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mina tadrous

Mina Tadrous, Dean Elterman, Wayne Khuu, Muhammad M Mamdani, David N Juurlink, Tara Gomes
INTRODUCTION: Medication is an important option for patients with overactive bladder (OAB), with four different drugs approved over the last 10 years including the first non-anticholinergic treatment, mirabegron. We set out to describe the number and rate of users of medication for the management of OAB over the last 15 years among residents of Ontario, Canada covered by the public drug programs. METHODS: We conducted a population-based, repeated cross-sectional study examining quarterly publically-funded prescription claims for OAB medications from January 2000 to June 2016 in Ontario, Canada...
December 22, 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
Lulu Gao, Mina Tadrous, Sandra Knowles, Muhammad Mamdani, J Michael Paterson, David Juurlink, Tara Gomes
PURPOSE: Provincial public drug formularies in Canada have different mechanisms for reimbursement of direct-acting oral anticoagulants (DOACs). We investigate how these differences influence DOAC utilization and expenditure across the country. METHODS: We conducted a population-based, cross-sectional study of all out-patient prescriptions for OACs dispensed to public beneficiaries between January 1, 2010, and June 30, 2015. We calculated quarterly rates of OAC use and expenditures stratified by OAC type and province...
November 2017: Healthcare Policy, Politiques de Santé
Mina Tadrous, Wayne Khuu, Gerald Lebovic, Matthew B Stanbrook, Diana Martins, J Michael Paterson, Muhammad M Mamdani, David N Juurlink, Tara Gomes
BACKGROUND: Omalizumab is indicated for the treatment of moderate to severe asthma. There is limited observational evidence on the costs and effectiveness of omalizumab. OBJECTIVE: To examine the costs and effectiveness of omalizumab for treatment of severe asthma relative to nonusers. METHODS: We conducted a within-person repeated-measures matched cohort study in Ontario, Canada from April 1, 2012 to March 31, 2014. Continuous users of omalizumab were matched with up to 4 nonusers according to age, sex, recent specialist visits, oral corticosteroid use, asthma severity, and Charlson comorbidity score...
October 3, 2017: Annals of Allergy, Asthma & Immunology
Yona Lunsky, Wayne Khuu, Mina Tadrous, Simone Vigod, Virginie Cobigo, Tara Gomes
OBJECTIVE: Antipsychotic use is controversial in the management of adults with intellectual and developmental disabilities (IDD) because of inconclusive evidence for efficacy in the absence of a comorbid psychiatric condition, and substantial concerns about adverse effects. We aimed to characterize antipsychotic use among Ontario adults with IDD and compare profiles of those with and without a documented psychiatric diagnosis. METHOD: This population-based study included 51,881 adults with IDD under 65 y as of April 2010 receiving provincial drug benefits in Ontario who were followed until March 2016 to identify those dispensed at least one antipsychotic medication...
January 1, 2017: Canadian Journal of Psychiatry. Revue Canadienne de Psychiatrie
Qi Guan, Wayne Khuu, Sheryl Spithoff, Tara Kiran, Meldon Kahan, Mina Tadrous, Diana Martins, Pamela Leece, Tara Gomes
BACKGROUND: Despite concerns surrounding high patient volumes in methadone clinics, little is known about the practice patterns of opioid maintenance therapy (OMT) providers in Ontario. We examined the distribution of these services and how physician characteristics differ based on prescribing volume. METHODS: We conducted a cross-sectional study among prescribers of methadone or buprenorphine to Ontario public drug beneficiaries in 2014 by stratifying physicians into low- (lower 50%), moderate- (51-89%) and high-volume (top 10%) prescribers...
August 1, 2017: Drug and Alcohol Dependence
Herman Kwok, Wayne Khuu, Kimberly Fernandes, Diana Martins, Mina Tadrous, Samantha Singh, David N Juurlink, Tara Gomes
Objective.:  Access to pregabalin via Ontario's public drug insurance program was expanded to an unrestricted model on April 1, 2013, from a prior authorization model. This study aims to identify the effect of expanded access on the rate of pregabalin use by publicly insured persons and to assess the characteristics of new patients initiating pregabalin following this expanded access. Methods.:  We conducted a cross-sectional time series analysis using the linked health administrative records of residents of Ontario, Canada, with public drug coverage who were dispensed a prescription for pregabalin between April 1, 2006, and December 31, 2014...
