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Table 1 Patients’ demographics and clinicopathological characteristics

From: Development and validation of Nomograms for predicting overall survival and Cancer-specific survival in patients with ovarian clear cell carcinoma

Variables All patients n (%) Training set n (%) Validation set n (%) P
Total 1541 (100.0) 1079 (70.0) 462 (30.0)  
Age, years     0.984
 < 50 413 (26.8) 290 (26.9) 124 (26.8)  
 50–60 609 (39.5) 425 (39.4) 184 (39.8)  
 > 60 518 (33.6) 364 (33.7) 154 (33.3)  
Tumor size, cm     0.325
 ≤ 12 810 (52.6) 576 (53.4) 234 (50.6)  
 > 12 731 (47.4) 503 (46.6) 228 (49.4)  
Race     0.524
 White 1154 (74.9) 813 (75.3) 341 (73.8)  
 Other 387 (25.1) 266 (24.7) 121 (26.2)  
Laterality     0.289
 Unilateral 1374 (89.2) 968 (89.7) 406 (87.9)  
 Bilateral 167 (10.8) 111 (10.3) 56 (12.1)  
AJCC Stage (7th)     0.730
 I 979 (67.5) 687 (63.7) 292 (63.2)  
 II 167 (10.8) 111 (10.3) 56 (12.1)  
 III 302 (19.6) 214 (19.8) 88 (19.0)  
 IV 395 (6.0) 67 (6.2) 26 (5.6)  
Grade     0.167
 I/II 121 (7.9) 87 (8.1) 34 (7.4)  
 III 588 (38.2) 429 (39.8) 159 (34.4)  
 IV 398 (25.8) 266 (24.7) 132 (28.6)  
 Unknown 434 (28.2) 297 (27.5) 137 (29.7)  
LN dissected, n     0.154
 No 318 (20.6) 217 (20.1) 101 (21.9)  
 1–10 446 (28.9) 328 (30.4) 118 (25.5)  
 > 10 777 (50.4) 534 (49.5) 243 (52.6)  
LN     0.233
 No dissection or Negative 1370 (88.9) 966 (89.5) 404 (87.4)  
 Positive 171 (11.1) 113 (10.5) 58 (12.6)  
Organ Metastasis     0.939
 No 1505 (97.7) 1054 (97.7) 451 (97.6)  
 Yes 36 (2.3) 25 (2.3) 11 (2.4)  
Radiotherapy     0.312
 No/Unknown 1509 (97.9) 1054 (97.7) 451 (98.5)  
 Yes 32 (2.1) 25 (2.3) 7 (1.5)  
Chemotherapy     0.800
 No/Unknown 276 (17.9) 195 (18.1) 81 (17.5)  
 Yes 1265 (82.1) 884 (81.9) 381 (82.5)  
  1. AJCC American Joint Committee on Cancer, LN lymph node