Volumes of screening mammographic examinations in the OBSP before the COVID-19 pandemic (January 2019 to February 2020) and during service suspension (March 2020 to May 2020), by risk group
| Risk group | No. (%) of screening mammographic examinations | |||||
|---|---|---|---|---|---|---|
| Prepandemic period | Period of service suspension during the pandemic | |||||
| 2019 n = 706 363 | Jan. 2020 n = 61 332 | Feb. 2020 n = 55 167 | Mar. 2020 n = 31 650 | Apr. 2020 n = 149 | May 2020 n = 609 | |
| High Risk OBSP | ||||||
| Initial screens and rescreens (priority II) | 12 366 (1.8) | 1097 (1.8) | 1024 (1.9) | 609 (1.9) | 1 (0.7) | 72 (11.8) |
| OBSP (average risk) | ||||||
| Initial screens (priority IIIa) | 118 134 (16.7) | 10 703 (17.5) | 9798 (17.8) | 5394 (17.0) | 17 (11.4) | 108 (17.7) |
| Annual rescreens (priority IIIb) | 149 057 (21.1) | 12 288 (20.0) | 10 583 (19.2) | 6221 (19.7) | 43 (28.9) | 127 (20.9) |
| Biennial rescreens (priority IIIc) | 426 806 (60.4) | 37 244 (60.7) | 33 762 (61.2) | 19 426 (61.4) | 88 (59.1) | 302 (49.6) |
Note: OBSP = Ontario Breast Screening Program.