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Lavikainen LI, Guyatt GH, Luomaranta AL, Cartwright R, Kalliala IEJ, Couban RJ, Aaltonen RL, Aro KM, Cárdenas JL, Devereaux PJ, Galambosi PJ, Ge FZ, Halme ALE, Haukka J, Izett-Kay ML, Joronen KM, Karjalainen PK, Khamani N, Oksjoki SM, Pourjamal N, Singh T, Tähtinen RM, Vernooij RWM, Tikkinen KAO. Risk of thrombosis and bleeding in gynecologic cancer surgery: systematic review and meta-analysis. Am J Obstet Gynecol 2024; 230:403-416. [PMID: 37827272 DOI: 10.1016/j.ajog.2023.10.006] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 09/30/2023] [Accepted: 10/02/2023] [Indexed: 10/14/2023]
Abstract
OBJECTIVE This study aimed to provide procedure-specific estimates of the risk of symptomatic venous thromboembolism and major bleeding in the absence of thromboprophylaxis, following gynecologic cancer surgery. DATA SOURCES We conducted comprehensive searches on Embase, MEDLINE, Web of Science, and Google Scholar for observational studies. We also reviewed reference lists of eligible studies and review articles. We performed separate searches for randomized trials addressing effects of thromboprophylaxis and conducted a web-based survey on thromboprophylaxis practice. STUDY ELIGIBILITY CRITERIA Observational studies enrolling ≥50 adult patients undergoing gynecologic cancer surgery procedures reporting absolute incidence for at least 1 of the following were included: symptomatic pulmonary embolism, symptomatic deep vein thrombosis, symptomatic venous thromboembolism, bleeding requiring reintervention (including reexploration and angioembolization), bleeding leading to transfusion, or postoperative hemoglobin <70 g/L. METHODS Two reviewers independently assessed eligibility, performed data extraction, and evaluated risk of bias of eligible articles. We adjusted the reported estimates for thromboprophylaxis and length of follow-up and used the median value from studies to determine cumulative incidence at 4 weeks postsurgery stratified by patient venous thromboembolism risk factors. The GRADE approach was applied to rate evidence certainty. RESULTS We included 188 studies (398,167 patients) reporting on 37 gynecologic cancer surgery procedures. The evidence certainty was generally low to very low. Median symptomatic venous thromboembolism risk (in the absence of prophylaxis) was <1% in 13 of 37 (35%) procedures, 1% to 2% in 11 of 37 (30%), and >2.0% in 13 of 37 (35%). The risks of venous thromboembolism varied from 0.1% in low venous thromboembolism risk patients undergoing cervical conization to 33.5% in high venous thromboembolism risk patients undergoing pelvic exenteration. Estimates of bleeding requiring reintervention varied from <0.1% to 1.3%. Median risks of bleeding requiring reintervention were <1% in 22 of 29 (76%) and 1% to 2% in 7 of 29 (24%) procedures. CONCLUSION Venous thromboembolism reduction with thromboprophylaxis likely outweighs the increase in bleeding requiring reintervention in many gynecologic cancer procedures (eg, open surgery for ovarian cancer and pelvic exenteration). In some procedures (eg, laparoscopic total hysterectomy without lymphadenectomy), thromboembolism and bleeding risks are similar, and decisions depend on individual risk prediction and values and preferences regarding venous thromboembolism and bleeding.
