Article Figures & Tables
Figures
- Figure 1:
Physician cohort build. *Physicians whose permanent address was outside of Ontario were considered to be non-Ontario residents. The province where a person’s permanent address is located is encoded by the first 2 digits of the variable “prcddablk” in the Registered Persons Database, and the first 2 digits, “35,” represent Ontario. If data for this variable were missing or if the first 2 digits were not 35, the physician was considered to be a non-Ontario resident. Similarly, physicians with no registered health care services in the previous 5 years were considered to be non-Ontario residents.
- Figure 2:
Trends in SARS-CoV-2 testing and infection during the study period. Note: On May 2, 2020, Ontario shifted from a test-based approach (2 consecutive negative tests collected at least 24 hr apart) to a time-based approach (waiting 14 d from a positive test) for clearing cases. (23) Biweekly testing was mandated for workers in long-term care (LTC) homes on May 31, 2020, (24) which changed to weekly testing in hotspots on Nov. 22, 2020. (25)
- Figure 3:
Testing for SARS-CoV-2 infection among physicians who provided care in long-term care (LTC) settings versus other settings, by week. Note: On May 2, 2020, Ontario shifted from a test-based approach (2 consecutive negative tests collected at least 24 h apart) to a time-based approach (waiting 14 d from a positive test) for clearing cases. (23) Biweekly testing was mandated for workers in LTC homes on May 31, 2020, (24) which changed to weekly testing in hotspots on Nov. 22, 2020. (25)
Tables
Characteristic No. (%)* of physicians
n = 41 208Age, yr, mean ± SD 46.6 ± 14.1 < 40 15956 (38.7) 40–59 16422 (39.9) ≥ 60 8830 (21.4) Sex Male 23102 (56.1) Female 18106 (43.9) Residence† Urban 39265 (95.3) Rural 1758 (4.3) Missing 185 (0.4) Local Health Integration Network‡ Toronto Central 9934 (24.1) Central 5323 (12.9) Champlain 5185 (12.6) Hamilton Niagara Haldimand Brant 4292 (10.4) Mississauga Halton 3372 (8.2) South West 3343 (8.1) South East 1868 (4.5) Central East 1774 (4.3) Waterloo Wellington 1441 (3.5) North East 1251 (3.0) Erie St. Clair 1121 (2.7) North Simcoe Muskoka 974 (2.4) Central West 738 (1.8) North West 592 (1.4) Specialty Family medicine 18553 (45.0) Surgical 4393 (10.7) Internal medicine 3499 (8.5) Anesthesia 1295 (3.1) Emergency 478 (1.2) Cardiology 363 (0.9) Infectious diseases 67 (0.2) Postgraduate medical trainee 4125 (10.0) Other specialty 6462 (15.7) Missing 1973 (4.8) Provided care in a long-term care home No 38918 (94.4) Yes 2290 (5.6) Medical school location Canada 27479 (66.7) International 13729 (33.3) Years since medical school graduation, mean ± SD 20.6 ± 14.3 Hospital admissions§ ≥ 1 15750 (38.2) Charlson Comorbidity Index§ Mean score ± SD 0.1 ± 0.5 0 13942 (88.5) ≥ 1 1808 (11.5) Note: CPSO = College of Physicians and Surgeons of Ontario, SD = standard deviation.
↵* Unless otherwise specified.
↵† Rural defined as residing in a location with a population of < 10 000 individuals.
↵‡ Residence within Local Health Integration Network regions as defined by the Ontario Ministry of Health. Physician’s residential location may not coincide with their practice location. For a map, see https://www150.statcan.gc.ca/n1/pub/82-003-x/2015003/article/14144/c-g/fig1-eng.htm.
↵§ Calculated using all hospital admission records in the 5-year period before the study entry date. We defined the study entry date as Jan. 25, 2020, for physicians registered in CPSO by this date, and for those who registered after Jan. 25, 2020, the CPSO registration date was used as the study entry date.