June 1, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
Tony Antoniou, Erin M Macdonald, Zhan Yao, Simon Hollands, Tara Gomes, Mina Tadrous, Muhammad M Mamdani, David N Juurlink
BACKGROUND: Dabigatran etexilate is a prodrug whose absorption is opposed by intestinal P-glycoprotein and which is converted by carboxylesterase to its active form, dabigatran. Unlike other statins, simvastatin and lovastatin are potent inhibitors of P-glycoprotein and carboxylesterase, and might either increase the risk of hemorrhage with dabigatran etexilate or decrease its effectiveness. METHODS: We conducted 2 population-based, nested case-control studies involving Ontario residents 66 years of age and older who started dabigatran etexilate between May 1, 2012, and Mar...
January 9, 2017: CMAJ: Canadian Medical Association Journal, Journal de L'Association Medicale Canadienne
Suzanne M Cadarette, Joann K Ban, Giulia P Consiglio, Cody D Black, David Dubins, Alexandra Marin, Mina Tadrous
OBJECTIVE: The objective of this study was to characterize the diffusion of methodological innovation. STUDY DESIGN AND SETTING: Comparative case study analysis of the diffusion of two methods that summarize confounder information into a single score: disease risk score (DRS) and high-dimensional propensity score (hdPS). We completed systematic searches to identify DRS and hdPS papers in the field of pharmacoepidemiology through to the end of 2013, plotted the number of papers and unique authors over time, and created sociograms and animations to visualize co-authorship networks...
April 2017: Journal of Clinical Epidemiology
Tara Gomes, Diana Martins, Mina Tadrous, J Michael Paterson, Baiju R Shah, Jack V Tu, David N Juurlink, Anna Chu, Muhammad M Mamdani
Importance: Given their high costs, payers have considered implementing quantity limits for reimbursement of blood glucose test strips. The effect of these limits on patient outcomes is unknown. Objective: To determine whether the introduction of quantity limits for blood glucose test strips in August 2013 was associated with changes in clinical outcomes. Design, Setting, and Participants: Cross-sectional time series analysis from April 2008 to March 2015 of residents of Ontario, Canada, aged 19 years and older with diabetes who were eligible for public drug coverage...
January 1, 2017: JAMA Internal Medicine
Mina Tadrous, Diana Martins, Zhan Yao, Muhammad M Mamdani, David N Juurlink, Tara Gomes, Tony Antoniou
BACKGROUND: Smoking remains a serious public health concern. Pharmacotherapy for smoking cessation, including bupropion and varenicline, are proven means to increase quit rates. Post-marketing reports describing suicidal behaviours have raised concerns about the safety of varenicline. However, whether varenicline imparts a higher risk of suicide relative to bupropion remains uncertain. METHODS: A population-based nested case-control study in Ontario, Canada, from April 1, 2011 to March 31, 2015 was conducted...
2016: PloS One
Diana Martins, Zhan Yao, Mina Tadrous, Baiju R Shah, David N Juurlink, Muhammad M Mamdani, Tara Gomes
PURPOSE: To examine the concordance between testosterone replacement therapy (TRT) use and established reimbursement criteria, as well as compare the persistence of use among available formulations (injectable, oral, topical gel, transdermal patch) among elderly men in Ontario, Canada. METHODS: We conducted a retrospective cohort study of men aged 66 years or older in Ontario newly treated with testosterone between 1 January 2009 and 31 December 2012 using linked health administrative data...
February 2017: Pharmacoepidemiology and Drug Safety
Gavin Mast, Kimberly Fernandes, Mina Tadrous, Diana Martins, Nathan Herrmann, Tara Gomes
BACKGROUND: Antipsychotics are commonly used to manage behavioral and psychological symptoms of dementia. Concerns over their safety and efficacy in this role have resulted in antipsychotics typically being recommended for short-term usage only when used among dementia patients. However, there is little work examining the duration of antipsychotic treatment in the elderly dementia patient population. OBJECTIVE: To determine the persistence of use of antipsychotics in elderly dementia patients and the role of dose on therapy duration...
June 2016: Drugs—Real World Outcomes
Nikita Arora, Sandra Knowles, Tara Gomes, Muhammad M Mamdani, David N Juurlink, Corine Carlisle, Mina Tadrous
OBJECTIVE: Although antidepressants and antipsychotics are valuable medications in the treatment of select psychiatric disorders, there is increasing focus on the balance of risks and benefits of these drugs as prescribed, particularly in the pediatric population. We examined recent national trends and interprovincial variation in dispensing of antipsychotic and antidepressant prescriptions to the Canadian pediatric population. METHOD: We conducted a population-based cross-sectional study of antidepressant and antipsychotic prescriptions dispensed by Canadian pharmacies to the pediatric population (≤18 years) between 2010 and 2013...