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Affiliation(s)
| | - Gordon H Guyatt
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Canada; Department of Medicine, McMaster University, Hamilton, Canada
| | - Anna L Luomaranta
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Rufus Cartwright
- Department of Gender Affirmation Surgery, Chelsea and Westminster NHS Foundation Trust, London, United Kingdom; Department of Epidemiology and Biostatistics, Imperial College London, London, United Kingdom
| | - Ilkka E J Kalliala
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Department of Metabolism, Digestion and Reproduction, Imperial College London, London, United Kingdom
| | - Rachel J Couban
- Department of Anesthesia, McMaster University, Hamilton, Canada
| | - Riikka L Aaltonen
- Department of Obstetrics and Gynaecology, Turku University Hospital and University of Turku, Turku, Finland
| | - Karoliina M Aro
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Jovita L Cárdenas
- Direction of Health Technology Assessment, National Center for Health Technology Excellence (CENETEC), Mexico City, Mexico
| | - P J Devereaux
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Canada; Department of Medicine, McMaster University, Hamilton, Canada; Population Health Research Institute, Hamilton, Canada; Outcomes Research Consortium, Cleveland, OH
| | - Päivi J Galambosi
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Fang Zhou Ge
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Canada
| | - Alex L E Halme
- Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Jari Haukka
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland; Clinicum/Department of Public Health, University of Helsinki, Helsinki, Finland
| | - Matthew L Izett-Kay
- Urogynaecology Department, John Radcliffe Hospital, Oxford University Hospitals, Oxford, United Kingdom
| | - Kirsi M Joronen
- Department of Obstetrics and Gynaecology, Turku University Hospital and University of Turku, Turku, Finland
| | - Päivi K Karjalainen
- Department of Obstetrics and Gynecology, Central Finland Central Hospital, Jyväskylä, Finland; Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Nadina Khamani
- Department of Obstetrics and Gynecology, Institute of Children's Health, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | | | - Negar Pourjamal
- Laboratory of Molecular Oncology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Tino Singh
- Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Riikka M Tähtinen
- Department of Obstetrics and Gynecology, Tampere University and Tampere University Hospital, Tampere, Finland
| | - Robin W M Vernooij
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands; Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Kari A O Tikkinen
- Faculty of Medicine, University of Helsinki, Helsinki, Finland; Department of Urology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Department of Surgery, South Karelia Central Hospital, Lappeenranta, Finland.
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Lavikainen LI, Guyatt GH, Kalliala IEJ, Cartwright R, Luomaranta AL, Vernooij RWM, Tähtinen RM, Tadayon Najafabadi B, Singh T, Pourjamal N, Oksjoki SM, Khamani N, Karjalainen PK, Joronen KM, Izett-Kay ML, Haukka J, Halme ALE, Ge FZ, Galambosi PJ, Devereaux PJ, Cárdenas JL, Couban RJ, Aro KM, Aaltonen RL, Tikkinen KAO. Risk of thrombosis and bleeding in gynecologic noncancer surgery: systematic review and meta-analysis. Am J Obstet Gynecol 2024; 230:390-402. [PMID: 38072372 DOI: 10.1016/j.ajog.2023.11.1255] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 01/13/2024]
Abstract
OBJECTIVE This study aimed to provide procedure-specific estimates of the risk for symptomatic venous thromboembolism and major bleeding in noncancer gynecologic surgeries. DATA SOURCES We conducted comprehensive searches on Embase, MEDLINE, Web of Science, and Google Scholar. Furthermore, we performed separate searches for randomized trials that addressed the effects of thromboprophylaxis. STUDY ELIGIBILITY CRITERIA Eligible studies were observational studies that enrolled ≥50 adult patients who underwent noncancer gynecologic surgery procedures and that reported the absolute incidence of at least 1 of the following: symptomatic pulmonary embolism, symptomatic deep vein thrombosis, symptomatic venous thromboembolism, bleeding that required reintervention (including re-exploration and angioembolization), bleeding that led to transfusion, or postoperative hemoglobin level <70 g/L. METHODS A teams of 2 reviewers independently assessed eligibility, performed data extraction, and evaluated the risk of bias of the eligible articles. We adjusted the reported estimates for thromboprophylaxis and length of follow-up and used the median value from studies to determine