Table 2.
POC 2005 – Distribution of Patients With Known vs. Unknown HER-2 Status by Non-clinical and Clinical Factors
| HER-2 Status Known | HER-2 Status Unknown or Not Tested | |||
|---|---|---|---|---|
| % | Count | % | Count | |
| Overall | 85.0 | 872 | 15.0 | 154 |
| Age | ||||
| <50 | 86.5 | 385 | 13.5 | 60 |
| ≥50 | 83.8 | 487 | 16.2 | 94 |
| Race/Ethnicity | ||||
| White nonHispanic | 83.5 | 223 | 16.5 | 44 |
| Black nonHispanic | 86.2 | 218 | 13.8 | 35 |
| Hispanic | 83.4 | 206 | 16.6 | 41 |
| Asian/PI | 87.7 | 178 | 12.3 | 25 |
| AI/AN | 83.9 | 47 | 16.1 | 9 |
| Nodesa | ||||
| Positive | 88.0 | 409 | 12.0 | 56 |
| Negative | 82.9 | 437 | 17.1 | 90 |
| Unknown/None examined | 76.5 | 26 | 23.5 | 8 |
| ER expressiona | ||||
| Positive | 85.7 | 608 | 14.3 | 101 |
| Negative | 88.5 | 230 | 11.5 | 30 |
| Unknown | 59.6 | 34 | 40.4 | 23 |
| PR expressiona | ||||
| Positive | 85.0 | 516 | 15.0 | 91 |
| Negative | 89.4 | 319 | 10.6 | 38 |
| Unknown/None examined | 59.7 | 37 | 40.3 | 25 |
| Tumor size | ||||
| < 2 cm | 83.3 | 424 | 16.7 | 85 |
| 2–4 cm | 86.3 | 340 | 13.7 | 54 |
| > 4 cm | 87.7 | 107 | 12.3 | 15 |
| Unknown | 100.0 | 1 | ||
| Grade | ||||
| Well/Moderate (I, II) | 84.7 | 461 | 15.3 | 83 |
| Poorly/Undifferentiated (III, IV) | 86.7 | 364 | 13.3 | 56 |
| Unknown | 75.8 | 47 | 24.2 | 15 |
| Stage | ||||
| Stage I | 82.0 | 324 | 18.0 | 71 |
| Stage II | 86.5 | 402 | 13.6 | 63 |
| Stage IIIa | 87.9 | 146 | 12.1 | 20 |
a
p-value <.05 for chi-square test for association.
Asian/PI - Asian/Pacific Islander, AI/AN - American Indian/Alaska Native.