Search Results - "Calzavara, Andrew"

Effectiveness of BNT162b2 and mRNA-1273 covid-19 vaccines against symptomatic SARS-CoV-2 infection and severe covid-19 outcomes in Ontario, Canada: test negative design study by Chung, Hannah, He, Siyi, Nasreen, Sharifa, Sundaram, Maria E, Buchan, Sarah A, Wilson, Sarah E, Chen, Branson, Calzavara, Andrew, Fell, Deshayne B, Austin, Peter C, Wilson, Kumanan, Schwartz, Kevin L, Brown, Kevin A, Gubbay, Jonathan B, Basta, Nicole E, Mahmud, Salaheddin M, Righolt, Christiaan H, Svenson, Lawrence W, MacDonald, Shannon E, Janjua, Naveed Z, Tadrous, Mina, Kwong, Jeffrey C

“…To estimate the effectiveness of mRNA covid-19 vaccines against symptomatic infection and severe outcomes (hospital admission or death). Test negative design…”
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The increasing burden and complexity of multimorbidity by Pefoyo, Anna J Koné, Bronskill, Susan E, Gruneir, Andrea, Calzavara, Andrew, Thavorn, Kednapa, Petrosyan, Yelena, Maxwell, Colleen J, Bai, YuQing, Wodchis, Walter P

“…Multimorbidity, the co-occurrence of two or more chronic conditions, is common among older adults and is known to be associated with high costs and gaps in…”
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Surgeon- and hospital-level variation in wait times for scheduled non-urgent surgery in Ontario, Canada: A cross-sectional population-based study by de Jager, Pieter, Aleman, Dionne, Baxter, Nancy, Bell, Chaim, Bodur, Merve, Calzavara, Andrew, Campbell, Robert, Carter, Michael, Emerson, Scott, Gagliardi, Anna, Irish, Jonathan, Martin, Danielle, Lee, Samantha, SaxeBraithwaite, Marcy, Seyedi, Pardis, Takata, Julie, Yang, Suting, Zanchetta, Claudia, Urbach, David R

“…Canadian health systems fare poorly in providing timely access to elective surgical care, which is crucial for quality, trust, and satisfaction. We conducted a…”
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High-cost health care users in Ontario, Canada: demographic, socio-economic, and health status characteristics by Rosella, Laura C, Fitzpatrick, Tiffany, Wodchis, Walter P, Calzavara, Andrew, Manson, Heather, Goel, Vivek

“…Health care spending is overwhelmingly concentrated within a very small proportion of the population, referred to as the high-cost users (HCU). To date,…”
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Association of Low-Value Testing With Subsequent Health Care Use and Clinical Outcomes Among Low-risk Primary Care Outpatients Undergoing an Annual Health Examination by Bouck, Zachary, Calzavara, Andrew J, Ivers, Noah M, Kerr, Eve A, Chu, Cherry, Ferguson, Jacob, Martin, Danielle, Tepper, Joshua, Austin, Peter C, Cram, Peter, Levinson, Wendy, Bhatia, R Sacha

“…The association of low-value testing with downstream care and clinical outcomes among primary care outpatients is unknown to date. To assess the association of…”
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Epidemiology of Myocarditis and Pericarditis Following mRNA Vaccination by Vaccine Product, Schedule, and Interdose Interval Among Adolescents and Adults in Ontario, Canada by Buchan, Sarah A, Seo, Chi Yon, Johnson, Caitlin, Alley, Sarah, Kwong, Jeffrey C, Nasreen, Sharifa, Calzavara, Andrew, Lu, Diane, Harris, Tara M, Yu, Kelly, Wilson, Sarah E

“…Increased rates of myocarditis or pericarditis following receipt of COVID-19 mRNA vaccines have been observed. However, few available data are associated with…”
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Effectiveness of inactivated influenza vaccines in preventing influenza-associated deaths and hospitalizations among Ontario residents aged ≥ 65 years: estimates with generalized linear models accounting for healthy vaccinee effects by Ridenhour, Benjamin J, Campitelli, Michael A, Kwong, Jeffrey C, Rosella, Laura C, Armstrong, Ben G, Mangtani, Punam, Calzavara, Andrew J, Shay, David K

“…Estimates of the effectiveness of influenza vaccines in older adults may be biased because of difficulties identifying and adjusting for confounders of the…”
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Comparison of socio-economic determinants of COVID-19 testing and positivity in Canada: A multi-provincial analysis by Antonova, Lilia, Somayaji, Chandy, Cameron, Jillian, Sirski, Monica, Sundaram, Maria E, McDonald, James Ted, Mishra, Sharmistha, Kwong, Jeffrey C, Katz, Alan, Baral, Stefan, Caulley, Lisa, Calzavara, Andrew, Corsten, Martin, Johnson-Obaseki, Stephanie

“…Background The effects of the COVID-19 pandemic have been more pronounced for socially disadvantaged populations. We sought to determine how access to…”
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Sex Differences in Implantable Cardioverter-Defibrillator Outcomes: Findings From a Prospective Defibrillator Database by MACFADDEN, Derek R, CRYSTAL, Eugene, NANTHAKUMAR, Kumaraswamy, CALZAVARA, Andrew J, AUSTIN, Peter C, TU, Jack V, LEE, Douglas S, KRAHN, Andrew D, MANGAT, Iqwal, HEALEY, Jeffrey S, DORIAN, Paul, BIRNIE, David, SIMPSON, Christopher S, KHAYKIN, Yaariv, PINTER, Arnold

