Multivariate analysis
| Factors | HR | 95% CI | P value |
| Surgical method | |||
| Open | Ref | ||
| Laparoscopic | 1.09 | 0.83 to 1.44 | 0.538 |
| Robotic | 1.00 | 0.82 to 1.21 | 0.970 |
| Facility type | |||
| Community cancer program | Ref | ||
| Comprehensive community cancer program | 1.00 | 0.57 to 1.75 | 0.996 |
| Academic/research program | 0.97 | 0.55 to 1.70 | 0.906 |
| Integrated network cancer program | 0.81 | 0.45 to 1.46 | 0.485 |
| Region | |||
| Northeast | Ref | ||
| Midwest | 1.21 | 0.95 to 1.53 | 0.118 |
| South | 0.86 | 0.67 to 1.10 | 0.234 |
| West | 1.07 | 0.79 to 1.45 | 0.676 |
| Race | |||
| White | Ref | ||
| Black | 1.59 | 1.25 to 2.02 | 0.000 |
| Hispanic | 0.86 | 0.55 to 1.32 | 0.481 |
| Asian/Pacific Islander | 1.15 | 0.65 to 2.02 | 0.629 |
| Other/unknown | 1.00 | 0.47 to 2.11 | 0.991 |
| Insurance or not | |||
| No | Ref | ||
| Yes | 0.99 | 0.60 to 1.63 | 0.966 |
| Unknown | 0.80 | 0.26 to 2.43 | 0.694 |
| No high school degree 2008–2012, % | |||
| ≥13% | Ref | ||
| <13% | 1.10 | 0.90 to 1.33 | 0.352 |
| Charlson–-Deyo Comorbidity Index Score | |||
| 0 | Ref | ||
| ≥1 | 1.45 | 1.21 to 1.75 | 0.000 |
| Surgical field | |||
| Simple hysterectomy | Ref | ||
| Radical hysterectomy | 0.92 | 0.70 to 1.22 | 0.567 |
| Histology | |||
| Endometrioid carcinoma | Ref | ||
| Serous carcinoma | 0.89 | 0.66 to 1.20 | 0.442 |
| Clear cell carcinoma | 0.71 | 0.43 to 1.17 | 0.180 |
| Carcinosarcoma | 1.70 | 1.29 to 2.24 | 0.000 |
| Grade | |||
| Well differentiated | Ref | ||
| Moderately differentiated | 1.50 | 1.03 to 2.20 | 0.037 |
| Poorly differentiated | 3.12 | 2.13 to 4.57 | 0.000 |
| Unknown | 1.58 | 1.02 to 2.45 | 0.041 |
| Tumor size (cm) | |||
| <2 | Ref | ||
| ≥2 and <4 | 0.94 | 0.63 to 1.39 | 0.754 |
| ≥4 | 1.17 | 0.80 to 1.69 | 0.418 |
| Unknown | 1.23 | 0.81 to 1.87 | 0.326 |
| Lymphovascular invasion | |||
| No | Ref | ||
| Yes | 1.71 | 1.42 to 2.06 | 0.000 |
| Unknown | 0.88 | 0.60 to 1.30 | 0.528 |
| Surgical margin | |||
| Negative | Ref | ||
| Positive | 1.27 | 0.78 to 2.07 | 0.343 |
| Unknown | 1.11 | 0.77 to 1.60 | 0.566 |
| Adjuvant therapy | |||
| No | Ref | ||
| Chemotherapy only | 0.79 | 0.58 to 1.08 | 0.135 |
| Radiation therapy only | 0.69 | 0.54 to 0.87 | 0.002 |
| Radiation therapy and chemotherapy | 0.63 | 0.48 to 0.82 | 0.001 |
| Unknown | 0.87 | 0.57 to 1.34 | 0.539 |