- Table 2:
SARS-CoV-2 testing and infection in 41 208 physicians who practised in Ontario in 2020
Characteristic No. of physicians No. (row %) of physicians tested No. (row %) of physicians who tested positive Proportion of total physicians
n = 41 208Proportion of physicians tested
n = 19 116Proportion of physicians testing positive
n = 358Overall 41 208 19116 (46.4) 358 (0.9) Age, yr < 40 15 956 8707 (54.6) 167 (1.0) 38.7 45.5 46.6 40–59 16 422 7191 (43.8) 123 (0.7) 39.9 37.6 34.4 ≥ 60 8830 3218 (36.4) 68 (0.8) 21.4 16.8 19.0 Sex Male 23 102 9995 (43.3) 213 (0.9) 56.1 52.3 59.5 Female 18 106 9121 (50.4) 145 (0.8) 43.9 47.7 40.5 Residence* Urban 39 265 18 127 (46.2) ≥ 352 (≥ 0.9) 95.2 94.8 ≥ 98.3 Rural 1758 908 (51.6) < 6 (< 0.3) 4.3 4.7 < 1.7 Missing 185 81 (43.8) 0 (0) 0.4 0.4 0 Local Health Integration Network† Toronto Central 9934 5088 (51.2) 112 (1.1) 24.1 26.6 31.3 Central 5323 2248 (42.2) 50 (0.9) 12.9 11.8 14.0 Champlain 5185 2399 (46.3) 28 (0.5) 12.6 12.5 7.8 Hamilton Niagara Haldimand Brant 4292 1983 (46.2) 40 (0.9) 10.4 10.4 11.2 Mississauga Halton 3372 1551 (46.0) 42 (1.2) 8.2 8.1 11.7 South West 3343 1593 (47.7) 19 (0.6) 8.1 8.3 5.3 South East 1868 712 (38.1) < 6 (< 0.3) 4.5 3.7 < 1.7 Central East 1774 781 (44.0) 18 (1.0) 4.3 4.1 5.0 Waterloo Wellington 1441 635 (44.1) 18 (1.2) 3.5 3.3 5.0 North East 1251 626 (50.0) < 6 (< 0.5) 3.0 3.3 < 1.7 Erie St. Clair 1121 410 (36.6) 9 (0.8) 2.7 2.1 2.5 North Simcoe Muskoka 974 433 (44.5) 7 (0.7) 2.4 2.3 2.0 Central West 738 299 (40.5) 9 (1.2) 1.8 1.6 2.5 North West 592 358 (60.5) < 6 (< 1.0) 1.4 1.9 < 1.7 Specialty Family medicine 18 553 8857 (47.7) 171 (0.9) 45.0 46.3 47.8 Surgical 4393 1679 (38.1) 22 (0.5) 10.7 8.8 6.1 Internal medicine 3499 1625 (46.4) 44 (1.3) 8.5 8.5 12.3 Anesthesia 1295 596 (46.0) 6 (0.5) 3.1 3.1 1.7 Emergency 478 281 (58.8) < 6 (< 1.3) 1.2 1.5 < 1.7 Cardiology 363 161 (44.4) < 6 (< 1.7) 0.9 0.8 < 1.7 Postgraduate medical trainee 4125 2531 (61.4) 47 (1.1) 0.1 13.2 13.1 Infectious diseases 67 33 (49.3) < 6 (< 9.0) 0.2 0.2 < 1.7 Other specialty 6462 2516 (38.9) ≥ 36 (≥ 0.6) 15.7 13.2 ≥ 10.1 Missing 1973 837 (42.4) 14 (0.7) 4.8 4.4 3.9 Provided care in a long-term care home No 38 918 17 480 (44.9) 333 (0.9) 94.4 91.4 93.0 Yes 2290 1636 (71.4) 25 (1.1) 5.6 8.6 7.0 Medical school location Canada 27 479 13 440 (48.9) 230 (0.8) 66.7 70.3 64.2 International 13 729 5676 (41.3) 128 (0.9) 33.3 29.7 35.8 Hospital admissions‡ ≥ 1 15 750 7735 (49.1) 133 (0.8) 38.2 40.5 37.2 Charlson Comorbidity Index score‡ 0 13 942 6975 (50.0) 119 (0.9) 88.5 90.2 89.5 ≥ 1 1808 760 (42.0) 14 (0.8) 11.5 9.8 10.5 Note: CPSO = College of Physicians and Surgeons of Ontario, SD = standard deviation.
↵* Rural was defined as residing in a location with a population of < 10 000 individuals.
↵† Residence within Local Health Integration Network regions as defined by the Ontario Ministry of Health. Physician’s residential location may not coincide with their practice location. For a map, see https://www150.statcan.gc.ca/n1/pub/82-003-x/2015003/article/14144/c-g/fig1-eng.htm.
↵‡ Calculated using all hospital admission records in the 5-year period before study entry date. The study entry date was defined as Jan. 25, 2020, for physicians registered in CPSO on or before this date, and it was defined as the CPSO registration date for those who entered the cohort after this date.
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