Table 1.
Sample characteristics of colorectal cancer patients, by emergency diagnosis and emergency surgery status
| Diagnosis (n = 83,330) a | Surgery (n = 55,046) a | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Characteristic | No emergency diagnosis (n = 59,082) | Emergency diagnosis (n = 24,248) | p (Chi 2 ) | No emergency surgery (n = 40,740) | Emergency surgery (n = 14,306) | p (Chi 2 ) | ||||
| n | % | n | % | n | % | n | % | |||
| Race | ||||||||||
| White | 54527 | 71.90 | 21313 | 28.10 | <.0001 | 37957 | 75.01 | 12643 | 24.99 | <.0001 |
| African American | 4555 | 60.81 | 2935 | 39.19 | 2783 | 62.60 | 1663 | 37.40 | ||
| Neighborhood poverty rate | ||||||||||
| <10% | 35999 | 71.72 | 14198 | 28.28 | <.0001 | 25254 | 74.81 | 8505 | 25.19 | <.0001 |
| 10-19.9% | 14902 | 71.98 | 5801 | 28.02 | 10170 | 75.09 | 3374 | 24.91 | ||
| ≥20% | 8181 | 65.82 | 4249 | 34.18 | 5316 | 68.66 | 2427 | 31.34 | ||
| Sex | ||||||||||
| Male | 27154 | 73.36 | 9860 | 26.64 | <.0001 | 18215 | 75.71 | 5843 | 24.29 | <.0001 |
| Female | 31928 | 68.94 | 14388 | 31.06 | 22525 | 72.69 | 8463 | 27.31 | ||
| Age (mean [SD]) | 77.2 | 7.1 | 79.6 | 7.6 | <.0001 | 76.8 | 6.8 | 78.9 | 7.4 | <.0001 |
| Year | ||||||||||
| 1992-1996 | 24621 | 70.68 | 10214 | 29.32 | 0.4126 | 9311 | 74.05 | 3263 | 25.95 | 0.9327 |
| 1997-2001 | 13092 | 71.21 | 5292 | 28.79 | 14847 | 74.08 | 5195 | 25.92 | ||
| 2002-2005 | 21369 | 70.97 | 8742 | 29.03 | 16582 | 73.93 | 5848 | 26.07 | ||
| Medicaid enrollee | ||||||||||
| No | 52170 | 72.54 | 19753 | 27.46 | <.0001 | 36395 | 75.51 | 11802 | 24.49 | <.0001 |
| Yes | 6912 | 60.59 | 4495 | 39.41 | 4345 | 63.44 | 2504 | 36.56 | ||
| Rural urban commuting area | ||||||||||
| Metropolitan | 46093 | 69.38 | 20346 | 30.62 | <.0001 | 31657 | 72.45 | 12037 | 27.55 | <.0001 |
| Micropolitan | 5246 | 76.23 | 1636 | 23.77 | 3595 | 78.91 | 961 | 21.09 | ||
| Rural | 7743 | 77.36 | 2266 | 22.64 | 5488 | 80.75 | 1308 | 19.25 | ||
| Stage | ||||||||||
| Local | 25470 | 78.60 | 6936 | 21.40 | <.0001 | 17622 | 79.48 | 4549 | 20.52 | <.0001 |
| Regional | 20160 | 69.12 | 9006 | 30.88 | 16936 | 72.69 | 6363 | 27.31 | ||
| Distant | 9840 | 60.94 | 6307 | 39.06 | 5436 | 64.66 | 2971 | 35.34 | ||
| Tumor location | ||||||||||
| Left | 31557 | 73.93 | 11127 | 26.07 | <.0001 | 20204 | 75.47 | 6568 | 24.53 | <.0001 |
| Right | 25162 | 68.09 | 11790 | 31.91 | 19953 | 73.04 | 7366 | 26.96 | ||
| Tumor Grade | ||||||||||
| Low | 40222 | 72.40 | 15337 | 27.60 | <.0001 | 30066 | 75.09 | 9976 | 24.91 | <.0001 |
| High | 10551 | 68.11 | 4941 | 31.89 | 8134 | 72.08 | 3150 | 27.92 | ||
| Histology | ||||||||||
| Other adenocarcinoma | 49541 | 71.73 | 19526 | 28.27 | <.0001 | 35208 | 74.46 | 12078 | 25.54 | <.0001 |
| Mucinous adenocarcinoma/signet ring cell | 6252 | 68.95 | 2816 | 31.05 | 4920 | 73.01 | 1819 | 26.99 | ||
| Other | 2365 | 64.09 | 1325 | 35.91 | 544 | 61.40 | 342 | 38.60 | ||
| Comorbidity | ||||||||||
| 0 | 34535 | 73.76 | 12284 | 26.24 | <.0001 | 24359 | 76.19 | 7613 | 23.81 | <.0001 |
| 1 | 14000 | 69.73 | 6077 | 30.27 | 9889 | 73.86 | 3500 | 26.14 | ||
| ≥2 | 9628 | 62.06 | 5887 | 37.94 | 6492 | 67.03 | 3193 | 32.97 | ||
| Preventable hospitalization | ||||||||||
| No | 55900 | 72.62 | 21077 | 27.38 | <.0001 | 38522 | 75.20 | 12704 | 24.80 | <.0001 |
| Yes | 3182 | 50.09 | 3171 | 49.91 | 2218 | 58.06 | 1602 | 41.94 | ||
| Prior hospitalization | <.0001 | |||||||||
| No | 38866 | 82.62 | 8178 | 17.38 | 23910 | 82.93 | 4920 | 17.07 | ||
| Yes | 20216 | 55.71 | 16070 | 44.29 | 16830 | 64.20 | 9386 | 35.80 | ||
| Endoscopies/prior year | ||||||||||
| None | 32028 | 67.93 | 15118 | 32.07 | <.0001 | 19435 | 69.11 | 8685 | 30.89 | <.0001 |
| 1 | 16806 | 75.27 | 5521 | 24.73 | 13345 | 80.29 | 3277 | 19.71 | ||
| ≥2 | 10248 | 73.96 | 3609 | 26.04 | 7960 | 77.25 | 2344 | 22.75 | ||
aNumbers may not add up to total due to missing data.