Training
2013 PhD, Biostatistics, McGill University
2009 MSc, Statistics, McGill University
2008 BSc, Honours Applied Mathematics, McGill University
2013 Postdoctoral Researcher, Biostatistics, Harvard T.H. Chan School of Public Health
2012 Visiting Research Associate, Biostatistics, University of Pennsylvania
2011 Visiting Student Researcher, Biostatistics, UC Berkeley
2009 MSc, Statistics, McGill University
2008 BSc, Honours Applied Mathematics, McGill University
2013 Postdoctoral Researcher, Biostatistics, Harvard T.H. Chan School of Public Health
2012 Visiting Research Associate, Biostatistics, University of Pennsylvania
2011 Visiting Student Researcher, Biostatistics, UC Berkeley
Affiliations
2019- Professeure agrégée (Associate Professor), Faculté de pharmacie, Université de Montréal.
2019- Professeure agrégée en affiliation secondaire (Associate Professor, secondary affiliation), Département de médecine sociale et préventive, École de santé publique (School of Public Health), Université de Montréal
2015- Adjunct Professor, Department of Epidemiololgy, Biostatistics, and Occupational Health, McGill University
2014-2019 Professeure adjointe (Assistant Professor, tenure track), Faculté de pharmacie, Université de Montréal
2019- Professeure agrégée en affiliation secondaire (Associate Professor, secondary affiliation), Département de médecine sociale et préventive, École de santé publique (School of Public Health), Université de Montréal
2015- Adjunct Professor, Department of Epidemiololgy, Biostatistics, and Occupational Health, McGill University
2014-2019 Professeure adjointe (Assistant Professor, tenure track), Faculté de pharmacie, Université de Montréal
Publications:
Methods papers (* indicates a graduate student I supervised)
Schnitzer ME, Platt R, Durand M. A tutorial on dealing with time-varying eligibility for treatment: Comparing the risk of major bleeding with DOACs versus warfarin. Accepted in Statistics in Medicine, July 2020.
Ferreira Guerra S*, Blais L, Forget A, Schnitzer ME. Impact of discretization of the timeline for longitudinal causal inference methods. Accepted in Statistics in Medicine, July 2020.
Schnitzer ME, Sango J, Ferreira Guerra S*, van der Laan MJ (2020). Data-adaptive longitudinal variable selection in causal inference with collaborative targeted minimum loss-based estimation. Biometrics, 76(1): 145-157.
Schnitzer ME (2020). Increasing Real World Usage of Targeted Minimum Loss-based Estimators. Commentary, accepted in Statistical Sciences, January 2020. 3 pages.
Steele RJ, Schnitzer ME, Shrier I (2020). Importance of Homogeneous Effect Modification for Causal Interpretation of Meta-analyses. Commentary, American Journal of Epidemiology, 31(3): 353-355.
Wang G*, Schnitzer ME, Menzies D, Viiklepp P, Holtz T, Benedetti A. Estimating treatment importance in multidrug-resistant tuberculosis using Targeted Learning: an observational individual patient data network meta-analysis. Accepted in Biometrics, December 2019.
Bahamyirou A*, Blais L, Forget A, Schnitzer ME (2019) Understanding and Diagnosing the Potential for Bias when using Machine Learning Methods with Doubly Robust Causal Estimators. Statistical Methods in Medical Research, 28(6):1637-1650. Link
Shrier I, Redelmeier A, Schnitzer ME, Steele RJ. Challenges in interpreting results from “multiple regression” when there is interaction between covariates. Accepted in BMJ Evidence-Based Medicine, August 2019.
Luque Fernandez MA, Schomaker M, Redondo-Sanchez D, Sánchez MJ, Vaidya A, Schnitzer ME (2019). Educational Note: Paradoxical Collider Effect in the Analysis of Non-Communicable Disease Epidemiological Data: a reproducible illustration and web application. International Journal of Epidemiology, 48(2): 640-653. Link App
Siddique AA*, Schnitzer ME, Bahamyirou A, Wang G, Holtz TH, Migliori GB, Sotgiu G, Gandhi NR, Vargas MH, Menzies D, Benedetti A (2019). Causal inference with multiple concurrent medications: a comparison of methods and an application in multidrug-resistant tuberculosis. Statistical Methods in Medical Research, 28(12):3534-3549. Link
Schnitzer ME, Blais L (2018) Methods for the assessment of selection bias in drug safety during pregnancy studies using electronic medical data, Pharmacology Research & Perspectives, 6(5): e00426.
