S. M. Bates, I. A. Greer, S. Middeldorp, D. L. Veenstra, A. Prabulos et al., Vte, thrombophilia, antithrombotic therapy, and pregnancy: Antithrombotic therapy and prevention of thrombosis, Chest, vol.141, pp.691-736, 2012.

D. Benhamou, A. Mignon, G. Aya, J. Brichant, M. Bonnin et al., Maladie thromboembolique périopératoire et obstétricale. Pathologie gynécologique et obstétricale, Ann Fr Anesth Réanimation, vol.24, pp.911-931, 2005.

H. S. Ros, P. Lichtenstein, R. Bellocco, G. Petersson, and S. Cnattingius, Increased risks of circulatory diseases in late pregnancy and puerperium, Epidemiology, vol.12, pp.456-60, 2001.

J. A. Heit, C. E. Kobbervig, A. H. James, T. M. Petterson, K. R. Bailey et al., Trends in the Incidence of Venous Thromboembolism during Pregnancy or Postpartum: A 30-Year Population-Based Study, Ann Intern Med, vol.143, pp.697-706, 2005.

E. R. Pomp, A. M. Lenselink, F. R. Rosendaal, and C. Doggen, Pregnancy, the postpartum period and prothrombotic defects: risk of venous thrombosis in the MEGA study, J Thromb Haemost, vol.6, pp.632-639, 2008.

H. Kamel, B. B. Navi, N. Sriram, D. A. Hovsepian, R. B. Devereux et al., Risk of a Thrombotic Event after the 6-Week Postpartum Period, N Engl J Med, vol.370, pp.1307-1322, 2014.

E. Jackson, K. M. Curtis, and M. E. Gaffield, Risk of Venous Thromboembolism During the Postpartum Period: A Systematic Review, Obstet Gynecol, vol.117, pp.691-703, 2011.

N. K. Tepper, S. L. Boulet, M. K. Whiteman, M. Monsour, P. A. Marchbanks et al., Postpartum Venous Thromboembolism: Incidence and Risk Factors, Obstet Gynecol, vol.123, pp.987-96, 2014.

A. F. Jacobsen, F. E. Skjeldestad, and P. M. Sandset, Incidence and risk patterns of venous thromboembolism in pregnancy and puerperium-a register-based case-control study, Am J Obstet Gynecol, vol.198, pp.233-234, 2008.

, Assurance Maladie en ligne, 2016.

, WHO | International Classification of Diseases (ICD), 2014.

, Agence Technique de l'Information sur l'hospitalisation. Manuel des groupes homogènes de malades, 2015.

P. B. Ryan, P. E. Stang, J. M. Overhage, M. A. Suchard, A. G. Hartzema et al., A Comparison of the Empirical Performance of Methods for a Risk Identification System, Drug Saf, vol.36, pp.143-58, 2013.

L. Tamariz, T. Harkins, and V. Nair, A systematic review of validated methods for identifying venous thromboembolism using administrative and claims data, Pharmacoepidemiol Drug Saf, vol.21, pp.154-62, 2012.

P. Casez, J. Labarère, M. Sevestre, M. Haddouche, X. Courtois et al., ICD-10 hospital discharge diagnosis codes were sensitive for identifying pulmonary embolism but not deep vein thrombosis, J Clin Epidemiol, vol.63, pp.790-797, 2010.
URL : https://hal.archives-ouvertes.fr/hal-00453690

, Agence Technique de l'Information Hospitalière, 2017.

C. Quantin, J. Cottenet, A. Vuagnat, C. Prunet, M. Mouquet et al., Quality of perinatal statistics from hospital discharge data: Comparison with civil registration and the 2010 National Perinatal Survey, J Gynécologie Obstétrique Biol Reprod, vol.43, pp.680-90, 2014.

F. Lussana, M. Coppens, M. Cattaneo, and S. Middeldorp, Pregnancy-related venous thromboembolism: Risk and the effect of thromboprophylaxis, Thromb Res, vol.129, pp.673-80, 2012.

. R-core-team, R: A Language and Environment for Statistical Computing

, Austria: R Foundation for Statistical Computing, 2013.

T. M. Therneau and T. Lumley, Survival Analysis, 2014.

P. G. Lindqvist, J. Torsson, Å. Almqvist, and O. Björgell, Postpartum thromboembolism: Severe events might be preventable using a new risk score model. Vasc Health Risk Manag, vol.4, pp.1081-1088, 2008.

R. Gherman, Incidence, clinical characteristics, and timing of objectively diagnosed venous thromboembolism during pregnancy1, Obstet Gynecol, vol.94, pp.730-734, 1999.

P. B. Ryan, M. J. Schuemie, S. Gruber, I. Zorych, and D. Madigan, Empirical Performance of a New User Cohort Method: Lessons for Developing a Risk Identification and Analysis System, Drug Saf, vol.36, pp.59-72, 2013.

P. B. Ryan, M. J. Schuemie, and D. Madigan, Empirical Performance of a Self-Controlled Cohort Method: Lessons for Developing a Risk Identification and Analysis System, Drug Saf, vol.36, pp.95-106, 2013.

J. M. Morris, C. S. Algert, and C. L. Roberts, Incidence and risk factors for pulmonary embolism in the postpartum period, J Thromb Haemost, vol.8, pp.998-1003, 2010.

M. E. D'alton, A. M. Friedman, R. M. Smiley, D. M. Montgomery, M. J. Paidas et al., National Partnership for Maternal Safety: Consensus Bundle on Venous Thromboembolism, J Obstet Gynecol Neonatal Nurs, vol.45, pp.706-723, 2016.

, Thrombosis and Embolism during Pregnancy and the Puerperium, Reducing the Risk (Green-top Guideline No. 37a

R. Gynaecol, , p.16, 2017.

L. E. Lévesque, J. A. Hanley, A. Kezouh, and S. Suissa, Problem of immortal time bias in cohort studies: example using statins for preventing progression of diabetes, Bmj, vol.340, p.31, 2010.

I. Matok, L. Azoulay, H. Yin, and S. Suissa, Immortal time bias in observational studies of drug effects in pregnancy, Birt Defects Res A Clin Mol Teratol, vol.100, pp.658-62, 2014.

S. Suissa, Immortal time bias in pharmacoepidemiology, Am J Epidemiol, vol.167, pp.492-501, 2008.

K. Y. Bilimoria, J. Chung, and M. H. Ju, Evaluation of surveillance bias and the validity of the venous thromboembolism quality measure, JAMA, vol.310, pp.1482-1491, 2013.

A. Sultan, A. Tata, L. J. Grainge, M. J. West, and J. , The Incidence of First Venous Thromboembolism in and around Pregnancy Using Linked Primary and Secondary Care Data: A Population Based Cohort Study from England and Comparative Meta-Analysis, PLoS One, vol.8, p.70310, 2013.

J. Parvizi, C. L. Jacovides, O. Bican, J. J. Purtill, P. F. Sharkey et al., Is Deep Vein Thrombosis a Good Proxy for Pulmonary Embolus?, J Arthroplasty, vol.25, pp.138-182, 2010.