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Table 1 Socio-demographic and clinical characteristics of patients in the study

From: A nomogram for determining the disease-specific survival in Ewing sarcoma: a population study

Variable n (%) Training Cohort Validation Cohort
(n = 1850) (n = 793)
Age
 ≤ 30 years 1451 (78.4) 633 (79.8)
 >30 years 399 (21.6) 160 (20.2)
Sex
 Male 1089 (58.9) 497 (62.7)
 Female 761 (41.1) 296 (37.3)
Race
 White 1630 (88.1) 704 (88.8)
 Black 65 (3.5) 34 (4.3)
 Other 155 (8.4) 55 (6.9)
Marital status
 Married 341 (18.4) 131 (16.5)
 Single/Domestic Partner 1412 (76.3) 633 (79.8)
 DSW 97 (5.2) 29 (3.7)
SES
 Low poverty 744 (40.2) 315 (39.7)
 Medium poverty 986 (53.3) 425 (53.6)
 High poverty 120 (6.5) 53 (6.7)
YOD
 1990s 325 (17.6) 142 (17.9)
 2000s and 2010s 1525 (82.4) 651 (82.1)
EOD
 Confined 56 (3.0) 27 (3.4)
 Local Invasion 374 (20.2) 147 (18.5)
 Metastasis 179 (9.7) 88 (11.1)
 Unknown 1241 (67.1) 531 (67.0)
Site
 Extremity 420 (22.7) 186 (23.5)
 Axial Skeleton 718 (38.8) 295 (37.2)
 Other 712 (38.5) 312 (39.3)
Tumor Size
 ≤ 50 mm 302 (16.3) 138(17.4)
 > 50 mm–100 mm 529(28.6) 216 (27.2)
 > 100 mm 1019 (55.1) 439 (55.4)
Surgery
 Yes 1126 (60.9) 475 (59.9)
 NO/Unknown 724 (39.1) 318 (40.1)
Radiotherapy
 Yes 871 (47.1) 353 (44.5)
 No 979 (52.9) 440 (55.5)
Chemotherapy
 Yes 1683 (91.0) 745 (93.9)
 NO/Unknown 167 (9.0) 48 (6.1)
  1. Abbreviations: DSW Divorced, separated and widowed, YOD Year of diagnosis, EOD Extend of disease, SES Socioeconomic Status