Luque Fernandez MA, Schomaker M, Rachet B, Schnitzer ME (2018) Targeted Maximum Likelihood Estimation for a Binary Treatment: A Tutorial. Statistics in Medicine, 37(16) : 2530-2546.
Shrier I, Platt RW, Steele RJ and Schnitzer ME (2018) Estimating causal effects of treatment in a randomized trials when some participants only partially adhere. Epidemiology, 29(1): 78-86. Link
Schnitzer ME, Cefalu M (2018) Collaborative targeted learning using regression shrinkage.
Statistics in Medicine 37(4): 530-543. Link
Pang M, Schuster T, Filion K, Schnitzer ME, Eberg M, Platt R (2016) Effect Estimation in Point-exposure Studies with Binary Outcomes and High-dimensional Covariate Data – a Comparison of Targeted Maximum Likelihood Estimation and Inverse Probability of Treatment Weighting. International Journal of Biostatistics, 12(2). Link
Schnitzer ME, Steele RJ, Bally M, and Shrier I (2016) A causal inference approach to network meta-analysis. Journal of Causal Inference, 4(2). Link
Naimi AI, Schnitzer ME, Moodie EEM, and Bodnar LM (2016) Mediation Analysis for Health Disparities Research. American Journal of Epidemiology 184(4): 315-324. Link
Schnitzer ME, Lok JJ and Gruber S (2016) Variable selection for confounder control, flexible modeling and Collaborative Targeted Minimum Loss-based Estimation in causal inference. International Journal of Biostatistics 12(1): 97-115. Files Link
Schnitzer ME, Lok JJ and Ron Bosch (2016) Double robust and efficient estimation of a prognostic model for events in the presence of dependent censoring. Biostatistics 17(1): 165-177. Files Link
(Short invited article) Shrier I, Schnitzer ME, and Steele RJ (2015) When Intention to Treat is not the question : Systematic reviews and meta-analyses on the causal e ect of treatment. Cochrane DB Syst Rev Suppl 1 : 27-28. Link
Schnitzer ME, van der Laan MJ, Moodie EEM, and Platt RW (2014) Effect of Breastfeeding on Gastrointestinal Infection in Infants: A Targeted Maximum Likelihood Approach for Clustered Longitudinal Data. Annals of Applied Statistics 8(2): 703-725. Link
Schnitzer ME, Moodie EEM, van der Laan MJ, Platt RW, and Klein MB (2014) Modeling the impact of hepatitis C viral clearance on end-stage liver disease in an HIV co-infected cohort with Targeted Maximum Likelihood Estimation. Biometrics 70(1): 144–152. Link
Schnitzer ME, Moodie EEM, and Platt RW (2013) Targeted maximum likelihood for marginal time-dependent treatment effects under density misspecification. Biostatistics 14(1): 1-14. Link
Applications
Longo C, Forget A, Schnitzer ME, Blais L. Timing of Maternal Asthma Diagnosis in Relation to Adverse Perinatal Outcomes. Accepted in Journal of Allergy and Clinical Immunology: In Practice, January 2020.
Auger N, Potter BJ, Healy-Profitós J, He S, Schnitzer ME, Paradis G. Mood disorders in pregnant women and future cardiovascular risk (2020). Journal of Affective Disorders, 266: 128-134.
Auger N, Potter BJ, He S, Healy-Profitós J, Schnitzer ME, Paradis G. Maternal cardiovascular disease three decades after preterm birth: Longitudinal cohort study of pregnancy vascular disorders (2020). Hypertension, 75(3): 788-795.
Perreault S, de Denus S, White-Guay B, Côté R, Schnitzer ME, Dubé Marie-Pierre, Dorais M, Tardif J-C, Oral Anticoagulant Prescription Trends, Profile Use and Determinants of Adherence in Patients with Atrial Fibrillation (2020). Pharmacotherapy, 40(1): 40-54. Link
Lombardi J, Nguy P, Robichaud Ducharme A, Thompson-Desormeaux F, Ruo N, Girard G, Schnitzer ME, Thirion DJG, Papenburg J, Longpré AA (2019). Assessment of Surgical Antibiotic Prophylaxis Compliance in Pediatrics: A Pre–Post Quasi-experimental Study. The Pediatric Infectious Disease Journal, 39(1): 48-53.
