Time period and industry | Workplace outbreaks | Cases | Hospitalisations | SIR in cases* | ||
N | N | %† | N | %† | SIR (95% CI) | |
Period 1 (1 Apr–31 Aug 2020) | ||||||
Accommodation and food service | 16 | 49 | 1% | 4 | 2% | 0.4 (0.3 to 0.5) |
Agriculture | 29 | 1339 | 20% | 21 | 11% | 24.9 (23.5 to 26.3) |
Construction | 11 | 43 | 1% | 0 | 0% | 0.1 (0.1 to 0.2) |
Education | 17 | 45 | 1% | 0 | 0% | 1.2 (0.9 to 1.6) |
Healthcare and social assistance | 549 | 4050 | 61% | 130 | 70% | 9.3 (9.0 to 9.6) |
Manufacturing—food | 32 | 474 | 7% | 17 | 9% | 5.0 (4.6 to 5.5) |
Manufacturing—other | 63 | 313 | 5% | 6 | 3% | 0.8 (0.7 to 0.9) |
Mining and utilities | 1 | 21 | 0% | 1 | 1% | 0.5 (0.3 to 0.7) |
Other service industries | 19 | 70 | 1% | 1 | 1% | 0.1 (0.1 to 0.2) |
Public administration | 5 | 32 | 0% | 3 | 2% | 0.2 (0.2 to 0.3) |
Retail trade | 16 | 42 | 1% | 0 | 0% | 0.1 (0.1 to 0.1) |
Transportation and warehousing | 29 | 164 | 2% | 4 | 2% | 0.8 (0.7 to 0.9) |
Wholesale trade | 3 | 6 | 0% | 0 | 0% | 0.1 (0 to 0.1) |
Period 2 (1 Sep–31 Dec 2020) | ||||||
Accommodation and food service | 114 | 528 | 4% | 6 | 5% | 0.6 (0.6 to 0.7) |
Agriculture | 26 | 532 | 4% | 4 | 3% | 2.4 (2.2 to 2.6) |
Construction | 58 | 192 | 1% | 2 | 2% | 0.1 (0.1 to 0.1) |
Education | 445 | 923 | 7% | 8 | 6% | 0.8 (0.8 to 0.9) |
Healthcare and social assistance | 1113 | 5862 | 45% | 60 | 46% | 2.6 (2.6 to 2.7) |
Manufacturing—food | 72 | 861 | 7% | 5 | 4% | 2.6 (2.4 to 2.8) |
Manufacturing—other | 214 | 1577 | 12% | 15 | 12% | 0.8 (0.7 to 0.8) |
Mining and utilities | 6 | 19 | 0% | 0 | 0% | 0.1 (0.1 to 0.1) |
Other service industries | 100 | 457 | 4% | 7 | 5% | 0.2 (0.2 to 0.2) |
Public administration | 31 | 130 | 1% | 1 | 1% | 0.3 (0.2 to 0.3) |
Retail trade | 96 | 528 | 4% | 7 | 5% | 0.3 (0.3 to 0.3) |
Transportation and warehousing | 64 | 1153 | 9% | 12 | 9% | 1.1 (1.0 to 1.1) |
Wholesale trade | 32 | 233 | 2% | 3 | 2% | 0.5 (0.4 to 0.5) |
Period 3 (1 Jan–31 Mar 2021) | ||||||
Accommodation and food service | 88 | 391 | 3% | 9 | 4% | 0.5 (0.5 to 0.6) |
Agriculture | 78 | 705 | 5% | 9 | 4% | 4.3 (4.0 to 4.6) |
Construction | 118 | 562 | 4% | 6 | 3% | 0.3 (0.3 to 0.4) |
Education | 484 | 1138 | 7% | 20 | 8% | 1.1 (1.1 to 1.2) |
Healthcare and social assistance | 1011 | 5471 | 35% | 51 | 21% | 2.2 (2.2 to 2.3) |
Manufacturing—food | 65 | 991 | 6% | 27 | 11% | 2.4 (2.2 to 2.5) |
Manufacturing—other | 267 | 2450 | 16% | 56 | 23% | 1.1 (1.0 to 1.1) |
Mining and utilities | 14 | 75 | 0% | 1 | 0% | 0.3 (0.2 to 0.4) |
Other service industries | 146 | 688 | 4% | 19 | 8% | 0.3 (0.3 to 0.3) |
Public administration | 53 | 376 | 2% | 5 | 2% | 0.7 (0.6 to 0.8) |
Retail trade | 128 | 718 | 5% | 11 | 5% | 0.3 (0.3 to 0.3) |
Transportation and warehousing | 106 | 1739 | 11% | 22 | 9% | 1.5 (1.4 to 1.5) |
Wholesale trade | 39 | 221 | 1% | 4 | 2% | 0.4 (0.3 to 0.4) |
*SIR was estimated by the ratio of workplace outbreak-associated COVID-19 incidence rate (per 200 000 work hours) to the overall incidence rate (per 200 000 hours awake) in Ontarians aged 15–69 years.
†The proportion (%) of cases and hospitalisations represent the share of outcomes from each two-digit North American Industry Classification System 2017 industry within the designated time period.