| Text box 1. Contributions to the literature |
|---|
| • Assessing the effect of the COVID-19 pandemic on breast cancer incidence, stage at diagnosis and treatment must consider population-level historical trends |
| • Incidence of early-stage breast cancer was lower in the first wave of the pandemic but recovered in the second half of 2020 in Belgium |
| • At the national level, no shift to more advanced stage at diagnosis was observed during the second half of 2020 in Belgium |
| • Treatment adaptations, such as increased use of neoadjuvant hormonal therapy to delay surgery, were appropriately applied |
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