Khanji C*, Schnitzer ME, Bareil C, Perreault S, Lalonde L (2019). Concordance of care processes between medication records and patient self-administered questionnaires. BMC Family Practice, 20:92
Blair A, Gauvin L, Schnitzer ME, Datta GD (2019). The role of access to a regular primary care physician in mediating immigration-based disparities in colorectal screening: Application of multiple mediation methods. Cancer Epidemiology, Biomarkers & Prevention, 28(4):650-658. Link
Perreault S, Côté R, White-Guay B, Dorais M, Oussaïd E, Schnitzer ME (2019). Anticoagulants in older patients with non-valvular atrial fibrillation after intracranial hemorrhage. Journal of Stroke, 21(2): 195-206.
Khanji C*, Lalonde L, Bareil C, Lussier M-T, Perreault S, Schnitzer ME (2019). LASSO Regression for the Prediction of Intermediate Outcomes Related to Cardiovascular Disease Prevention Using the Transit Quality Indicators. Medical Care, 57(1): 63-72. Link
Discepola V, Schnitzer ME, Jolicoeur EM, Rousseau G, Lordkipanidzé M (2018). Clinical Importance of Thrombocytopenia in Patients with Acute Coronary Syndromes - a Systematic Review and Meta-Analysis (2019). Platelets, 30(7): 817-827. Link
Doré I, O'Loughlin JL, Schnitzer ME, Datta GD, Fournier L (2018) The longitudinal association between the context of physical activity and mental health in early adulthood. Mental Health and Physical Activity, 14: 121-130.
Auger N, Arbour L, Schnitzer ME, Healy-Profitós J, Nadeau G, Fraser WD (2018). Pregnancy Outcomes of Women with Spina Bifida. Disability and Rehabilitation, 12:1-7.
Awad C*, Canneva A*, Chiasson CO*, Galarneau A*, Schnitzer ME, Sheehan NL, Wong AYJ (2017). PHIRST Trial - Pharmacist Consults: Prioritization of HIV Patients with a Referral Screening Tool. AIDS Care: Psychology, Health & Medicine - Vulnerable Children and Youth Studies, 14: 1-10. Link
Antaky E, Choinière M, Schnitzer ME, Martin E, Berbiche D, Perreault S, Lussier D, Lalonde L (2017) Identifying heavy healthcare users among primary care patients with chronic non-cancer pain. Canadian Journal of Pain, 1(1): 22-36. Link
Auger N, Fraser, WD, Schnitzer ME, Leduc L, Healy-Profitós J, and Paradis G (2016) Recurrent preeclampsia and accelerated cardiovascular risk, Heart, 103(3): 235-243. Link
Schnitzer ME, Hudson M, Baron M, Steele RJ, and the Canadian Scleroderma Research Group (2011) Disability in systemic sclerosis -- a longitudinal observational study. Journal of Rheumatology 38: 685-692. Link
Walker JG, Steele RJ, Schnitzer ME, Taillefer S, Baron M, the Canadian Scleroderma Research Group, and Hudson M (2010) The association between disease activity and duration in systemic sclerosis. Journal of Rheumatology. 37: 2299-2306. Link
Schnitzer ME, Platt R, Durand M. A tutorial on dealing with time-varying eligibility for treatment: Comparing the risk of major bleeding with DOACs versus warfarin. Accepted in Statistics in Medicine, July 2020.
Ferreira Guerra S*, Blais L, Forget A, Schnitzer ME. Impact of discretization of the timeline for longitudinal causal inference methods. Accepted in Statistics in Medicine, July 2020.
Schnitzer ME, Sango J, Ferreira Guerra S*, van der Laan MJ (2020). Data-adaptive longitudinal variable selection in causal inference with collaborative targeted minimum loss-based estimation. Biometrics, 76(1): 145-157.
Schnitzer ME (2020). Increasing Real World Usage of Targeted Minimum Loss-based Estimators. Commentary, accepted in Statistical Sciences, January 2020. 3 pages.
Steele RJ, Schnitzer ME, Shrier I (2020). Importance of Homogeneous Effect Modification for Causal Interpretation of Meta-analyses. Commentary, American Journal of Epidemiology, 31(3): 353-355.
Wang G*, Schnitzer ME, Menzies D, Viiklepp P, Holtz T, Benedetti A. Estimating treatment importance in multidrug-resistant tuberculosis using Targeted Learning: an observational individual patient data network meta-analysis. Accepted in Biometrics, December 2019.
