Table 1.
Missing | n(%) |
---|---|
ER |
16,247 (9.0%) |
PR |
21,306 (11.8%) |
HER2* |
45,021 (24.9%) |
Tumor grade |
10,594 (5.9%) |
Unknown cause of death |
2,386 (1.5%) |
Total cases with one or more of the above variables missing† |
57,695 (31.9%) |
Total cases with complete data | 123,395 (68.1%) |
*HER2 data not easily retrievable in the registry until 2006.
†Cases may be missing data for more than one variable.