From: Representativeness of breast cancer cases in an integrated health care delivery system
Characteristic | KPNC (N = 36,109) % | Non-KPNC | All (N = 112,244) % | |
---|---|---|---|---|
All other hospitals (N = 68,330) % | Cancer centers (N = 7805) % | |||
Race | ||||
Non-Hispanic white | 70.6 | 74.4 | 71.1 | 73.0 |
Non-Hispanic black | 8.1 | 5.0 | 6.5 | 6.0 |
Hispanic | 7.5 | 7.0 | 5.4 | 7.0 |
Asian/Pacific Islander | 13.0 | 12.6 | 16.0 | 13.0 |
Non-Hisp Am Indian/Alas Native | 0.3 | 0.3 | 0.2 | 0.3 |
Other/unknown | 0.6 | 0.7 | 0.7 | 0.6 |
Age at diagnosis | ||||
< 30 | 0.3 | 0.4 | 0.8 | 0.4 |
30–39 | 3.6 | 4.6 | 7.2 | 4.5 |
40–49 | 16.9 | 18.9 | 23.1 | 18.5 |
50–59 | 26.1 | 24.3 | 27.5 | 25.1 |
60–69 | 25.3 | 20.6 | 20.4 | 22.1 |
70–79 | 19.0 | 19.1 | 13.7 | 18.7 |
80–89 | 7.8 | 10.6 | 6.5 | 9.4 |
90+ | 0.9 | 1.6 | 0.7 | 1.3 |
Insurance/payment source | ||||
Any public/Medicaid/military | 2.5 | 24.8 | 28.9 | 17.9 |
Private only | 92.4 | 52.7 | 55.1 | 65.7 |
Other (none, Medicare, unknown) | 3.3 | 22.5 | 16.0 | 16.4 |
AJCC stage | ||||
In situ | 17.0 | 19.3 | 22.1 | 18.7 |
Stage I | 41.6 | 38.9 | 36.9 | 39.6 |
Stage II | 29.7 | 28.3 | 26.7 | 28.6 |
Stage III | 5.8 | 6.6 | 6.7 | 6.3 |
Stage IV | 3.2 | 3.4 | 4.6 | 3.4 |
Unknown | 2.7 | 3.6 | 3.1 | 3.3 |
Tumor size | ||||
< 1 cm | 20.0 | 20.0 | 23.4 | 20.2 |
1–< 2 cm | 34.9 | 32.4 | 31.2 | 33.1 |
2–< 3 cm | 18.5 | 16.9 | 15.0 | 17.3 |
3–< 4 cm | 7.8 | 7.3 | 7.5 | 7.4 |
4+ cm | 8.7 | 10.7 | 12.6 | 10.2 |
Other | 3.2 | 3.3 | 2.9 | 3.2 |
Unknown | 6.8 | 9.5 | 7.4 | 8.5 |
Lymph node involvement | ||||
No nodal involvement | 71.1 | 71.4 | 71.4 | 71.3 |
Positive nodes | 25.5 | 24.9 | 24.3 | 25.1 |
Unknown | 3.4 | 3.7 | 4.3 | 3.6 |
Histology | ||||
Ductal | 73.2 | 76.0 | 72.0 | 74.8 |
Lobular | 17.2 | 14.3 | 16.3 | 15.4 |
Other | 9.6 | 9.7 | 11.7 | 9.8 |
Neighborhood SESb | ||||
Quintile 1 (lowest) | 4.2 | 6.5 | 3.5 | 5.5 |
Quintile 2 | 11.3 | 11.1 | 7.2 | 10.8 |
Quintile 3 | 19.2 | 18.1 | 13.7 | 18.1 |
Quintile 4 | 29.1 | 25.4 | 22.5 | 26.4 |
Quintile 5 (highest) | 36.2 | 39.0 | 53.2 | 39.1 |
% below povertyc | ||||
0–4.9 % | 45.9 | 45.5 | 45.8 | 45.7 |
5.0–9.9 % | 26.8 | 25.3 | 27.5 | 26.0 |
10.0–19.9 % | 19.2 | 19.0 | 17.4 | 18.9 |
≥ 20 % | 8.1 | 10.2 | 9.5 | 9.5 |
Urban/rural | ||||
Rural | 4.6 | 6.9 | 4.9 | 6.0 |
Small towns | 1.6 | 3.2 | 1.2 | 2.6 |
Small and medium size cities | 29.2 | 29.4 | 7.6 | 27.8 |
Suburban metropolitan areas | 53.5 | 48.9 | 57.7 | 51.1 |
Urban metropolitan areas | 11.1 | 11.5 | 28.6 | 12.5 |
Population densityb | ||||
Quartile 1 (low density) | 23.7 | 26.9 | 22.4 | 25.6 |
Quartile 2 | 31.2 | 31.1 | 25.5 | 30.8 |
Quartile 3 | 26.8 | 24.2 | 19.0 | 24.7 |
Quartile 4 (high density) | 18.3 | 17.8 | 33.1 | 18.9 |
Hispanic ethnic enclaveb | ||||
Quintile 1 (low enclave) | 22.7 | 25.1 | 24.8 | 24.3 |
Quintile 2 | 29.5 | 29.4 | 30.5 | 29.4 |
Quintile 3 | 27.6 | 24.7 | 25.7 | 25.7 |
Quintile 4 | 15.4 | 14.8 | 14.6 | 14.9 |
Quintile 5 (high enclave) | 4.8 | 5.7 | 4.2 | 5.3 |
Unknown | 0.3 | 0.3 | 0.1 | 0.3 |
Asian ethnic enclaveb | ||||
Quintile 1 (low enclave) | 7.1 | 9.3 | 5.3 | 8.3 |
Quintile 2 | 16.2 | 16.9 | 13.3 | 16.5 |
Quintile 3 | 21.6 | 21.7 | 19.4 | 21.5 |
Quintile 4 | 24.9 | 24.0 | 23.5 | 24.3 |
Quintile 5 (high enclave) | 29.8 | 27.8 | 38.4 | 29.2 |
Unknown | 0.3 | 0.3 | 0.1 | 0.3 |
% Hispanic populationb | ||||
< 9 % | 38.5 | 43.1 | 57.6 | 42.7 |
9–20 % | 36.5 | 31.1 | 27.4 | 32.6 |
21–47 % | 20.1 | 19.2 | 11.9 | 19.0 |
> 47 % | 4.9 | 6.5 | 3.1 | 5.8 |
% non-Hispanic Asian populationb | ||||
< 2 % | 9.1 | 11.4 | 6.4 | 10.3 |
2–4 % | 22.4 | 22.4 | 16.1 | 22.0 |
5–12 % | 29.0 | 29.0 | 28.2 | 29.0 |
> 12 % | 39.5 | 37.2 | 49.3 | 38.7 |
% non-Hispanic White populationb | ||||
< 23 % | 12.1 | 10.9 | 10.4 | 11.2 |
23–53 % | 26.6 | 24.2 | 24.7 | 25.0 |
54–75 % | 31.7 | 31.4 | 30.3 | 31.4 |
> 75 % | 29.6 | 33.5 | 34.5 | 32.3 |
% non-Hispanic Black populationb | ||||
0 % | 20.7 | 25.8 | 25.7 | 24.2 |
0.1–1.8 % | 23.0 | 24.9 | 26.6 | 24.4 |
1.9–6 % | 28.3 | 27.2 | 26.4 | 27.5 |
> 6 % | 28.0 | 22.1 | 21.4 | 23.9 |