Demographic characteristics and history of gynaecological surgeries for FDR, SDR and TDR of ovarian cancer cases and matched controls
| FDR of case (n=11 197) n (%) | FDR of control (n=117 591)n (%) | SDR of case (n=32 524) n (%) | SDR of control (n=347 069) n (%) | TDR of case (n=86 059) n (%) | TDR of control (n=895 049) n (%) | |
| Follow-up duration (years)*† | 36.7±14.3 | 37.1±14.3 | 33.2±15.2 | 33.1±15.3 | 30.9±15.6 | 30.6±15.7 |
| Birth year† | 1937.1±25.6 | 1938.8±26.5 | 1949.8±33.8 | 1952.0±33.8 | 1954.8±36.2 | 1956.2±36.4 |
| Born in Utah† | 9602 (85.8) | 102 925 (87.5) | 29 843 (91.8) | 320 953 (92.5) | 80 084 (93.1) | 837 138 (93.5) |
| White | 10 817 (96.6) | 113 776 (96.8) | 30 929 (95.1) | 330 145 (95.1) | 80 896 (94.0) | 839 935 (93.8) |
| Non-Hispanic | 8798 (78.6) | 91 913 (78.2) | 24 025 (73.9) | 255 725 (73.7) | 62 626 (72.8) | 651 446 (72.8) |
| Nulliparous* | 781 (7.0) | 8039 (6.8) | 1987 (6.1) | 20 758 (6.0) | 1046 (1.2) | 10 328 (1.2) |
| Ever tubal ligation* | 229 (2.0) | 2354 (2.0) | 1098 (3.4) | 10 704 (3.1) | 2368 (2.8) | 23 659 (2.6) |
| Ever hysterectomy* | 1022 (9.1) | 9144 (7.8) | 2440 (7.5) | 25 348 (7.3) | 4949 (5.8) | 50 288 (5.6) |
| Ever bilateral oophorectomy* | 843 (7.5) | 5614 (4.8) | 1385 (4.3) | 13 035 (3.8) | 2696 (3.1) | 26 481 (3.0) |
| Ever bilateral salpingectomy* | 835 (7.5) | 5722 (4.9) | 1431 (4.4) | 13 668 (3.9) | 2807 (3.3) | 27 706 (3.1) |
| Ever diagnosed with ovarian cancer* | 120 (1.1) | 735 (0.6) | 206 (0.6) | 1387 (0.4) | 476 (0.6) | 3576 (0.4) |
*From start of follow-up to the end of 2016.
†Matching factor for case probands and controls.
FDR, first-degree relative; SDR, second-degree relative; TDR, third-degree relative.