Table 3.
Number of interval cancers, interval cancer rates, and difference in interval cancer rates
| Study |
Digital |
Film |
Difference in interval cancers/1000 | |||||
|---|---|---|---|---|---|---|---|---|
| Author | Country | Screenings | Interval cancersa | Interval cancers/1000 | Screenings | Interval cancersa | Interval cancers/1000 | |
| Chiarelli et al., 2013 (43) and Prummel et al., 2016 (12) | Canada | 254 758 | 417 | 1.64 | 487 334 | 757 | 1.55 | 0.08 |
| Henderson et al., 2015 (37, 38) | United States | 1 218 314 | 895 | 0.73 | 1 803 201 | 1416 | 0.79 | −0.05 |
| Hofvind et al., 2014 (15) | Norway | 163 955 | 321 | 1.96 | 1 314 775 | 2349 | 1.79 | 0.17 |
| Sala et al., 2015 (13) | Spain | 79 031 | 112 | 1.42 | 82 961 | 114 | 1.37 | 0.04 |
| Sankatsing et al., 2018 (30) | Netherlands | 2 620 442 | 5748 | 2.19 | 4 722 885 | 10 412 | 2.2 | −0.01 |
| Skaane et al., 2007 (11) (Oslo II) | Norway | 6944 | 12 | 1.73 | 16 985 | 40 | 2.36 | −0.63 |
| Timmermans et al., 2017 (26) | Belgium | 133 627 | 369 | 2.76 | 143 293 | 391 | 2.73 | 0.03 |
a
Cancer rates include ductal carcinoma in situ and invasive.