Table 1 Clinical characteristics of women stratified by age, N (%)

Marital status

< 0.001

 Married

 Not married

 Unknown

2488(49.2)

2370(46.9)

197(3.9)

1750(54.9)

1315(41.2)

125(3.9)

738(39.6)

1055(56.5)

72(3.9)

Race/ethnicity

0.133

 White

 Black

 Asian or Pacific Islander

 American Native

 Unknown

4338(85.8)

322(6.4)

348(6.9)

31(0.6)

16(0.3)

2710(85.0)

218(6.8)

229(7.2)

20(0.6)

13(0.4)

1628(87.3)

104(5.6)

119(6.4)

11(0.6)

3(0.2)

Laterality

< 0.001

 Unilateral

 Bilateral

2400 (47.5)

2655(52.5)

1443(45.2)

1747(54.8)

957(51.3)

908(48.7)

Stage

< 0.001

 I

 II

 III

 IV

 Unknown

330(6.5)

455(9.0)

2691(53.2)

1469(29.1)

110(2.2)

222(7.0)

277(8.7)

1702(53.4)

939(29.4)

50(1.6)

108(5.8)

178(9.5)

989(53)

530(28.4)

60(3.2)

Ca-125

0.324

 Negative

 Positive

 Unknown

235(4.6)

3996(79.1)

824 (16.3)

150(4.7)

2539(79.6)

501(15.7)

85(4.6)

1457(78.1)

323(17.3)

Tumor size

0.003

 ≤50 mm

 51-100 mm

 101-200 mm

 >200 mm

 Unknown

1135(22.5)

1359(26.9)

1096(21.7)

123(2.4)

1342(26.5)

746(23.4)

880(27.6)

699(21.9)

76(2.4)

789(24.7)

389(20.9)

479(25.7)

397(21.3)

47(2.5)

553(29.7)

Lymph node status

< 0.001

 Negative

 Positive

 No examined

 Unknown

1270(25.1)

1027(20.3)

2663(52.7)

95(1.9)

890(27.9)

693(21.7)

1549(48.6)

58(1.8)

380(20.4)

334(17.9)

1114(59.7)

37(2.0)

Chemotherapy

< 0.001

 Yes

 No

4309(85.2)

746(14.8)

2851(89.4)

339(10.6)

1458(78.2)

407(21.8)