Table 2.
Frequency of delayed treatment initiation and prolonged treatment duration by race, age, and latent classes of SES and access to care in Carolina Breast Cancer Study 3 (2008-2013)
| Treatment initiation | Treatment durationa | |||||||
|---|---|---|---|---|---|---|---|---|
| ≤60 days | >60 days | Q1-3 | Q4 | |||||
| No. | (%) | No. | (%) | No. | (%) | No. | (%) | |
| Raceb | ||||||||
| White | 1333 | (92.1) | 115 | (7.9) | 1143 | (78.9) | 305 | (21.1) |
| Black | 1206 | (86.6) | 187 | (13.4) | 976 | (70.1) | 417 | (29.9) |
| Black vs. white, RFD (95% CI) | ref | 5.5% (3.2, 7.8) | ref | 8.8% (5.7, 12.0) | ||||
| Agec | ||||||||
| Older | 1272 | (89.3) | 153 | (10.7) | 1086 | (76.2) | 339 | (23.8) |
| Younger | 1267 | (89.5) | 149 | (10.5) | 1033 | (73.0) | 383 | (27.0) |
| Younger vs. older, RFD (95% CI) | ref | 0.3% (−1.9, 2.5) | ref | 3.2% (0.1, 6.3) | ||||
| SES latent classesd | ||||||||
| High SES | 1378 | (91.6) | 127 | (8.4) | 1192 | (79.2) | 313 | (20.8) |
| Low SES | 1161 | (86.9) | 175 | (13.1) | 927 | (69.4) | 409 | (30.6) |
| Low vs. High, RFD (95% CI) | ref | 3.5% (1.2, 5.9) | ref | 8.1% (4.7, 11.5) | ||||
| Access to care latent classesd | ||||||||
| Fewer Barriers to Care | 2311 | (89.8) | 264 | (10.2) | 1954 | (75.9) | 621 | (24.1) |
| More Barriers to Care | 227 | (85.7) | 38 | (14.3) | 164 | (61.9) | 101 | (38.1) |
| Low vs. high, RFD (95% CI) | ref | 2.8% (−1.6, 7.2) | ref | 11.7% (5.5, 17.8) | ||||
a
Quartiles were separately defined by modality and Q4 was equal to 56, 74, 119 days for radiation, definitive surgery, and chemotherapy modalities, respectively
b
Multivariate models adjusting for age
c
Multivariate models adjusting for race
d
Multivariate models adjusting for race and age
Abbreviations: CI, confidence interval; RFD, relative frequency difference; SES, socioeconomic status