Table 1.

Tumor characteristics of invasive ovarian cancer in non-Hispanic whites, Hispanics, and African Americans: Los Angeles County Ovarian Cancer Study

Non-Hispanic whitesHispanicsAfrican Americans
N = 1,265N = 308N = 128
Age, y
 <3012 (0.9%)5 (1.6%)1 (0.8%)
 30–3414 (1.1%)11 (3.6%)2 (1.6%)
 35–3933 (2.6%)10 (3.2%)3 (2.3%)
 40–4458 (4.6%)31 (10.1%)13 (10.2%)
 45–49144 (11.4%)36 (11.7%)17 (13.3%)
 50–54194 (15.3%)60 (19.5%)25 (19.5%)
 55–59186 (14.7%)46 (14.9%)18 (14.1%)
 60–64193 (15.3%)43 (14.0%)24 (18.8%)
 65–69179 (14.2%)29 (9.4%)15 (11.7%)
 70–74160 (12.6%)23 (7.5%)8 (6.3%)
 75–7992 (7.3%)14 (4.5%)2 (1.6%)
Histology
 Serous721 (57.0%)179 (58.1%)71 (55.5%)
 Mucinous85 (6.7%)26 (8.4%)12 (9.4%)
 Endometrioid153 (12.1%)34 (11.0%)14 (10.9%)
 Clear cell75 (5.9%)14 (4.5%)4 (3.1%)
 Epithelial40 (3.2%)13 (4.2%)2 (1.6.%)
 Undifferentiated/poorly53 (4.2%)12 (3.9%)10 (7.8%)
 Other131 (10.4%)28 (9.1%)14 (10.9%)
 Not known7 (0.6%)2 (0.6%)1 (0.8%)
 P3dfa,b0.540.40
Stage
 Localized216 (17.1%)58 (18.8%)30 (23.4%)
 Regional170 (13.4%)49 (15.9%)12 (9.4%)
 Distant853 (67.4%)197 (64.0%)83 (64.8%)
 Not known26 (2.1%)4 (1.3%)3 (2.3%)
 P2dfa,c0.380.12
Differentiation
 Well119 (9.4%)29 (9.4%)9 (7.0%)
 Moderately well235 (18.6%)53 (17.2%)28 (21.9%)
 Poorly502 (39.7%)119 (38.6%)46 (35.9%)
 Undifferentiated170 (13.4%)33 (10.7%)16 (12.5%)
 Not known239 (18.9%)74 (24.0%)29 (22.7%)
 P3dfa,b0.810.63
  • aP value comparing non-Hispanic whites with each of the other two groups separately.

  • bP value based on cases of serous, mucinous, endometrioid, and clear-cell histology only.

  • cP value excluding cases with no known histology or stage of cancer at diagnosis.