the cumulative incidence at 4 weeks postsurgery stratified by patient venous thromboembolism risk factors and used the Grading of Recommendations Assessment, Development and Evaluation approach to rate the evidence certainty. RESULTS We included 131 studies (1,741,519 patients) that reported venous thromboembolism risk estimates for 50 gynecologic noncancer procedures and bleeding requiring reintervention estimates for 35 procedures. The evidence certainty was generally moderate or low for venous thromboembolism and low or very low for bleeding requiring reintervention. The risk for symptomatic venous thromboembolism varied from a median of <0.1% for several procedures (eg, transvaginal oocyte retrieval) to 1.5% for others (eg, minimally invasive sacrocolpopexy with hysterectomy, 1.2%-4.6% across patient venous thromboembolism risk groups). Venous thromboembolism risk was <0.5% for 30 (60%) of the procedures; 0.5% to 1.0% for 10 (20%) procedures; and >1.0% for 10 (20%) procedures. The risk for bleeding the require reintervention varied from <0.1% (transvaginal oocyte retrieval) to 4.0% (open myomectomy). The bleeding requiring reintervention risk was <0.5% in 17 (49%) procedures, 0.5% to 1.0% for 12 (34%) procedures, and >1.0% in 6 (17%) procedures. CONCLUSION The risk for venous thromboembolism in gynecologic noncancer surgery varied between procedures and patients. Venous thromboembolism risks exceeded the bleeding risks only among selected patients and procedures. Although most of the evidence is of low certainty, the results nevertheless provide a compelling rationale for restricting pharmacologic thromboprophylaxis to a minority of patients who undergo gynecologic noncancer procedures.
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Affiliation(s)
| | - Gordon H Guyatt
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Ilkka E J Kalliala
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Department of Metabolism, Digestion and Reproduction, Imperial College London, London, United Kingdom
| | - Rufus Cartwright
- Chelsea Centre for Gender Surgery, Chelsea and Westminster NHS Foundation Trust, London, United Kingdom; Department of Gynaecology, Chelsea and Westminster NHS Foundation Trust, London, United Kingdom; Department of Epidemiology & Biostatistics, Imperial College London, London, United Kingdom
| | - Anna L Luomaranta
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Robin W M Vernooij
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands; Department of Nephrology & Hypertension, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Riikka M Tähtinen
- Department of Obstetrics and Gynecology, Tampere University and Tampere University Hospital, Tampere, Finland
| | - Borna Tadayon Najafabadi
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Tino Singh
- Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Negar Pourjamal
- Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | | | - Nadina Khamani
- Department of Obstetrics and Gynecology, Institute of Childrens' Health, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Päivi K Karjalainen
- Department of Obstetrics and Gynecology, Central Finland Central Hospital, Jyväskylä, Finland; Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Kirsi M Joronen
- Department of Obstetrics and Gynecology, Turku University Hospital and University of Turku, Finland
| | - Matthew L Izett-Kay
- Urogynaecology Department, The John Radcliffe Hospital, Oxford University Hospitals, Oxford, United Kingdom
| | - Jari Haukka
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland; Clinicum/Department of Public Health, University of Helsinki, Helsinki, Finland
| | - Alex L E Halme
- Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Fang Zhou Ge
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Päivi J Galambosi
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - P J Devereaux
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada; Population Health Research Institute, Hamilton, Ontario, Canada; Outcomes Research Consortium, Cleveland, OH
| | - Jovita L Cárdenas
- National Center for Health Technology Excellence (CENETEC), Direction of Health Technologies assessment, Mexico City, Mexico
| | - Rachel J Couban
- Department of Anesthesia, McMaster University, Hamilton, Ontario, Canada
| | - Karoliina M Aro
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Riikka L Aaltonen
- Urogynaecology Department, The John Radcliffe Hospital, Oxford University Hospitals, Oxford, United Kingdom
| | - Kari A O Tikkinen
- Faculty of Medicine, University of Helsinki, Helsinki, Finland; Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada; Department of Urology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Department of Surgery, South Karelian Central Hospital, Lappeenranta, Finland.
