From: A method to predict breast cancer stage using Medicare claims
Predictor Variable | % of All Patients |
---|---|
Demographic | |
Age, mean (SD) | 76 (7) |
White race | 94 |
Stage | |
Stage I | 51 |
Stage II | 26 |
Stage III | 10 |
Stage IV | 4 |
Stages I-III but T or N unknown | 9 |
Extent of disease a | |
Axillary LN involvement | 19 |
Metastatic disease | 14 |
Cancer treatment a | |
No. visits to surgeon, mean (SD) | 4 (3) |
No. visits to medical oncologist, mean (SD) | 4 (9) |
No. visits to radiation oncologist, mean (SD) | 3 (5) |
Imaging (CT, MRI, PET, or bone scan) | 25 |
Radiation therapy | 44 |
Breast conserving surgery | 45 |
Mastectomy | 49 |
Axillary LN dissection | 72 |
Chemotherapy (any agent) | 18 |
Doxorubicin | 7 |
Paclitaxel | 3 |
No. physician visits, mean (SD) | 14 (12) |
Screening mammography | 78 |
Influenza vaccine | 34 |
General health status a | |
No. hospital admission for any cause, mean (SD) | 1 (1) |
Charlson comorbidity score | |
0 comorbid conditions | 69 |
1 comorbid condition | 18 |
2 or more comorbid conditions | 8 |
Unknown | 5 |