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Table 1 Demographics and clinicopathological characteristics of patients with Ewing sarcoma

From: A nomogram for predicting overall survival in patients with Ewing sarcoma: a SEER-based study

Characteristics Training set(n = 406) Percent (%) Validation set(n = 172) Percent (%)
Number of patients Number of patients
Age (years)
  ≤ 18 248 61.1 107 62.2
 19–27 89 21.9 38 22.1
  ≥ 28 69 17.0 27 15.7
Sex
 Male 250 61.6 104 60.5
 Female 156 38.4 68 39.5
Race
 White 344 84.7 155 90.1
 Black 18 4.5 6 3.5
 Others/unknown 44 10.8 11 6.4
stage
 II 212 52.1 88 51.2
 III 6 1.5 1 0.6
 IV 141 34.7 57 33.1
 Others/unknown 47 11.7 26 15.1
T stage
 T0-T1 165 40.6 59 34.3
 T2 143 35.2 67 39.0
 T3 21 5.2 8 4.6
 Tx 77 19.0 38 22.1
N stage
 N0 345 85.0 147 85.5
 N1 28 6.9 12 7.0
 Nx 33 8.1 13 7.5
M stage
 M0 274 67.5 117 68.0
 M1 132 32.5 55 32.0
Bone metastasis
 Yes 56 13.8 26 15.1
 No/unknown 350 86.2 146 84.9
Brain metastasis
 Yes 4 1.0 2 1.2
 No/unknown 402 99.0 170 98.8
Liver metastasis
 Yes 4 1.0 2 1.2
 No/unknown 402 99.0 170 98.8
Lung metastasis
 Yes 71 17.5 37 21.5
 No/unknown 335 82.5 135 78.5