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Research
Open Access

COVID-19 in patients undergoing long-term dialysis in Ontario

Leena Taji, Doneal Thomas, Matthew J. Oliver, Jane Ip, Yiwen Tang, Angie Yeung, Rebecca Cooper, Andrew A. House, Phil McFarlane and Peter G. Blake
CMAJ February 22, 2021 193 (8) E278-E284; DOI: https://doi.org/10.1503/cmaj.202601
Leena Taji
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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Doneal Thomas
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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Matthew J. Oliver
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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Jane Ip
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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Yiwen Tang
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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Angie Yeung
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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Rebecca Cooper
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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Andrew A. House
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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Phil McFarlane
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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Peter G. Blake
Ontario Renal Network (Taji, Thomas, Oliver, Ip, Tang, Yeung, Cooper, McFarlane, Blake), Ontario Health; Department of Medicine (Oliver), University of Toronto, Toronto, Ont.; Schulich School of Medicine and Dentistry (House, Blake), Western University, London, Ont.; St. Michael’s Hospital (McFarlane), Toronto, Ont.
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    Figure 1:

    Flow chart for selection of the cohort of patients undergoing long-term dialysis in Ontario. Note: ORRS = Ontario Renal Reporting System, SARS-CoV-2 = severe acute respiratory syndrome coronavirus 2.

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    Figure 2:

    Number of new cases of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection among patients undergoing long-term dialysis in Ontario and the Ontario general population,2 per reporting week, as of Aug. 20, 2020. Note: We used 12 501 as the denominator for the dialysis population; peak incidence was 33 cases = 264 per 100 000 population for the week ending Apr. 23, 2020. We used 14 745 04014 as the denominator for the general Ontario population for this period; peak incidence was 3918 cases = 27 per 100 000 population for the week ending Apr. 23, 2020.

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    Figure 3:

    Summary of multivariable logistic regression predicting risk of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection among patients undergoing long-term dialysis (no. of patients with a diagnosis of SARS-CoV-2 infection = 187; no. without SARS-COV-2 infection = 12 246). Reference categories: age younger than 50 years, ethnicity White, geographic location outside the Greater Toronto Area (GTA), modality home dialysis, highest 2 income quintiles, 5 or fewer years undergoing dialysis, sex female and all other variables were No. Note: CI = confidence interval, OR = odds ratio. We excluded 68 patients from the cohort without SARS-CoV-2 infection because linkage to neighbourhood income quintiles was not possible.

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    Table 1:

    Clinical and demographic characteristics of patients undergoing long-term dialysis in Ontario with and without a diagnosis of SARS-CoV-2 infection, as of Aug. 20, 2020

    Table 1:
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Canadian Medical Association Journal: 193 (8)
CMAJ
Vol. 193, Issue 8
22 Feb 2021
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COVID-19 in patients undergoing long-term dialysis in Ontario
Leena Taji, Doneal Thomas, Matthew J. Oliver, Jane Ip, Yiwen Tang, Angie Yeung, Rebecca Cooper, Andrew A. House, Phil McFarlane, Peter G. Blake
CMAJ Feb 2021, 193 (8) E278-E284; DOI: 10.1503/cmaj.202601

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COVID-19 in patients undergoing long-term dialysis in Ontario
Leena Taji, Doneal Thomas, Matthew J. Oliver, Jane Ip, Yiwen Tang, Angie Yeung, Rebecca Cooper, Andrew A. House, Phil McFarlane, Peter G. Blake
CMAJ Feb 2021, 193 (8) E278-E284; DOI: 10.1503/cmaj.202601
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