Facility characteristics and travel distance
| <25 miles n=77 749 (67) | 25–50 miles n=17 714 (15) | >50–100 miles n=12 817 (11) | >100 miles n=7260 (6) | P value | |
| Facility location | <0.0001 | ||||
| Northeast | 16 999 (23) | 2993 (18) | 1460 (12) | 551 (8) | |
| South | 19 113 (26) | 5781 (34) | 4298 (35) | 1633 (24) | |
| Midwest | 23 504 (32) | 5762 (34) | 4741 (39) | 2784 (40) | |
| West | 13 558 (19) | 2256 (13) | 1700 (14) | 1933 (28) | |
| Facility type | <0.0001 | ||||
| Community cancer program | 3227 (4) | 245 (2) | 78 (0.6) | 112 (2) | |
| Comprehensive community cancer program | 30 015 (41) | 5977 (36) | 4068 (33) | 2179 (32) | |
| Academic/research program | 30 579 (42) | 8669 (52) | 7035 (58) | 4158 (60) | |
| Integrated network cancer program | 9353 (13) | 1901 (11) | 1018 (8) | 461 (7) | |
| Facility volume (cases per year) | <0.0001 | ||||
| <9 | 16 184 (21) | 1736 (10) | 690 (5) | 480 (7) | |
| 9–20 | 22 986 (30) | 4214 (24) | 2529 (20) | 1384 (19) | |
| 21–34 | 20 175 (26) | 5172 (29) | 3554 (28) | 1944 (27) | |
| ≥35 | 18 404 (24) | 6592 (37) | 6044 (47) | 3452 (48) | |
Data are means unless otherwise specified.
*Wilcoxon rank sum for continuous variables, Pearson’s χ2 for categorical variables.