December 2016: Canadian Journal of Psychiatry. Revue Canadienne de Psychiatrie
Tara Gomes, Diana Martins, Mina Tadrous, J Michael Paterson, Baiju R Shah, David N Juurlink, Samantha Singh, Muhammad M Mamdani
OBJECTIVES: To evaluate the impact of new quantity limits for blood glucose test strips (BGTS) in August 2013 on utilization patterns and costs in the elderly population of Ontario, Canada. METHODS: We conducted a population-based, cross-sectional time series analysis of all individuals 65 years of age and older who received publically funded BGTSs between August 1, 2010, and July 31, 2015, in Ontario, Canada. The number of BGTSs dispensed and the associated costs were measured for 4 diabetes therapy subgroups-insulin, hypoglycemia-inducing oral agents, non-hypoglycemia-inducing oral agents, and no drug therapy-each month during the study period...
October 2016: Canadian Journal of Diabetes
Laura Desveaux, Tara Gomes, Mina Tadrous, Lianne Jeffs, Monica Taljaard, Jess Rogers, Chaim M Bell, Noah M Ivers
BACKGROUND: Antipsychotic medications are routinely prescribed in nursing homes to address the behavioral and psychological symptoms of dementia. Unfortunately, inappropriate prescribing of antipsychotic medications is common and associated with increased morbidity, adverse drug events, and hospitalizations. Multifaceted interventions can achieve a 12-20 % reduction in antipsychotic prescribing levels in nursing homes. Effective interventions have featured educational outreach and ongoing performance feedback...
March 29, 2016: Implementation Science: IS
Mina Tadrous, Diana Martins, Kathy Lee, Sandra Knowles, Muhammad M Mamdani, David N Juurlink, Tara Gomes
INTRODUCTION: Provincial drug-program policies for the reimbursement of testosterone replacement therapy (TRT) vary across Canada, which may result in marked regional variability in use. METHODS: We conducted a population-based cross-sectional analysis of provincially funded TRT spending and utilization in eight provinces across Canada in 2012. We reported the annual cost per user, total cost, and rate of use of TRT overall and by formulation. RESULTS: We identified 23,544 provincially-funded recipients of TRT in 2012 in the eight provinces studied...
December 2016: Expert Review of Pharmacoeconomics & Outcomes Research
Lindsay Wong, Andrea M Burden, Yan Yun Liu, Mina Tadrous, Nedzad Pojskic, Lisa Dolovich, Andrew Calzavara, Suzanne M Cadarette
BACKGROUND: Smoking is a significant public health concern. The Ontario Pharmacy Smoking Cessation Program was launched in September 2011 to leverage community pharmacists and expand access to smoking cessation services for public drug plan beneficiaries. METHODS: We examined health care utilization data in Ontario to describe public drug plan beneficiaries receiving, and pharmacies providing, smoking cessation services between September 2011 and September 2013...
January 2015: Canadian Pharmacists Journal: CPJ, Revue des Pharmaciens du Canada: RPC
Mina Tadrous, Muhammad M Mamdani, David N Juurlink, Murray D Krahn, Linda E Lévesque, Suzanne M Cadarette
AIM: To examine the performance of the disease risk score (DRS) in a cohort study with evidence of policy-induced selection bias. METHODS: We examined two cohorts of new users of bisphosphonates. Estimates for 1-year hip fracture rates between agents using DRS, exposure propensity scores and traditional multivariable analysis were compared. RESULTS: The results for the cohort with no evidence of policy-induced selection bias showed little variation across analyses (-4...
November 2015: Journal of Comparative Effectiveness Research
Lisa-Ann Fraser, Jordan M Albaum, Mina Tadrous, Andrea M Burden, Salimah Z Shariff, Suzanne M Cadarette
BACKGROUND: Bisphosphonates are the first-line therapy for the treatment of osteoporosis. In the province of Ontario, the Ontario Drug Benefit Program funds medications for patients aged 65 years and older. The Ontario Drug Benefit Program has a generic substitution policy that requires lower-cost generic drugs to be dispensed when they are available. However, there is controversy surrounding the efficacy and tolerability of generic bisphosphonates. The objective of this study was to describe patterns in the use of brand-name versus generic formulations when dispensing oral bisphosphonate over a 13-year period...
January 2015: CMAJ Open
John Greiss, Mina Tadrous
No abstract text is available yet for this article.
September 2014: Canadian Pharmacists Journal: CPJ, Revue des Pharmaciens du Canada: RPC
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