COVID-19 Pandemic’s Effects on Breast Cancer Screening, Staging at Diagnosis at Presentation, Oncologic Management, and Immediate Reconstruction: A Canadian Perspective
Abstract
1. Introduction
2. Materials and Methods
3. Results
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Pre-COVID-19 Phase | COVID-19 Phase | p-Value | |
---|---|---|---|
N = 2577 | N = 2290 | ||
Age, in years | 0.99 | ||
18–24 | 3 (0.1%) | 2 (0.1%) | |
25–44 | 236 (9.2%) | 211 (9.2%) | |
45–64 | 1135 (44.0%) | 1020 (44.5%) | |
65–84 | 1095 (42.5%) | 959 (41.9%) | |
85+ | 108 (4.2%) | 98 (4.3%) | |
Cancer stage | <0.001 | ||
1 | 1602 (62.2%) | 1621 (70.8%) | |
2 | 578 (22.4%) | 349 (15.2%) | |
3 | 266 (10.3%) | 203 (8.9%) | |
4 | 131 (5.1%) | 117 (5.1%) | |
Had radiation treatment | 1145 (44.4%) | 1435 (62.7%) | <0.001 |
Had systemic treatment | 1151 (44.7%) | 1589 (69.4%) | <0.001 |
Had surgery | 1226 (47.6%) | 1013 (44.2%) | 0.020 |
Average time to treatment (days) | 94 | 48 | <0.001 |
Average time to surgery (days) | 89 | 69 | <0.001 |
Stage 1 | Stage 2 | Stage 3 | Stage 4 | |||||
---|---|---|---|---|---|---|---|---|
Type of Surgery | Pre- COVID-19 | COVID-19 | Pre- COVID-19 | COVID-19 | Pre- COVID-19 | COVID-19 | Pre- COVID-19 | COVID-19 |
N = 767 | N = 740 | N = 304 | N = 156 | N = 127 | N = 103 | N = 28 | N = 14 | |
Lumpectomy only | 491 (64.0%) | 482 (65.1%) | 148 (48.7%) | 71 (45.5%) | 30 (23.6%) | 28 (27.2%) | 16 (57.1%) | 8 (57.1%) |
Unilateral mastectomy only | 128 (16.7%) | 116 (15.7%) | 83 (27.3%) | 31 (19.9%) | 65 (51.2%) | 42 (40.8%) | 8 (28.6%) | 4 (28.6%) |
Lumpectomy with oncoplastic reconstruction and contralateral breast reduction | 32 (4.2%) | 27 (3.6%) | 22 (7.2%) | 11 (7.1%) | 4 (3.1%) | 5 (4.9%) | 1 (3.6%) | 0 (0.0%) |
Bilateral mastectomy only | 31 (4.0%) | 26 (3.5%) | 9 (3.0%) | 12 (7.7%) | 6 (4.7%) | 11 (10.7%) | 1 (3.6%) | 0 (0.0%) |
Unilateral mastectomy with immediate reconstruction using implant or tissue expander | 31 (4.0%) | 25 (3.4%) | 19 (6.3%) | 8 (5.1%) | 6 (4.7%) | 4 (3.9%) | 0 (0.0%) | 2 (14.3%) |
Bilateral mastectomy with bilateral immediate reconstruction using implants or tissue expanders | 21 (2.7%) | 21 (2.8%) | 2 (0.7%) | 7 (4.5%) | 2 (1.6%) | 6 (5.8%) | 2 (7.1%) | 0 (0.0%) |
Unilateral mastectomy with immediate reconstruction using flap | 12 (1.6%) | 12 (1.6%) | 7 (2.3%) | 4 (2.6%) | 7 (5.5%) | 5 (4.9%) | 0 (0.0%) | 0 (0.0%) |
Bilateral mastectomy with bilateral immediate reconstruction using bilateral flap reconstruction | 12 (1.6%) | 17 (2.3%) | 2 (0.7%) | 6 (3.8%) | 2 (1.6%) | 1 (1.0%) | 0 (0.0%) | 0 (0.0%) |
Stage 1 | Stage 2 | Stage 3 | Stage 4 | |||||
---|---|---|---|---|---|---|---|---|
Pre- COVID-19 | COVID-19 | Pre- COVID-19 | COVID-19 | Pre- COVID-19 | COVID-19 | Pre- COVID-19 | COVID-19 | |
N = 767 | N = 740 | N = 304 | N = 156 | N = 127 | N = 103 | N = 28 | N = 14 | |
Neoadjuvant chemotherapy | 33 (4.3%) | 61 (8.2%) | 55 (18.1%) | 48 (30.8%) | 49 (38.6%) | 55 (53.4%) | 11 (39.3%) | 5 (35.7%) |
Neoadjuvant endocrine therapy | 25 (3.3%) | 54 (7.3%) | 55 (18.1%) | 48 (30.8%) | 46 (36.2%) | 54 (52.4%) | 9 (32.1%) | 4 (28.6%) |
Radiation therapy | 360 (46.9%) | 515 (69.6%) | 130 (42.8%) | 105 (67.3%) | 81 (63.8%) | 89 (86.4%) | 15 (53.6%) | 13 (92.9%) |
Immediate breast reconstruction | 76 (9.9%) | 75 (10.1%) | 30 (9.9%) | 25 (16.0%) | 17 (13.4%) | 16 (15.6%) | 2 (7.1%) | 2 (14.3%) |
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Lopez Rios, A.A.; Dozois, A.; Johnson, A.T.; Canturk, T.; Zhang, J. COVID-19 Pandemic’s Effects on Breast Cancer Screening, Staging at Diagnosis at Presentation, Oncologic Management, and Immediate Reconstruction: A Canadian Perspective. Curr. Oncol. 2025, 32, 247. https://doi.org/10.3390/curroncol32050247
Lopez Rios AA, Dozois A, Johnson AT, Canturk T, Zhang J. COVID-19 Pandemic’s Effects on Breast Cancer Screening, Staging at Diagnosis at Presentation, Oncologic Management, and Immediate Reconstruction: A Canadian Perspective. Current Oncology. 2025; 32(5):247. https://doi.org/10.3390/curroncol32050247
Chicago/Turabian StyleLopez Rios, Adolfo Alejandro, Alissa Dozois, Alexander T. Johnson, Toros Canturk, and Jing Zhang. 2025. "COVID-19 Pandemic’s Effects on Breast Cancer Screening, Staging at Diagnosis at Presentation, Oncologic Management, and Immediate Reconstruction: A Canadian Perspective" Current Oncology 32, no. 5: 247. https://doi.org/10.3390/curroncol32050247
APA StyleLopez Rios, A. A., Dozois, A., Johnson, A. T., Canturk, T., & Zhang, J. (2025). COVID-19 Pandemic’s Effects on Breast Cancer Screening, Staging at Diagnosis at Presentation, Oncologic Management, and Immediate Reconstruction: A Canadian Perspective. Current Oncology, 32(5), 247. https://doi.org/10.3390/curroncol32050247