the application of next-generation sequencing to complex diseases, we conducted a pilot study sequencing the coding area of 186 hemostatic/proinflammatory genes in 10 Italian cases of idiopathic DVT and 12 healthy controls. Results A molecular-barcoding strategy was used to multiplex DNA target capture and sequencing, while retaining individual sequence information. Genomic libraries with barcode sequence-tags were pooled (in pools of 8 or 16 samples) and enriched for target DNA sequences. Sequencing was performed on ABI SOLiD-4 platforms. We produced > 12 gigabases of raw sequence data to sequence at high coverage (average: 42X) the 700-kilobase target area in 22 individuals. A total of 1876 high-quality genetic variants were identified (1778 single nucleotide substitutions and 98 insertions/deletions). Annotation on databases of genetic variation and human disease mutations revealed several novel, potentially deleterious mutations. We tested 576 common variants in a case-control association analysis, carrying the top-5 associations over to replication in up to 719 DVT cases and 719 controls. We also conducted an analysis of the burden of nonsynonymous variants in coagulation factor and anticoagulant genes. We found an excess of rare missense mutations in anticoagulant genes in DVT cases compared to controls and an association for a missense polymorphism of FGA (rs6050; p = 1.9 × 10-5, OR 1.45; 95% CI, 1.22-1.72; after replication in > 1400 individuals). Conclusions We implemented a barcode-based strategy to efficiently multiplex sequencing of hundreds of candidate genes in several individuals. In the relatively small dataset of our pilot study we were able to identify bona fide associations with DVT. Our study illustrates the potential of next-generation sequencing for the discovery of genetic variation predisposing to complex diseases.
Collapse
Affiliation(s)
- Luca A Lotta
- Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, U.O.S. Dipartimentale per la Diagnosi e la Terapia delle Coagulopatie, Fondazione IRCCS Cà Granda - Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Grosse SD. Incidence-based cost estimates require population-based incidence data. A critique of Mahan et al. Thromb Haemost 2011; 107:192-3; author reply 194-5. [PMID: 22159589 DOI: 10.1160/th11-09-0666] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Accepted: 10/06/2011] [Indexed: 12/11/2022]
|
42
|
Zöller B, Li X, Sundquist J, Sundquist K. Shared familial aggregation of susceptibility to different manifestations of venous thromboembolism: a nationwide family study in Sweden. Br J Haematol 2011; 157:146-8. [PMID: 22053747 DOI: 10.1111/j.1365-2141.2011.08927.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|