Table 2 Clinicopathological characteristics of ovarian cancer with and without lymph node metastasis

Total

8010 (71.0)

1495(13.3)

NA

NA

1285(11.4)

NA

NA

485 (4.3)

NA

Age (year)

 < 50

2398 (75.6)

356 (11.2)

1

283 (8.9)

1

137 (4.3)

1

 ≥ 50

5612 (69.3)

1139(14.0)

0.93(0.77–1.12)

0.447

1002(12.4)

0.89(0.77–1.04)

0.149

348 (4.3)

0.68(0.53–0.87)

Histology

 Type I

3105 (88.2)

205 (5.8)

1

167 (4.7)

1

45 (1.3)

1

 Type II

4905 (63.3)

1290(16.6)

1.32(1.06–1.65)

0.015

1118(14.4)

1.30(1.05–1.61)

0.018

440 (5.7)

1.85(1.29–2.65)

Tumor Stage

 Stage T1

4158 (95.4)

88 (2.0)

1

101 (2.3)

1

13 (0.3)

1

 Stage T2

1401 (81.1)

143 (8.3)

4.03(2.99–5.43)

0.000

149 (8.6)

3.78(2.85–5.01)

0.000

34 (2.0)

4.68(2.32–9.43)

 Stage T3

2219 (47.6)

1134(24.3)

17.16(13.36–22.05)

0.000

916 (19.7)

11.31(8.92–14.36)

0.000

389 (8.4)

22.86(12.66–41.28)

 Stage T_XM1

194 (40.2)

127 (26.3)

23.15(16.30–32.89)

0.000

114 (23.7)

15.22(10.76–21.53)

0.000

47 (9.8)

30.39(15.08–61.23)

 Unknown

38 (79.2)

3 (6.2)

5 (10.4)

2 (4.2)

Pathology Grade

 Grade 1

1534 (90.9)

85 (5.1)

1

49 (2.9)

1

19 (1.1)

1

 Grade 2

2423 (81.0)

276 (9.2)

0.86(0.61–1.22)

0.404

212 (7.1)

1.35(0.91–1.98)

0.134

80 (2.7)

0.86(0.61–1.22)

 Grade 3

4053 (61.4)

1134(17.2)

1.18(0.85–1.64)

0.316

1024 (15.5)

2.22(1.55–3.20)

0.000

386 (5.9)

1.18(0.85–1.64)

Tumor size

 ≤ 5 cm

1285 (71.6)

235 (13.1)

1

181 (10.1)

1

94 (5.2)

1

5-10 cm

1767 (69.2)

376 (14.7)

1.02(0.86–1.21)

0.820

284 (11.1)

0.99(0.83–1.18)

0.881

126 (5.0)

0.88(0.67–1.17)

 10-15 cm

1643 (74.7)

229 (10.4)

0.85(0.71–1.02)

0.081

242 (11.0)

1.16(0.96–1.40)

0.132

86 (3.9)

0.86(0.63–1.17)

 15-20 cm

814 (78.7)

98 (9.5)

0.82(0.64–1.05)

0.110

99 (9.6)

1.06(0.83–1.36)

0.642

23 (2.2)

0.58(0.36–0.93)

 > 20 cm

520 (82.8)

36 (5.7)

0.61(0.43–0.86)

0.005

61 (9.7)

1.36(1.00–1.85)

0.049

11 (1.8)

0.59(0.31–1.13)

 Unknown

1981 (64.6)

521 (17.0)

418 (13.7)

145 (4.7)