Nicholas Vozoris




Dr. Vozoris is an Assistant Professor and Clinician Investigator within the Division of Respirology, Department of Medicine, at the University of Toronto. He is also a Staff Respirologist at St. Michael’s Hospital with expertise in sleep medicine, hereditary hemorrhagic telangiectasia (HHT) and tuberculosis. He completed a Masters of Health Sciences degree in the Department of Community Health at the University of Toronto prior to his medical training. He also undertook research training at the Institute of Clinical Evaluative Sciences prior to coming on faculty at the University of Toronto. His main research interest is areas of overlap between sleep medicine and obstructive lung disease, such as the pharmacoepidemiology and health outcomes of sedative medication use in chronic respiratory disease populations. He also has research interests in the health effects of insomnia.  He uses observational study designs and techniques, and different types of pre-existing, population-based databases, such as Ontario provincial health administrative databases that are housed at the Institute of Clinical Evaluative Sciences and United States national health survey data that are available through the Centers for Disease Control and Prevention. He is a member of the Ontario COPD Population Health Network (COPD OPHN), which is a group of academic respirologists from various universities across Ontario who are working collaboratively on health services and health outcomes research relating to COPD.

Recent Publications

  1. To, T, Zhu, J, Terebessy, E, Borkhoff, CM, Gershon, AS, Kendzerska, T et al.. Mode of delivery and birth outcomes before and during COVID-19 -A population-based study in Ontario, Canada. PLoS One. 2024;19 (5):e0303175. doi: 10.1371/journal.pone.0303175. PubMed PMID:38728292 PubMed Central PMC11086824.
  2. Maqsood, A, Ma, X, Tullis, E, Ryan, CM, Anand, A, Stephenson, AL et al.. Sleep breathing disorder frequency, risk factors, and treatment among adults with cystic fibrosis. J Cyst Fibros. 2024;23 (1):144-149. doi: 10.1016/j.jcf.2023.12.005. PubMed PMID:38123381 .
  3. Tuff-Gordon, E, Faughnan, ME, Kim, H, Lawton, MT, Vozoris, NT, Brain Vascular Malformation Consortium HHT Investigator Group et al.. An analysis of sex differences in pulmonary arteriovenous malformation presentation, complications and management in a large, multinational registry of patients with hereditary haemorrhagic telangiectasia. ERJ Open Res. 2023;9 (3):. doi: 10.1183/23120541.00751-2022. PubMed PMID:37483279 PubMed Central PMC10359038.
  4. Ahmed, W, Batt, J, Seemangal, J, Sabur, NF, Vozoris, NT. Interferon-γ Release Assay Test Performance among Immunosuppressant Drug Recipients. Ann Am Thorac Soc. 2023;20 (3):479-482. doi: 10.1513/AnnalsATS.202207-592RL. PubMed PMID:36442149 .
  5. Thompson, KP, Sykes, J, Chandakkar, P, Marambaud, P, Vozoris, NT, Marchuk, DA et al.. Randomized, double-blind, placebo-controlled, crossover trial of oral doxycycline for epistaxis in hereditary hemorrhagic telangiectasia. Orphanet J Rare Dis. 2022;17 (1):405. doi: 10.1186/s13023-022-02539-8. PubMed PMID:36344987 PubMed Central PMC9640829.
  6. Vozoris, NT. Sleep health and race: little-chartered territory. Sleep. 2023;46 (1):. doi: 10.1093/sleep/zsac266. PubMed PMID:36335512 .
  7. Vozoris, NT, Zhu, J, Ryan, CM, Chow, CW, To, T. Cannabis use and risks of respiratory and all-cause morbidity and mortality: a population-based, data-linkage, cohort study. BMJ Open Respir Res. 2022;9 (1):. doi: 10.1136/bmjresp-2022-001216. PubMed PMID:35760496 PubMed Central PMC9240874.
  8. Ananiadis, T, Faughnan, ME, Clark, D, Prabhudesai, V, Kim, H, Lawton, MT et al.. Neurovascular Complications and Pulmonary Arteriovenous Malformation Feeding Artery Size. Ann Am Thorac Soc. 2022;19 (8):1432-1435. doi: 10.1513/AnnalsATS.202202-130RL. PubMed PMID:35442860 PubMed Central PMC9353961.
  9. Vozoris, NT. A critical review of the respiratory benefits and harms of orally administered opioids for dyspnea management in COPD. Expert Rev Respir Med. 2021;15 (12):1579-1587. doi: 10.1080/17476348.2021.2005584. PubMed PMID:34761704 .
  10. Wu, V, Lee, JM, Vozoris, NT, Faughnan, ME. Weekly epistaxis duration as an indicator of epistaxis severity in hereditary hemorrhagic telangiectasia-Preliminary results from a randomized controlled trial. Laryngoscope Investig Otolaryngol. 2021;6 (3):370-375. doi: 10.1002/lio2.561. PubMed PMID:34195356 PubMed Central PMC8223446.
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Affiliations & Other Activities

  • Staff Respirologist and Clinician Investigator, Division of Respirology, Department of Medicine, St. Michael’s Hospital
  • Assistant Professor, Division of Respirology, Department of Medicine, University of Toronto