Table 2.
Cox model for overall survival among patients with primary retroperitoneal sarcoma surgically resected, excluding patients who received chemotherapy (n=4969).
| Description | Univariate model
|
Multivariate model
|
||||||
|---|---|---|---|---|---|---|---|---|
| HR | 95% CI | p value | HR | 95% CI | p value | |||
| Age (ref. ≤60) | <0.001 | <0.001 | ||||||
| >60 | 1.96 | 1.80 | 2.14 | 1.64 | 1.47 | 1.84 | ||
| Gender (ref. Male) | <0.001 | <0.001 | ||||||
| Female | 0.81 | 0.75 | 0.88 | 0.84 | 0.77 | 0.91 | ||
| Race (ref. White) | 0.003 | |||||||
| African American | 0.91 | 0.79 | 1.05 | |||||
| Asian/Pacific Islander | 0.71 | 0.56 | 0.88 | |||||
| Hispanic | 0.82 | 0.68 | 0.99 | |||||
| Insurance (ref. Private) | <0.001 | <0.001 | ||||||
| Medicare | 1.85 | 1.70 | 2.01 | 1.31 | 1.17 | 1.46 | ||
| Medicaid | 1.27 | 1.03 | 1.57 | 1.33 | 1.08 | 1.64 | ||
| Other Government | 1.07 | 0.67 | 1.70 | 1.11 | 0.70 | 1.77 | ||
| Not Insured | 1.40 | 1.09 | 1.81 | 1.37 | 1.06 | 1.77 | ||
| Tumor size (ref. ≤5 cm) | <0.001 | <0.001 | ||||||
| 5–10 cm | 1.07 | 0.90 | 1.26 | 1.03 | 0.87 | 1.22 | ||
| >10 cm | 1.29 | 1.11 | 1.49 | 1.28 | 1.11 | 1.48 | ||
| Margin (ref. R0/R1) | <0.001 | <0.001 | ||||||
| R2 | 2.34 | 1.94 | 2.83 | 2.45 | 2.02 | 2.96 | ||
| Unknown | 1.41 | 1.29 | 1.54 | 1.46 | 1.34 | 1.60 | ||
| Hospital volume (ref. >10/year) | <0.001 | 0.003 | ||||||
| ≤10/year | 1.27 | 1.07 | 1.51 | 1.30 | 1.10 | 1.55 | ||
| Received radiation therapy (ref. No) | 0.006 | <0.001 | ||||||
| Yes | 0.89 | 0.81 | 0.97 | 0.80 | 0.73 | 0.88 | ||
| Grade (ref. Low) | <0.001 | <0.001 | ||||||
| Intermediate/High | 2.05 | 1.88 | 2.23 | 2.24 | 2.05 | 2.45 | ||
R0/R1: complete gross resection
R2: incomplete gross resection