Table 5.
Racial disparities among breast cancer patients and the odds of late receipt of radiation (post-chemotherapy), Retrospective Cohort of South Carolina Cancer Registry, 2002 to 2010.
| Stratum | Race | Total n(%) |
Early receipt (<135 days) 188(49.0%) |
Late receipt (≥135 days) 196(51.0%) |
Crude OR* | Adjusted OR Full model** |
Adjusted OR Final model*** |
|---|---|---|---|---|---|---|---|
| Overall | |||||||
| White | 274(71.4) | 138(50.4) | 136(49.6) | Reference | Reference | Reference | |
| Black | 110(28.7) | 50(45.4) | 60(54.6) | 1.2(0.8-1.9) | 1.2(0.7-2.0) | 1.3(0.8-2.2) | |
| Married | |||||||
| Yes | White | 192(55.0) | 95(49.5) | 97(50.5) | Reference | Reference | Reference |
| Yes | Black | 50(14.3) | 28(56.0) | 22(44.0) | 0.8(0.4-1.4) | 0.7(0.4-1.5) | 0.9(0.4-1.7) |
| No | White | 57(16.3) | 27(47.4) | 30(52.6) | 1.1(0.6-2.0) | 1.2(0.6-2.5) | 1.2(0.7-2.3) |
| No | Black | 50(14.3) | 19(38.0) | 31(62.0) | 1.6(0.8-3.0) | 1.8(0.9-3.8) | 2.0(1.0-4.0) |
| Diagnosis year | |||||||
| 2008-2010 | White | 91(23.7) | 47(51.7) | 44(48.4) | Reference | Reference | Reference |
| 2008-2010 | Black | 40(10.4) | 14(35.0) | 26(65.0) | 1.9(0.9-4.3) | 1.7(0.7-3.9) | 1.9(0.8-4.2) |
| 2005-2007 | White | 90(23.4) | 43(47.8) | 47(52.2) | 1.2(0.7-2.1) | 0.9(0.5-1.7) | 0.9(0.5-1.6) |
| 2005-2007 | Black | 34(8.9) | 20(58.8) | 14(41.2) | 0.7(0.3-1.7) | 0.6(0.3-1.5) | 0.7(0.3-1.7) |
| 2002-2004 | White | 93(24.2) | 48(51.6) | 45(48.4) | 1.0(0.6-1.8) | 0.9(0.5-1.8) | 0.9(0.5-1.6) |
| 2002-2004 | Black | 36(9.4) | 16(44.4) | 20(55.6) | 1.3(0.6-2.9) | 1.3(0.6-3.0) | 1.4(0.6-3.1) |
| Distance | |||||||
| <=10 miles | White | 90(27.3) | 45(50.0) | 45(50.0) | Reference | Reference | Reference |
| <=10 miles | Black | 39(11.8) | 12(30.8) | 27(69.2) | 2.2(1.0-5.0) | 2.4(1.0-5.8) | 2.6(1.1-6.1) |
| >10 miles | White | 143(43.3) | 71(49.7) | 72(50.4) | 1.0(0.6-1.7) | 1.1(0.6-1.9) | 1.1(0.6-1.9) |
| >10 miles | Black | 58(17.6) | 32(55.2) | 26(44.8) | 0.8(0.4-1.6) | 0.8(0.4-1.7) | 0.8(0.4-1.8) |
| Chemotherapy date | |||||||
| Early | White | 158(41.2) | 73(46.2) | 85(53.8 | Reference | Reference | Reference |
| Early | Black | 56(14.6) | 19(33.3) | 37(66.1) | 1.7(0.9-3.2) | 1.8(0.8-3.6) | 1.8(0.9-3.6) |
| Late | White | 116(30.2) | 65(56.0) | 51(44.0) | 0.7(0.4-1.1) | 0.8(0.4-1.1) | 0.7(0.4-1.0) |
| Late | Black | 54(14.1) | 31(57.4) | 23(42.6) | 0.6(0.3-1.2) | 0.5(0.3-1.0) | 0.6(0.3-1.2) |
*
Crude model with race as only predictor for time to radiation (post-chemotherapy)
**
Full model with race as main predictor for time to chemotherapy with confounders: age, urban status, cancer stage, cancer grade, BCN enrollment, insurance provider, time to surgery and time to chemotherapy.
***
Final model with race as main predictor for time to surgery with select confounders based on backward selection in SAS: cancer stage, time to surgery, time to chemotherapy and BCN enrollment.