Table 1.

Clinical characteristics of 435 patients with epithelial ovarian tumor and benign ovarian tumor

All patients (N = 435)Training cohort (N = 219)Test cohort (N = 216)P value
Age (range)52.2 (19–87)51.5 (19–84)52.9 (23–87)0.297
Histologic types
EOC
 High-grade serous (%)102 (23.4)46 (21.0)56 (25.9)0.258
 Endometrioid (%)66 (15.2)37 (16.9)29 (13.4)0.350
 Mucinous (%)31 (7.1)18 (8.2)13 (6.0)0.457
 Clear (%)98 (22.5)49 (22.4)49 (22.7)1
 Others (%)37 (8.5)18 (8.2)19 (8.8)0.8655
Benign ovarian tumor
 Benign cyst (%)58 (13.3)30 (13.7)28 (13.0)0.888
 Teratoma (%)43 (9.9)21 (9.6)22 (10.2)0.873
FIGO stage
 I (%)154 (46.1)77 (45.8)77 (46.4)1
 IA (%)44 (13.2)21 (12.5)23 (13.9)0.748
 IC (%)110 (32.9)56 (33.3)54 (32.5)0.908
 II (%)27 (8.1)14 (8.3)13 (7.8)1
 IIA (%)10 (3.0)5 (3.0)5 (3.0)1
 IIB (%)17 (5.1)9 (5.4)8 (4.8)1
 III (%)128 (38.3)64 (38.1)64 (38.6)1
 IIIA (%)19 (5.7)10 (6.0)9 (5.4)1
 IIIB (%)21 (6.3)11 (6.5)10 (6.0)1
 IIIC (%)88 (26.3)43 (25.6)45 (27.1)0.804
 IV (%)25 (7.5)13 (7.7)12 (7.2)1
 IVA (%)8 (2.4)3 (1.8)5 (3.0)0.501
 IVB (%)17 (5.1)10 (6.0)7 (4.2)0.620
Extent of tumor resection
 Complete (none) (%)231 (69.2)120 (71.4)111 (66.9)0.407
 Optimal (<1 cm) (%)37 (11.1)15 (8.9)22 (13.3)0.226
 Suboptimal (≥1 cm) (%)66 (19.8)33 (19.6)33 (19.9)1