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Toronto (July 13, 2021) – A new population-based study looking at nearly 30 years of billing data demonstrates that sex-based differences in Ontario Health Insurance Plan (OHIP) payments exists for Canadian ophthalmologists.
A team led by researchers and clinicians from the Donald K. Johnson Eye Institute, part of the Krembil Research Institute at University Health Network (UHN), studied 22,389 Ontario physicians across three decades and found a significant payment gap between female and male ophthalmologists even after accounting for age, and some practice differences. This disparity was more pronounced among ophthalmologists when compared to other surgical, medical procedural and medical non-procedural specialty groups.
“This is real and robust health administrative data," says Dr. Tina Felfeli, a PhD student in the Vision Sciences Research Program at UHN and the THETA collaborative group at Toronto General Hospital, as well as first author on the paper. "In a fee-for-service environment, one wouldn't have expected differences between the sexes in OHIP payments." She adds, "these findings are very powerful."
The data was collected on OHIP fee-for-service payments between 1992 to 2018, through the Institute for Clinical Evaluative Sciences (ICES) database. ICES is a non-profit research institute, leading studies, which evaluate healthcare delivery and outcomes.
To date, the majority of the studies looking at disparity in pay amongst females and males have relied on self-reported income from surveys or Medicare/Medicaid payments, only capturing a subset of billing data.
"One of the most interesting findings in the study is that females appear to have the smallest representation in ophthalmology as compared to other specialty groups combined, and this is where we see the biggest disparity in payments," says Dr. Yvonne Buys, a clinician investigator with the Donald K. Johnson Eye Institute, and a senior author on the study.
Studying gender disparity in physician payments and advancement for females working in medical specialties is a major focus for Dr. Buys. This study builds on previous work she has done in this area.
"There is a perception that women are paid less because they may not work as many hours as men, or that they are somehow less productive," says Dr. Buys, “but this study shows that's not the case.
"So the next step in this research is to find out why the disparity exists."
Although future studies will shed further light on this, possible contributors may include referral patterns, complexity of cases, operating room access, choice of procedures, frequency of patient visits and billing practices. However, it is also possible that some of the differences are due to the individual's choice.
"In an era when a growing number of females are choosing to enter medical school, addressing the barriers to progression for females in surgical specialties will likely improve the appeal of ophthalmology as a profession for future generations," says Dr. Felfeli. She adds, "this will be an important step towards diversity and inclusion in medicine."
This study made use of de-identified data from the ICES Data Repository, which is managed by ICES with support from its funders and partners: Canada's Strategy for Patient-Oriented Research (SPOR), the Ontario SPOR Support Unit, CIHR, and the Government of Ontario. The opinions, results, and conclusions reported are those of the authors. No endorsement by ICES or any of its funders or partners is intended or should be inferred.
Dr. Felfeli is supported by educational grants from the Canada Graduate Scholarships, the University Health Network Vision Science Research Program, the UHN Foundation, University of Toronto Postgraduate Medical Education Research Awards and Fighting Blindness Canada.
The Krembil Research Institute (or "Krembil") is one of the principal research institutes of the University Health Network. Krembil is focused on research programs dedicated to brain & spine, arthritis and vision disorders, with a goal to alleviate debilitating chronic disease through basic, translational and clinical research. Krembil is located at the Toronto Western Hospital in downtown Toronto. For more information: www.uhn.ca/Research/Research_Institutes/Krembil.
University Health Network consists of Toronto General and Toronto Western Hospitals, Princess Margaret Cancer Centre, Toronto Rehabilitation Institute, and The Michener Institute of Education at UHN. The scope of research and complexity of cases at University Health Network has made it a national and international source for discovery, education and patient care. University Health Network has the largest hospital-based research program in Canada, with major research in cardiology, transplantation, neurosciences, oncology, surgical innovation, infectious diseases, genomic medicine and rehabilitation medicine. University Health Network is a research hospital affiliated with the University of Toronto. The Krembil Brain Institute at Toronto Western Hospital is the home to the largest team of neurosurgeons, neurologists, neuroradiologists and allied health professionals in Canada, with the widest range of expertise and specialty care for neurological diseases.
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