Table A1.
Comparison of characteristics of patients excluded due to missing stage with the final study sample
| Analysis sample (N = 60, 621) | Missing stage (N = 24, 867) | |
|---|---|---|
| Treatment | 4063 (7) | 5292 (21) |
| Definitive chemoradiation | 25,977 (43) | 8738 (35) |
| Chemoradiation plus surgery | 23,151 (38) | 5980 (24) |
| Surgery only | 7430 (12) | 4857 (20) |
| Race | ||
| White | 53,145 (88) | 21,482 (86) |
| Black | 5306 (9) | 2479 (10) |
| Other | 1510 (2) | 595 (2) |
| Age, years, median (IQR) | 66 (59–75) | 68 (59–78) |
| Sex | ||
| Male | 47,405 (78) | 18,752 (75) |
| Female | 13,216 (22) | 6115 (25) |
| Charlson–Deyo score, n (%) | ||
| 0 | 44,541 (73) | 17,944 (72) |
| 1 | 12,200 (20) | 5011 (20) |
| 2 | 2856 (5) | 1385 (6) |
| 3+ | 1024 (2) | 527 (2) |
| Primary insurance, n (%) | ||
| Private | 20,755 (34) | 7809 (31) |
| Medicaid | 3910 (6) | 1471 (6) |
| Medicare | 31,815 (52) | 13,846 (56) |
| Uninsured | 1725 (3) | 796 (3) |
| Travel distance, miles, n (%) | ||
| <5 miles | 15,094 (25) | 7303 (29) |
| 5–11.9 miles | 14,509 (24) | 6182 (25) |
| 12–31.9 miles | 14,844 (24) | 5555 (22) |
| ≥32 miles | 15,258 (25) | 5264 (21) |
| Median residential income†, n (%) | ||
| Less than $38,000 | 10,574 (17) | 4681 (19) |
| $38,000–$47,999 | 14,567 (24) | 6081 (24) |
| $48,000–$62,999 | 16,227 (27) | 6622 (27) |
| $63,000 or more | 18,300 (30) | 6900 (28) |
| Education, % without high school degree‡, n (%) | ||
| <7% | 14,086 (23) | 5275 (21) |
| 7–12.9% | 20,557 (34) | 8183 (33) |
| 13%-20.9% | 15,659 (26) | 6569 (26) |
| ≥21% | 9406 (16) | 4282 (17) |
† Median residential household income of each patient's ZIP code was estimated using the 2012 American Community Survey.
‡Proportion of adults in patient's ZIP code who did not complete high school, measured in the 2012 American Community Survey.