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Lavikainen LI, Guyatt GH, Lee Y, Couban RJ, Luomaranta AL, Sallinen VJ, Kalliala IEJ, Karanicolas PJ, Cartwright R, Aaltonen RL, Ahopelto K, Aro KM, Beilmann-Lehtonen I, Blanker MH, Cárdenas JL, Craigie S, Galambosi PJ, Garcia-Perdomo HA, Ge FZ, Gomaa HA, Huang L, Izett-Kay ML, Joronen KM, Karjalainen PK, Khamani N, Kilpeläinen TP, Kivelä AJ, Korhonen T, Lampela H, Mattila AK, Najafabadi BT, Nykänen TP, Nystén C, Oksjoki SM, Pandanaboyana S, Pourjamal N, Ratnayake CBB, Raudasoja AR, Singh T, Tähtinen RM, Vernooij RWM, Wang Y, Xiao Y, Yao L, Haukka J, Tikkinen KAO. Systematic reviews of observational studies of Risk of Thrombosis and Bleeding in General and Gynecologic Surgery (ROTBIGGS): introduction and methodology. Syst Rev 2021; 10:264. [PMID: 34625092 PMCID: PMC8499502 DOI: 10.1186/s13643-021-01814-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 09/12/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Venous thromboembolism (VTE) and bleeding are serious and potentially fatal complications of surgical procedures. Pharmacological thromboprophylaxis decreases the risk of VTE but increases the risk of major post-operative bleeding. The decision to use pharmacologic prophylaxis therefore represents a trade-off that critically depends on the incidence of VTE and bleeding in the absence of prophylaxis. These baseline risks vary widely between procedures, but their magnitude is uncertain. Systematic reviews addressing baseline risks are scarce, needed, and require innovations in methodology. Indeed, systematic summaries of these baseline risk estimates exist neither in general nor gynecologic surgery. We will fill this knowledge gap by performing a series of systematic reviews and meta-analyses of the procedure-specific and patient risk factor stratified risk estimates in general and gynecologic surgeries. METHODS We will perform comprehensive literature searches for observational studies in general and gynecologic surgery reporting symptomatic VTE or bleeding estimates. Pairs of methodologically trained reviewers will independently assess the studies for eligibility, evaluate the risk of bias by using an instrument developed for this review, and extract data. We will perform meta-analyses and modeling studies to adjust the reported risk estimates for the use of thromboprophylaxis and length of follow up. We will derive the estimates of risk from the median estimates of studies rated at the lowest risk of bias. The primary outcomes are the risk estimates of symptomatic VTE and major bleeding at 4 weeks post-operatively for each procedure stratified by patient risk factors. We will apply the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach to rate evidence certainty. DISCUSSION This series of systematic reviews, modeling studies, and meta-analyses will inform clinicians and patients regarding the trade-off between VTE prevention and bleeding in general and gynecologic surgeries. Our work advances the standards in systematic reviews of surgical complications, including assessment of risk of bias, criteria for arriving at the best estimates of risk (including modeling of the timing of events and dealing with suboptimal data reporting), dealing with subgroups at higher and lower risk of bias, and use of the GRADE approach. SYSTEMATIC REVIEW REGISTRATION PROSPERO CRD42021234119.