Bahamyirou A*, Blais L, Forget A, Schnitzer ME (2019) Understanding and Diagnosing the Potential for Bias when using Machine Learning Methods with Doubly Robust Causal Estimators. Statistical Methods in Medical Research, 28(6):1637-1650. Link
Shrier I, Redelmeier A, Schnitzer ME, Steele RJ. Challenges in interpreting results from “multiple regression” when there is interaction between covariates. Accepted in BMJ Evidence-Based Medicine, August 2019.
Luque Fernandez MA, Schomaker M, Redondo-Sanchez D, Sánchez MJ, Vaidya A, Schnitzer ME (2019). Educational Note: Paradoxical Collider Effect in the Analysis of Non-Communicable Disease Epidemiological Data: a reproducible illustration and web application. International Journal of Epidemiology, 48(2): 640-653. Link App
Siddique AA*, Schnitzer ME, Bahamyirou A, Wang G, Holtz TH, Migliori GB, Sotgiu G, Gandhi NR, Vargas MH, Menzies D, Benedetti A (2019). Causal inference with multiple concurrent medications: a comparison of methods and an application in multidrug-resistant tuberculosis. Statistical Methods in Medical Research, 28(12):3534-3549. Link
Schnitzer ME, Blais L (2018) Methods for the assessment of selection bias in drug safety during pregnancy studies using electronic medical data, Pharmacology Research & Perspectives, 6(5): e00426.
Luque Fernandez MA, Schomaker M, Rachet B, Schnitzer ME (2018) Targeted Maximum Likelihood Estimation for a Binary Treatment: A Tutorial. Statistics in Medicine, 37(16) : 2530-2546.
Shrier I, Platt RW, Steele RJ and Schnitzer ME (2018) Estimating causal effects of treatment in a randomized trials when some participants only partially adhere. Epidemiology, 29(1): 78-86. Link
Schnitzer ME, Cefalu M (2018) Collaborative targeted learning using regression shrinkage.
Statistics in Medicine 37(4): 530-543. Link
Pang M, Schuster T, Filion K, Schnitzer ME, Eberg M, Platt R (2016) Effect Estimation in Point-exposure Studies with Binary Outcomes and High-dimensional Covariate Data – a Comparison of Targeted Maximum Likelihood Estimation and Inverse Probability of Treatment Weighting. International Journal of Biostatistics, 12(2). Link
Schnitzer ME, Steele RJ, Bally M, and Shrier I (2016) A causal inference approach to network meta-analysis. Journal of Causal Inference, 4(2). Link
Naimi AI, Schnitzer ME, Moodie EEM, and Bodnar LM (2016) Mediation Analysis for Health Disparities Research. American Journal of Epidemiology 184(4): 315-324. Link
Schnitzer ME, Lok JJ and Gruber S (2016) Variable selection for confounder control, flexible modeling and Collaborative Targeted Minimum Loss-based Estimation in causal inference. International Journal of Biostatistics 12(1): 97-115. Files Link
Schnitzer ME, Lok JJ and Ron Bosch (2016) Double robust and efficient estimation of a prognostic model for events in the presence of dependent censoring. Biostatistics 17(1): 165-177. Files Link
(Short invited article) Shrier I, Schnitzer ME, and Steele RJ (2015) When Intention to Treat is not the question : Systematic reviews and meta-analyses on the causal e ect of treatment. Cochrane DB Syst Rev Suppl 1 : 27-28. Link
Schnitzer ME, van der Laan MJ, Moodie EEM, and Platt RW (2014) Effect of Breastfeeding on Gastrointestinal Infection in Infants: A Targeted Maximum Likelihood Approach for Clustered Longitudinal Data. Annals of Applied Statistics 8(2): 703-725. Link
Schnitzer ME, Moodie EEM, van der Laan MJ, Platt RW, and Klein MB (2014) Modeling the impact of hepatitis C viral clearance on end-stage liver disease in an HIV co-infected cohort with Targeted Maximum Likelihood Estimation. Biometrics 70(1): 144–152. Link
Schnitzer ME, Moodie EEM, and Platt RW (2013) Targeted maximum likelihood for marginal time-dependent treatment effects under density misspecification. Biostatistics 14(1): 1-14. Link
Applications
Longo C, Forget A, Schnitzer ME, Blais L. Timing of Maternal Asthma Diagnosis in Relation to Adverse Perinatal Outcomes. Accepted in Journal of Allergy and Clinical Immunology: In Practice, January 2020.
