Table 1.
Patient clinical and demographic characteristics
| Covariate | Statistics | Level | Radiation group | Parametric P-valuea | |
|---|---|---|---|---|---|
| SBRT N = 558 | EBRT N = 40,797 | ||||
| Race | N (Col %) | White | 415 (75.73) | 32,076 (79.47) | 0.07 |
| N (Col %) | Black | 114 (20.8) | 6923 (17.15) | ||
| N (Col %) | Other | 19 (3.47) | 1363 (3.38) | ||
| Facility Type | N (Col %) | Non-academic program | 237 (42.47) | 28,382 (69.57) | <.001 |
| N (Col %) | Academic program | 321 (57.53) | 12,415 (30.43) | ||
| Median Income Quartiles | N (Col %) | < $30,000 | 76 (14.07) | 5527 (13.96) | <.001 |
| N (Col %) | $30,000 - $34,999 | 60 (11.11) | 7315 (18.47) | ||
| N (Col %) | $35,000 - $45,999 | 130 (24.07) | 11,117 (28.07) | ||
| N (Col %) | > = $46,000 | 274 (50.74) | 15,643 (39.5) | ||
| Year of diagnosis | N (Col %) | 2004–06 | 92 (16.49) | 8811 (21.6) | <.001^ |
| N (Col %) | 2007–09 | 109 (19.53) | 9121 (22.36) | ||
| N (Col %) | 2010–12 | 127 (22.76) | 10,852 (26.6) | ||
| N (Col %) | 2013–15 | 230 (41.22) | 12,013 (29.45) | ||
| Insurance status | N (Col %) | Not Insured | 12 (2.2) | 744 (1.85) | 0.787 |
| N (Col %) | Private | 146 (26.79) | 10,563 (26.25) | ||
| N (Col %) | Government insurance | 387 (71.01) | 28,931 (71.9) | ||
| Facility Location | N (Col %) | Northeast | 188 (33.69) | 10,369 (25.42) | <.001 |
| N (Col %) | South | 155 (27.78) | 13,291 (32.58) | ||
| N (Col %) | Midwest | 112 (20.07) | 10,751 (26.35) | ||
| N (Col %) | West | 103 (18.46) | 6386 (15.65) | ||
| Risk group | N (Col %) | Unfavorable intermediate | 130 (23.3) | 5094 (12.49) | <.001 |
| N (Col %) | High | 428 (76.7) | 35,703 (87.51) | ||
| Distance to facility | N (Col %) | 0–10 miles | 250 (44.88) | 22,460 (55.25) | <.001 |
| N (Col %) | 10–50 miles | 212 (38.06) | 15,550 (38.25) | ||
| N (Col %) | 50+ miles | 95 (17.06) | 2641 (6.5) | ||
| Charlson comorbidity score | N (Col %) | 0 | 472 (84.59) | 34,616 (84.85) | 0.197 |
| N (Col %) | 1 | 74 (13.26) | 4825 (11.83) | ||
| N (Col %) | 2+ | 12 (2.15) | 1356 (3.32) | ||
| Urban/Rural Location | N (Col %) | Metro | 439 (82.06) | 31,912 (80.12) | 0.022 |
| N (Col %) | Urban | 92 (17.2) | 6854 (17.21) | ||
| N (Col %) | Rural | 4 (0.75) | 1064 (2.67) | ||
| Age at Diagnosis | N | 558 | 40,797 | 0.980 | |
| Mean | 70.18 | 70.19 | |||
| Median | 71 | 71 | |||
| Min | 43 | 40 | |||
| Max | 90 | 90 | |||
| Std Dev | 7.95 | 7.91 | |||
a Parametric p-value calculated by ANOVA for numerical covariates and chi-square test for categorical covariates
^ P-value calculated by Cochran-Armitage test for trend