Table 2.
Characteristics of women diagnosed with epithelial ovarian cancer, according to tumour stage at diagnosis.
| All (n = 10,601) |
Localized stage (n = 2,270) |
Advanced stageb (n = 8,331) |
P-value | |
|---|---|---|---|---|
| Age at diagnosis (years) | ||||
| Median | 57.0 | 53.0 | 58.0 | <0.001c |
| Interquartile range | 49.0–65.0 | 45.7–62.0 | 50.0–66.0 | |
| Histology | ||||
| Serous | 6,066 (57.2) | 501 (22.1) | 5,565 (66.8) | <0.001d |
| Serous low-grade | 479 (4.5) | 98 (4.3) | 381 (4.6) | |
| Serous high-grade | 5,030 (47.4) | 339 (14.9) | 4,691 (56.3) | |
| Endometrioid | 1,664 (15.7) | 665 (29.3) | 999 (12.0) | |
| Mucinous | 780 (7.4) | 480 (21.1) | 300 (3.6) | |
| Clear cell | 875 (8.3) | 412 (18.1) | 463 (5.6) | |
| Othera | 1,216 (11.5) | 212 (9.3) | 1,004 (12.1) | |
| Level of education | ||||
| ≤High school | 5,190 (49.0) | 1,054 (46.4) | 4,136 (49.6) | 0.008d |
| >High school | 5,411 (51.0) | 1,216 (53.6) | 4,195 (50.4) | |
| BMI | ||||
| Median | 24.0 | 23.6 | 24.1 | <0.001c |
| Interquartile range | 21.4–28.2 | 20.9–28.0 | 21.5–28.2 | |
| Smoking status | 0.02d | |||
| Never | 5,770 (54.4) | 1,227 (54.1) | 4,543 (54.5) | |
| Former | 3,391 (32.0) | 694 (30.6) | 2,697 (32.4) | |
| Current | 1,440 (13.6) | 349 (15.4) | 1,091 (13.1) | |
| Race/ethnicity | <0.001d | |||
| Non-Hispanic White | 9,129 (86.1) | 1,878 (82.7) | 7,251 (87.0) | |
| Hispanic White | 306 (2.9) | 62 (2.7) | 244 (2.9) | |
| Black | 265 (2.5) | 53 (2.3) | 212 (2.5) | |
| Asian | 565 (5.3) | 190 (8.4) | 375 (4.5) | |
| Other | 331 (3.1) | 87 (3.8) | 244 (2.9) |
a
Includes mixed cell, undifferentiated and tumours of unknown histology
b
Includes regional or distant stage
c
The P-value was calculated using the Wilcoxon rank sum statistical test as the data were not normally distributed
d
The P-value was calculated using the Pearson’s chi square statistical test at the data were normally distributed
Numbers may not sum up to total because of missing data