“…Sex differences in the use and outcomes of implantable cardioverter-defibrillators (ICDs) have not been fully studied. To examine potential sex differences in…”
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Rehospitalization After Traumatic Brain Injury: A Population-Based Study by Saverino, Cristina, MA, Swaine, Bonnie, PhD, Jaglal, Susan, PhD, Lewko, John, PhD, Vernich, Lee, MSc, Voth, Jennifer, PhD, Calzavara, Andrew, MSc, Colantonio, Angela, PhD, OT

“…Abstract Objective To examine, from a Canadian population-based perspective, the incidence and etiology of long-term hospital utilization among persons living…”
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Stringency of containment and closures on the growth of SARS-CoV-2 in Canada prior to accelerated vaccine roll-out by Vickers, David M., Baral, Stefan, Mishra, Sharmistha, Kwong, Jeffrey C., Sundaram, Maria, Katz, Alan, Calzavara, Andrew, Maheu-Giroux, Mathieu, Buckeridge, David L., Williamson, Tyler

“…•The empiric study of non-pharmaceutical interventions (NPIs) against COVID-19 is important for pandemic preparedness.•We explored the correlation between NPI…”
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Validation of Algorithms to Identify Invasive Electrophysiology Procedures Using Administrative Data in Ontario, Canada by Singh, Sheldon M., Webster, Lauren, Calzavara, Andrew, Wijeysundera, Harindra C.

“…BACKGROUND:Administrative database research can provide insight into the real-world effectiveness of invasive electrophysiology procedures. However, no…”
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Prescription medications dispensed following a nontraumatic spinal cord dysfunction: a retrospective population-based study in Ontario, Canada by Guilcher, Sara J. T., Hogan, Mary-Ellen, McCormack, Daniel, Calzavara, Andrew J., Hitzig, Sander L., Patel, Tejal, Packer, Tanya, Guan, Qi, Lofters, Aisha K.

“…Study design Retrospective cohort study. Objectives To examine the prevalence of polypharmacy for individuals with nontraumatic spinal cord dysfunction (NTSCD)…”
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Can high-cost spending in the community signal admission to hospital? A dynamic modeling study for urgent and elective cardiovascular patients by Cohen, Deborah, Wodchis, Walter P, Calzavara, Andrew

“…Much of the research on high-cost patients in healthcare has taken a static approach to studying what is actually a dynamic process. High-cost patients often…”
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Background incidence rates of hospitalisations and emergency department visits for thromboembolic and coagulation disorders in Ontario, Canada for COVID-19 vaccine safety assessment: a population-based retrospective observational study by Nasreen, Sharifa, Calzavara, Andrew J, Sundaram, Maria E, MacDonald, Shannon E, Righolt, Christiaan H, Pai, Menaka, Field, Thalia S, Zhou, Lily W, Wilson, Sarah E, Kwong, Jeffrey C

“…ObjectiveThe objective of this study was to estimate background rates of selected thromboembolic and coagulation disorders in Ontario,…”
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Validating International Classification of Disease 10th Revision algorithms for identifying influenza and respiratory syncytial virus hospitalizations by Hamilton, Mackenzie A, Calzavara, Andrew, Emerson, Scott D, Djebli, Mohamed, Sundaram, Maria E, Chan, Adrienne K, Kustra, Rafal, Baral, Stefan D, Mishra, Sharmistha, Kwong, Jeffrey C

“…Routinely collected health administrative data can be used to efficiently assess disease burden in large populations, but it is important to evaluate the…”
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A multifaceted primary care practice-based intervention to reduce ED visits and hospitalization for complex medical patients: A mixed methods study by O'Brien, Tara, Ivers, Noah, Bhattacharyya, Onil, Calzavara, Andrew, Pus, Laura, Mukerji, Geetha, Friedman, Steven M, Abrams, Howard, Stanaitis, Ian, Hawker, Gillian A, Pariser, Pauline

“…The management of complex, multi-morbid patients is challenging for solo primary care providers (PCPs) with limited access to resources. The primary objective…”
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Low rates of influenza immunization in young children under Ontario's universal influenza immunization program by Campitelli, Michael A, Inoue, Miho, Calzavara, Andrew J, Kwong, Jeffrey C, Guttmann, Astrid

“…To determine physician-administered influenza vaccine coverage for children aged 6 to 23 months in a jurisdiction with a universal influenza immunization…”
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A population-based study of homicide deaths in Ontario, Canada using linked death records by Lachaud, James, Donnelly, Peter D, Henry, David, Kornas, Kathy, Calzavara, Andrew, Bornbaum, Catherine, Rosella, Laura

“…Homicide - a lethal expression of violence - has garnered little attention from public health researchers and health policy makers, despite the fact that…”
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A multiprovincial retrospective analysis of the incidence of myocarditis or pericarditis after mRNA vaccination compared to the incidence after SARS-CoV-2 infection by Naveed, Zaeema, Chu, Cherry, Tadrous, Mina, Veroniki, Areti-Angeliki, Li, Julia, Rouleau, Isabelle, Febriani, Yossi, Calzavara, Andrew, Buchan, Sarah A., Nasreen, Sharifa, Schwartz, Kevin L., Wilton, James, Seo, Chi Yon, Thampi, Nisha, Wilson, Sarah E., Naus, Monika, De Serres, Gaston, Janjua, Naveed Z., Kwong, Jeffrey C.

“…To compare myocarditis/pericarditis risk after COVID-19 mRNA vaccination versus SARS-CoV-2 infection, and to assess if myocarditis/pericarditis risk varies by…”
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