Predictors of Disease-Free and Overall Survival in Retroperitoneal Sarcomas: A Modern 16-Year Multi-Institutional Study from the United States Sarcoma Collaboration (USSC)

Table 1

Demographic and tumoral data for all patients included in the study.

Demographic/tumor characteristic	N (%)
Age >65
Yes	196 (34)
No	375 (66)
Sex
Male	255 (45)
Female	316 (55)
Race
White	411 (72)
African American	69 (12)
Others/unknown	91 (16)
BMI
≥30	141 (25)
<30	430 (75)
Smoking status
Yes	496 (87)
No	75 (13)
Prior radiation exposure
Yes	35 (6)
No	536 (94)
Known genetic syndrome
Yes	556 (97)
No	15 (3)
Histology
Leiomyosarcoma	162 (28)
Liposarcoma	196 (34)
Sarcoma NOS	26 (5)
Other sarcomas	187 (33)
Grade
Low grade	131 (23)
High grade	326 (57)
Nodal disease
N0	549 (96)
N1	22 (4)
Multifocal disease
Yes	17 (3)
No	554 (97)
Size of tumor
<10 cm	201 (35)
10–20 cm	217 (38)
>20 cm	145 (25)
Organs resected
0	140 (25)
1-2	315 (55)
3-4	82 (14)
≥5	34 (6)
Therapies
No therapy	396 (70)
Radiation therapy	45 (8)
Chemotherapy	19 (3)
Radiation and chemotherapy	111 (19)
Margin status
R0	328 (57)
R1	184 (32)
R2	45 (8)