Table 3 Multivariable analysis for factors associated with receiving any type of radiation therapy
From: Radiation therapy for retroperitoneal sarcoma: practice patterns in North America
Odds ratio | Confidence interval | p value | |
|---|---|---|---|
Age | 0.984 | 0.979–0.989 | < 0.0001 |
Sex | |||
Female | Reference | ||
Male | 1.101 | 0.979–1.24 | NS |
Race | |||
Caucasian | Reference | ||
African American | 1.023 | 0.926–1.266 | NS |
Asian | 1.135 | 0.772–1.668 | NS |
Other | 0.671 | 0.360–1.250 | NS |
Unknown | 0.818 | 0.379–1.769 | NS |
Ethnicity | |||
Hispanic | Reference | ||
Not Hispanic | 1.378 | 1.027–1.849 | 0.0325 |
Unknown | 1.454 | 0.912–2.318 | NS |
Great Circle Distance | 1.000 | 0.999–1.000 | NS |
Facility Type | |||
Community Cancer Program | Reference | ||
Academic/Research Program | 0.553 | 0.384–0.797 | 0.0015 |
Comprehensive Community Cancer Program | 0.648 | 0.458–0.918 | 0.0145 |
Integrated Network Cancer Program | 0.577 | 0.392–0.850 | 0.0053 |
Unknown | 0.379 | 0.237–0.607 | < 0.0001 |
Year of Diagnosis | 0.964 | 0.933–0.997 | 0.0308 |
Annual Hospital Volume | |||
Average < 5 cases per year | Reference | ||
Average 5–10 cases per year | 0.946 | 0.587–1.525 | NS |
Average > 10 cases/year | 0.549 | 0.195–1.551 | NS |
Tumor differentiation | |||
Well differentiated | Reference | ||
Moderately differentiated | 1.639 | 1.262–2.127 | 0.0002 |
Poorly differentiated | 1.820 | 1.451–2.283 | < 0.0001 |
Undifferentiated | 1.665 | 1.263–2.194 | 0.0003 |
Unknown | 1.812 | 1.423–2.308 | < 0.0001 |
Histology | |||
Leiomyosarcoma | Reference | ||
Liposarcoma | 0.726 | 0.615–0.857 | 0.0002 |
Other | 0.887 | 0.706–1.113 | NS |
Tumor Size | |||
≤ 10 cm | Reference | ||
> 10 cm | 0.795 | 0.684–0.923 | 0.0026 |
Tumor Grade | |||
Grade 1 | Reference | ||
Grade 2 | 0.986 | 0.719–1.353 | NS |
Grade 3 | 1.301 | 0.992–1.705 | NS |
Unknown | 0.907 | 0.688–1.196 | NS |