Table 3.

Frequency distribution of patient and tumor characteristics among invasive epithelial ovarian cancers and a subset of advanced-stage HGS ovarian cancer cases

Invasive ovarian cancer cases N = 193Advanced-stage HGS ovarian cancer cases N = 106
Variablen (%)n (%)
Age, y
 0–4938 (19.7)15 (14.2)
 50–5967 (34.7)40 (37.7)
 60–6962 (32.1)38 (35.8)
 ≥7026 (13.5)13 (12.3)
Self-reported race
 Caucasian156 (81.8)91 (85.8)
 African American29 (15.0)13 (12.3)
 Other8 (4.2)2 (1.9)
Smoking status
 Never smoked102 (52.85)58 (54.72)
 Current smoker29 (15.03)16 (15.09)
 Ex-smoker62 (32.12)32 (30.19)
Diagnosed infertility
 Yes22 (11.4)12 (11.3)
 No171 (88.6)94 (88.7)
Age at last pregnancy
 Never28 (14.5)13 (12.3)
 <2439 (20.2)22 (20.7)
 25–2956 (29.0)31 (29.3)
 30–3441 (21.2)19 (17.9)
 ≥3529 (15.0)21 (19.8)
Number of live births, y
 None35 (18.1)18 (17.0)
 1–295 (49.2)53 (50.0)
 3–455 (28.5)31 (29.2)
 ≥58 (4.2)4 (3.8)
Age at menarche
 <1245 (23.4)20 (18.9)
 >12147 (76.6)86 (81.1)
 Missing1
Menopausal status at diagnosis
 Premenopausal50 (26.0)25 (23.6)
 Postmenopausal142 (74.0)81 (76.4)
 Missing1
Ever diagnosed with endometriosis
 Yes18 (9.4)7 (6.6)
 No173 (90.6)99 (93.4)
 Missing2
Oral contraceptive use, y
 Never76 (40.4)38 (37.3)
 <124 (12.8)13 (12.7)
 1–<542 (22.3)25 (24.5)
 ≥546 (24.5)26 (25.5)
 Missing54
Breastfeeding (among ever pregnant)
 Never90 (57.0)52 (59.1)
 <6 mo33 (20.9)17 (19.3)
 6–12 mo14 (8.8)7 (8.0)
 >12 mo21 (13.3)12 (13.6)
Tubal ligation
 Yes52 (26.9)32 (30.2)
 No141 (73.1)74 (69.8)
BMI (kg/m2) 1 y before diagnosis
 <2575 (39.9)45 (44.1)
 25–<3049 (26.1)26 (25.5)
 30–<3529 (15.4)17 (16.7)
 >3535 (18.6)14 (13.7)
 Missing54
Family history of breast and ovarian cancers
 Yes46 (23.8)24 (22.6)
 No147 (76.2)82 (77.4)
Peritoneal
 Yes19 (9.8)16 (15.1)
 No174 (90.2)90 (84.9)
Histologic subtype
 Serous126 (65.3)106 (100)
 Endometrioid25 (13.0)0 (0)
 Mucinous7 (3.6)0 (0)
 Clear cell9 (4.7)0 (0)
 Other26 (13.5)0 (0)
Tumor grade
 Well differentiated29 (15.1)0 (0)
 Moderate67 (34.9)54 (50.9)
 Poor/undifferentiated96 (50.0)52 (49.1)
 Missing10
Tumor stage
 I/II37 (19.2)0 (0)
 III/IV156 (80.8)106 (100)