Table 3.
Number of screening mammograms performed and/or new female breast cancer cases detected before and during the COVID-19 pandemic.
| First author (year) | Data source | Follow-up period (months) | Number of screening mammograms | Number of new breast cancer cases | ||||
|---|---|---|---|---|---|---|---|---|
| Pre-COVID | COVID | Change from baseline (%) | Pre-COVID | COVID | Change from baseline (%) | |||
| Bessa, 202122 | Registry | 12 | 1,810,901 | 1,037,280 | −42.7% | NA | NA | NA |
| Eijkelboom, 20219,28 | Registry | 7 | NA | NA | NA | 5749 | 3681 | −36.0% |
| Mantellini, 202010 | Registry | 5 | 878,046 | 405,657 | −53.8% | NA | NA | NA |
| Skovlund, 202140 | Registry | 4 | NA | NA | NA | 484 | 339 | −30.0% |
| Tsai, 202044 | Registry | 4 | 396,371 | 308,463 | −22.2% | NA | NA | NA |
| Vardhanabhuti, 202148 | Registry | 12 | NA | NA | NA | 4035 | 4057 | 0.5% |
| Vrdoljak, 202150 | Registry | 12 | NA | NA | NA | 2875 | 2848 | −0.9% |
| Amram, 202120 | Non-registry | 9 | 55,678 | 27,522 | −50.6% | NA | NA | NA |
| Barriga, 202121 | Non-registry | 4 | NA | NA | NA | 86 | 70 | −18.6% |
| Borsky, 202123 | Non-registry | 3 | NA | NA | NA | 136 | 102 | −25.0% |
| Chang, 202124 | Non-registry | 2 | NA | NA | NA | 790 | 279 | −64.7% |
| Chou, 202125 | Non-registry | 7 | NA | NA | NA | 128 | 115 | −10.2% |
| de Degani, 202126 | Non-registry | 7 | 9918 | 2098 | −78.8% | NA | NA | NA |
| DeGroff, 202127 | Non-registry | 3 | 55,856 | 19,754 | −64.6% | NA | NA | NA |
| Ferrara, 202129 | Non-registry | 2.5 | NA | NA | NA | 620 | 383 | −38.2% |
| Hamilton, 202130 | Non-registry | 7 | NA | NA | NA | 769 | 642 | −16.5% |
| Kaltofen, 202131 | Non-registry | 6 | NA | NA | NA | 170 | 150 | −11.8% |
| Kang, 202132 | Non-registry | 6 | 20,923 | 11,982 | −42.7% | 1669 | 1369 | −18.0% |
| Kempf, 202133 | Non-registry | 7 | NA | NA | NA | 1482 | 1259 | −15.0% |
| Knoll, 202134 | Non-registry | 10 | NA | NA | NA | 263 | 212 | −19.4% |
| Lloyd, 202135 | Non-registry | 4 | 8566 | 1713 | −80.0% | 399 | 333 | −16.6% |
| Miller, 202136 | Non-registry | 8 | 15,339 | 13,841 | −9.8% | NA | NA | NA |
| Morais, 202137 | Non-registry | 5 | NA | NA | NA | 370 | 227 | −38.6% |
| O’Brien, 202138 | Non-registry | 6 | NA | NA | NA | 201 | 195 | −3.0% |
| Sacoto, 202139 | Non-registry | 12 | 13,041 | 8239 | −36.8% | 285 | 210 | −26.3% |
| Sprague, 202141 | Non-registry | 7 | 190,454 | 126,040 | −33.8% | NA | NA | NA |
| Tonneson, 202142 | Non-registry | 5 | NA | NA | NA | 390 | 181 | −53.6% |
| Toss, 202143 | Non-registry | 3 | 15,942 | 9052 | −43.2% | 221 | 174 | −21.3% |
| Tsibulak, 202045,46 | Non-registry | 3 | NA | NA | NA | 351 | 201 | −42.7% |
| van Wyk, 202147 | Non-registry | 3 | NA | NA | NA | 247 | 139 | −43.7% |
| Velazquez, 202149 | Non-registry | 12 | 5662 | 3385 | −40.2% | NA | NA | NA |
NA - Not available.