| Sample | % |  | Sample | % |
---|---|---|---|---|---|
Stratification characteristics | |||||
Places | Â | Â | Poverty prevalence (%) in neighborhoods | ||
  Large urban | 2,100  | 33.3 |  < 5 | 2,100  | 33.3 |
  Smaller urban | 2,100  | 33.3 |  5–29 | 2,100  | 33.3 |
  Rural | 2,100  | 33.3 |  ≥ 30 | 2,100  | 33.3 |
Age and primary payer characteristics | |||||
Age at diagnosis, y | Â | Â | Primary payers | Â | Â |
  25–44 | 904  | 14.3 |  Private insurers | 3,376  | 53.6 |
  45–54 | 1,386  | 22.0 |  Medicare | 1,777  | 28.2 |
  55–64 | 1,344  | 21.3 |  Medicaid | 465  |   7.4 |
  65–74 | 1,375  | 21.8 |  Uninsured | 685  | 10.9 |
  ≥ 75 | 1,291  | 20.5 |  |  |  |
Staging characteristics at diagnosis | |||||
Summary stage | Â | Â | Size of tumor, mm | Â | Â |
  Local-regional |  |  |  < 10 | 975  | 17.5 |
   Node negative | 4,035  | 66.2 |  10–19 | 2,035  | 36.6 |
   Node positive | 1,774  | 29.1 |  20–49 | 2,035  | 36.6 |
  Distally metastasized | 287  |   4.7 |  ≥ 50 | 512  |   9.2 |
  Missing data |  204   |   3.2 |  Missing data |  743  | 11.8 |
Tumor characteristics | |||||
Histological grade | Â | Â | Hormone receptor statuses | Â | Â |
  I, well differentiated | 1,134  | 21.1 |  Estrogen positive | 3,720  | 63.3 |
  II, moderately | 2,211  | 41.2 |  Progesterone positive | 3,189  | 54.3 |
  III/IV, poorly | 2,019  | 37.6 |  Either positive | 3,852  | 65.5 |
  Missing data | 936 | 14.9 |  Missing data | 422 |  6.7 |
Cancer care characteristics | |||||
Surgery received | Â | Â | Wait time from diagnosis to surgery, d | ||
  Lumpectomy | 3,025  | 48.4 |  ≤ 7 | 2,699  | 45.8 |
  Mastectomy | 2,876  | 46.0 |  8–30 | 2,011  | 34.1 |
  No surgery | 348 |  5.6 |  ≥ 31 | 1,187  | 20.1 |
  Missing data |  51 |  0.8 |  Missing data |  4  |   0.1 |
Received RT | 2,843   | 45.4   | Wait time after surgery for RT, d | ||
  Missing data |  44 | 0.7 |  ≤ 60a | 1190  | 42.9 |
 |  |  |  61–90 | 451   | 16.3 |
 |  |  |  91–180 | 687  | 24.8 |
 |  |  |  ≥ 181 | 446   | 16.1 |
 |  |  |  Missing data | 69 |   2.4 |
Received chemotherapy | 2,299  | 37.6 | Wait time after surgery for chemotherapy, d | ||
  Missing data | 185 |  2.9 |  ≤ 30b | 891  | 40.7 |
 |  |  |  31–60 | 839  | 38.3 |
 |  |  |  61–90 | 273  | 12.4 |
 |  |  |  ≥ 91 | 188  |   8.6 |
 |  |  |  Missing data | 108  |   4.7 |
Received HT | 2,115  | 34.7 | Wait time after surgery for HT, d | ||
  Missing data | 205 |   3.3 |  ≤ 30c | 701  | 34.7 |
 |  |  |  31–90 | 667  | 33.0 |
 |  |  |  91–180 | 408  | 20.2 |
 |  |  |  ≥ 181 | 247  | 12.2 |
 |  |  |  Missing data | 92  |   4.3 |