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Affiliation(s)
| | - Gordon H Guyatt
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Yung Lee
- Division of General Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada
| | - Rachel J Couban
- Department of Anesthesia, McMaster University, Hamilton, ON, Canada
| | - Anna L Luomaranta
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Ville J Sallinen
- Department of Transplantation and Liver Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Department of Gastroenterological Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Ilkka E J Kalliala
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Paul J Karanicolas
- Department of Surgery, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
- Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Rufus Cartwright
- Department of Obstetrics and Gynaecology, LNWH NHS Trust, London, UK
| | - Riikka L Aaltonen
- Department of Obstetrics and Gynecology, Turku University Hospital and University of Turku, Turku, Finland
| | - Kaisa Ahopelto
- Department of Transplantation and Liver Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Karoliina M Aro
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Ines Beilmann-Lehtonen
- Department of Transplantation and Liver Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Marco H Blanker
- Department of General Practice and Elderly Care Medicine, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Jovita L Cárdenas
- National Center for Health Technology Excellence (CENETEC) Direction of Health Technologies assessment, Mexico City, Mexico
| | - Samantha Craigie
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Päivi J Galambosi
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Herney A Garcia-Perdomo
- Division of Urology, Department of Surgery, School of Medicine, Universidad del Valle, Cali, Colombia
| | - Fang Zhou Ge
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON, L8S 4L8, Canada
| | - Huda A Gomaa
- High Institute of Public Health, Alexandria University, Alexandria, Egypt
- Tanta Chest Hospital, Ministry of Health and Population, Tanta, Egypt
| | - Linglong Huang
- Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Matthew L Izett-Kay
- Urogynaecology Department, The John Radcliffe Hospital, Oxford University Hospitals, Oxford, UK
| | - Kirsi M Joronen
- Department of Obstetrics and Gynecology, Turku University Hospital and University of Turku, Turku, Finland
| | - Päivi K Karjalainen
- Department of Obstetrics and Gynecology, Central Finland Central Hospital, Jyväskylä, Finland
- Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Nadina Khamani
- Department of Obstetrics and Gynecology, Institute of Childrens' Health, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
- Department of Urology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Tuomas P Kilpeläinen
- Department of Urology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Antti J Kivelä
- Department of Gastroenterological Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Tapio Korhonen
- Experts by Experience, Abdominal Center, Helsinki University Hospital, Helsinki, Finland
| | - Hanna Lampela
- Department of Gastroenterological Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Anne K Mattila
- Central Finland Central Hospital, Department of Surgery, Jyväskylä, Finland
| | - Borna Tadayon Najafabadi
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | | | - Carolina Nystén
- Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | | | - Sanjay Pandanaboyana
- Department of HPB and Transplant Surgery, Freeman Hospital, Newcastle Upon Tyne, UK
- Population Health Sciences Institute, Newcastle University, Newcastle Upon Tyne, UK
| | - Negar Pourjamal
- Laboratory of Molecular Oncology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Chathura B B Ratnayake
- Department of Surgery, The University of Auckland, Auckland, New Zealand
- Auckland City Hospital, Auckland, New Zealand
| | | | - Tino Singh
- Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
| | - Riikka M Tähtinen
- Department of Obstetrics and Gynecology, Tampere University Hospital, Tampere, Finland
| | - Robin W M Vernooij
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
- Department of Nephrology & Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Yuting Wang
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Yingqi Xiao
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
- West China School of Nursing/Department of Nursing, West China Hospital, Sichuan University, Chengdu, China
| | - Liang Yao
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Jari Haukka
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
- Clinicum/Department of Public Health, University of Helsinki, Helsinki, Finland
| | - Kari A O Tikkinen
- Department of Urology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
- Department of Surgery, South Karelian Central Hospital, Lappeenranta, Finland.
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Galambosi PJ, Gissler M, Kaaja RJ, Ulander VM. Incidence and risk factors of venous thromboembolism during postpartum period: a population-based cohort-study. Acta Obstet Gynecol Scand 2017; 96:852-861. [DOI: 10.1111/aogs.13137] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 03/22/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Päivi J. Galambosi
- Department of Obstetrics and Gynecology; Helsinki University Hospital; University of Helsinki; Helsinki Finland
| | - Mika Gissler
- Information Services Department; THL National Institute for Health and Welfare; Helsinki Finland
- Research Center for Child Psychiatry; University of Turku; Turku Finland
- Department of Neurobiology, Care Sciences and Society; Division of Family Medicine; Karolinska Institute; Stockholm Sweden
| | - Risto J. Kaaja
- University of Turku and Turku University Hospital; Turku Finland
| | - Veli-Matti Ulander
- Department of Obstetrics and Gynecology; Helsinki University Hospital; University of Helsinki; Helsinki Finland
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Galambosi PJ, Ulander VM, Kaaja R. The incidence and risk factors of recurrent venous thromboembolism during pregnancy. Thromb Res 2014; 134:240-5. [DOI: 10.1016/j.thromres.2014.04.026] [Citation(s) in RCA: 10] [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: 11/24/2013] [Revised: 04/10/2014] [Accepted: 04/18/2014] [Indexed: 10/25/2022]
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