Table 3.
Availability of Imaging-Guided Biopsy Services by Breast Cancer Surveillance Consortium Facility Characteristic
| Any Guided Biopsy Services | Stereotactic Guided Biopsy | Ultrasound Guided Biopsy | MR Guided Biopsy | ||
|---|---|---|---|---|---|
| Number of facilities providing non- missing data on use of this technology | 104 | 104 | 104 | 104 | |
| Facility Characteristics | N | ||||
| Profit / Not for profit status | |||||
| For profit | 22 | 7 (31.8%; 13.6, 58.1) | 5 (22.7%; 7.7, 50.9) | 7 (31.8%; 13.6, 58.1) | 3 (13.6%; 3.3, 42.1) |
| Not for profit | 62 | 40 (64.5%; 47.7, 78.4) | 32 (51.6%; 35.1, 67.8) | 39 (62.9%; 48.6, 75.3) | 20 (32.3%; 21.7, 44.9) |
| Unknown | 20 | 15 (75.0%; 48.3, 90.6) | 9 (45.0%; 25.0, 66.7) | 15 (75.0%; 48.3, 90.6) | 6 (30.0%; 11.2, 59.3) |
| P value* | 0.028 | 0.076 | 0.030 | 0.23 | |
| Academic medical center status | |||||
| Yes | 8 | 6 (75.0%; 31.7, 95.1) | 6 (75.0%; 31.7, 95.1) | 6 (75.0%; 31.7, 95.1) | 6 (75.0%; 31.7, 95.1) |
| No | 96 | 56 (58.3%; 44.2, 71.2) | 40 (41.7%; 29.3, 55.2) | 55 (57.3%; 44.4, 69.3) | 23 (24.0%; 17.1, 32.5) |
| P value | 0.45 | 0.14 | 0.42 | 0.019 | |
| Facility type | |||||
| Multi-specialty breast center | 25 | 24 (96.0%; 75.7, 99.5) | 23 (92.0%; 70.9, 98.2) | 24 (96.0%; 75.7, 99.5) | 17 (68.0%; 36.9, 88.5) |
| Full diagnostic radiology practice | 65 | 38 (58.5%; 39.5, 75.2) | 23 (35.4%; 17.4, 58.8) | 37 (56.9%; 40.1, 72.3) | 12 (18.5%; 10.8, 29.7) |
| Breast imaging only | 4 | 0/4 (0%) | 0/4 (0%) | 0/4 (0%) | 0/4 (0%) |
| Non-radiology practice | 10 | 0/10 (0%) | 0/10 (0%) | 0/10 (0%) | 0/10 (0%) |
| P value† | 0.011 | 0.0012 | 0.0089 | 0.0063 | |
Results reflect the number of facilities which reported providing the imaging service in question (columns) within each category of the facility characteristic (row). Percentages are based on observed frequencies divided by the denominators shown in the column marked “N”. The 95% confidence intervals are derived via delta method from post-estimation predicted probability estimates obtained from unadjusted GEE models of the outcome regressed on the corresponding facility characteristic. Models accommodate the non-independence of facilities belonging to the same practice.
All p values are from joint Wald tests of parameters estimated by GEE modeling for each descriptive variable.
P-values shown for profit status were obtained from models restricted to facilities with non-missing profit status information.
P-values shown for facility type were obtained from models restricted to multi-specialty breast centers and full diagnostic radiology practices, except in the case of the provision of any ultrasound, for which modeling was restricted to full diagnostic, breast imaging only, and non-radiology practices.