Table 1.
Patient and tumor characteristics by treatment in stage I anal squamous cell carcinoma (2004-2015)
| N (%) | ||||
|---|---|---|---|---|
| All (n=883) | CRT (n=683) | LE (n=200) | P value* | |
| Age, mean (SD) | 60 (12) | 60 (11) | 60 (13) | 0.74 |
| Sex | <0.0001 | |||
| Female | 570 (65%) | 68% | 52% | |
| Male | 310 (35%) | 32% | 48% | |
| Race | 0.01 | |||
| Black | 68 (8%) | 6% | 12% | |
| White | 790 (90%) | 91% | 85% | |
| Other | 22 (2%) | 2% | 3% | |
| Marital Status | 0.02 | |||
| Married | 390 (44%) | 46% | 37% | |
| Unmarried/unknown | 490 (56%) | 54% | 63% | |
| Insurance | 0.51 | |||
| Insured | 597 (68%) | 69% | 65% | |
| Medicaid | 85 (10%) | 9% | 12% | |
| Uninsured | 21 (2%) | 2% | 3% | |
| Unknown | 177 (20%) | 20% | 20% | |
| Metropolitan residence | 0.65 | |||
| Yes | 778 (88%) | 89% | 88% | |
| No | 102 (12%) | 11% | 12% | |
| Tumor Grade | <0.0001 | |||
| Well differentiated | 150 (17%) | 12% | 34% | |
| Moderately differentiated | 301 (34%) | 36% | 28% | |
| Poorly differentiated/undifferentiated | 198 (23%) | 26% | 10% | |
| Unknown | 231 (26%) | 25% | 28% | |
| Tumor Size | <0.0001 | |||
| ≤ 1 cm | 313 (35%) | 29% | 59% | |
| >1 to 2 cm | 489 (56%) | 61% | 37% | |
| Unknown | 79 (9%) | 10% | 4% | |
Abbreviations: CRT=chemoradiation; LE=local excision; SD=standard deviation
*
Chi2 test excluded unknown values