Table 3.
Frequency of delayed treatment initiation and prolonged treatment duration by race, and latent classes of SES and access to care in Carolina Breast Cancer Study 3 (2008-2013)a
| Treatment initiation | Treatment durationb | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| White |
Black |
White |
Black |
|||||||||||||
| ≤60 days | >60 days | ≤60 days | >60 days | Q1-Q3 | Q4 | Q1-Q3 | Q4 | |||||||||
| No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | No. | (%) | |
| SES latent classes | ||||||||||||||||
| High SES | 927 | (93.3) | 67 | (6.7) | 451 | (88.3) | 60 | (11.7) | 808 | (81.3) | 186 | (18.7) | 384 | (75.1) | 127 | (24.9) |
| Low SES | 406 | (89.4) | 48 | (10.6) | 755 | (85.6) | 127 | (14.4) | 335 | (73.8) | 119 | (26.2) | 592 | (67.1) | 290 | (32.9) |
| Low vs. high, RFD (95% CI) | ref | 3.5% (1.1, 5.9) | ref | 2.4% (−1.3, 6.0) | ref | 8.1% (4.7, 11.5) | ref | 8.4% (3.5, 13.3) | ||||||||
| Access to care latent classesc | ||||||||||||||||
| Fewer Barriers to Care | 1259 | (92.2) | 107 | (7.8) | 1052 | (87.0) | 157 | (13.0) | 1084 | (79.4) | 263 | (20.6) | 870 | (72.0) | 339 | (28.0) |
| More Barriers to Care | 74 | (90.2) | 8 | (9.8) | 153 | (83.6) | 30 | (16.4) | 59 | (71.9) | 28 | (28.1) | 105 | (57.4) | 78 | (42.6) |
| More vs. fewer, RFD (95% CI) | ref | 2.8% (−1.6, 7.2) | ref | 3.6% (−2.1, 9.3) | ref | 11.7% (5.5, 17.8) | ref | 14.1% (6.5, 21.8) | ||||||||
a
Multivariate models adjusting for age
b
Quartiles were separately defined by modality and Q4 was equal to 56, 74, 119 days for radiation, definitive surgery, and chemotherapy modalities, respectively
c
n=2840
Abbreviations: CI, confidence interval; RFD, relative frequency difference; SES, socioeconomic status