Auger N, Potter BJ, Healy-Profitós J, He S, Schnitzer ME, Paradis G. Mood disorders in pregnant women and future cardiovascular risk (2020). Journal of Affective Disorders, 266: 128-134.
Auger N, Potter BJ, He S, Healy-Profitós J, Schnitzer ME, Paradis G. Maternal cardiovascular disease three decades after preterm birth: Longitudinal cohort study of pregnancy vascular disorders (2020). Hypertension, 75(3): 788-795.
Perreault S, de Denus S, White-Guay B, Côté R, Schnitzer ME, Dubé Marie-Pierre, Dorais M, Tardif J-C, Oral Anticoagulant Prescription Trends, Profile Use and Determinants of Adherence in Patients with Atrial Fibrillation (2020). Pharmacotherapy, 40(1): 40-54. Link
Lombardi J, Nguy P, Robichaud Ducharme A, Thompson-Desormeaux F, Ruo N, Girard G, Schnitzer ME, Thirion DJG, Papenburg J, Longpré AA (2019). Assessment of Surgical Antibiotic Prophylaxis Compliance in Pediatrics: A Pre–Post Quasi-experimental Study. The Pediatric Infectious Disease Journal, 39(1): 48-53.
Khanji C*, Schnitzer ME, Bareil C, Perreault S, Lalonde L (2019). Concordance of care processes between medication records and patient self-administered questionnaires. BMC Family Practice, 20:92
Blair A, Gauvin L, Schnitzer ME, Datta GD (2019). The role of access to a regular primary care physician in mediating immigration-based disparities in colorectal screening: Application of multiple mediation methods. Cancer Epidemiology, Biomarkers & Prevention, 28(4):650-658. Link
Perreault S, Côté R, White-Guay B, Dorais M, Oussaïd E, Schnitzer ME (2019). Anticoagulants in older patients with non-valvular atrial fibrillation after intracranial hemorrhage. Journal of Stroke, 21(2): 195-206.
Khanji C*, Lalonde L, Bareil C, Lussier M-T, Perreault S, Schnitzer ME (2019). LASSO Regression for the Prediction of Intermediate Outcomes Related to Cardiovascular Disease Prevention Using the Transit Quality Indicators. Medical Care, 57(1): 63-72. Link
Discepola V, Schnitzer ME, Jolicoeur EM, Rousseau G, Lordkipanidzé M (2018). Clinical Importance of Thrombocytopenia in Patients with Acute Coronary Syndromes - a Systematic Review and Meta-Analysis (2019). Platelets, 30(7): 817-827. Link
Doré I, O'Loughlin JL, Schnitzer ME, Datta GD, Fournier L (2018) The longitudinal association between the context of physical activity and mental health in early adulthood. Mental Health and Physical Activity, 14: 121-130.
Auger N, Arbour L, Schnitzer ME, Healy-Profitós J, Nadeau G, Fraser WD (2018). Pregnancy Outcomes of Women with Spina Bifida. Disability and Rehabilitation, 12:1-7.
Awad C*, Canneva A*, Chiasson CO*, Galarneau A*, Schnitzer ME, Sheehan NL, Wong AYJ (2017). PHIRST Trial - Pharmacist Consults: Prioritization of HIV Patients with a Referral Screening Tool. AIDS Care: Psychology, Health & Medicine - Vulnerable Children and Youth Studies, 14: 1-10. Link
Antaky E, Choinière M, Schnitzer ME, Martin E, Berbiche D, Perreault S, Lussier D, Lalonde L (2017) Identifying heavy healthcare users among primary care patients with chronic non-cancer pain. Canadian Journal of Pain, 1(1): 22-36. Link
Auger N, Fraser, WD, Schnitzer ME, Leduc L, Healy-Profitós J, and Paradis G (2016) Recurrent preeclampsia and accelerated cardiovascular risk, Heart, 103(3): 235-243. Link
Schnitzer ME, Hudson M, Baron M, Steele RJ, and the Canadian Scleroderma Research Group (2011) Disability in systemic sclerosis -- a longitudinal observational study. Journal of Rheumatology 38: 685-692. Link
Walker JG, Steele RJ, Schnitzer ME, Taillefer S, Baron M, the Canadian Scleroderma Research Group, and Hudson M (2010) The association between disease activity and duration in systemic sclerosis. Journal of Rheumatology. 37: 2299-2306. Link