Demographics of study population
| rrBSO n (%) | No rrBSO n (%) | Total n (%) | Value | df | P value | |
| Total population | 87 (52) | 80 (48) | 167 | |||
| Age at time of study (years) | 7.63 | 2 | 0.02 | |||
| <40 | 10 (11) | 14 (18) | 24 (14) | |||
| 41–49 | 28 (32) | 38 (48) | 66 (83) | |||
| 50 and older | 49 (56) | 28 (35) | 77 (46) | |||
| Mutation | 1.63 | 2 | 0.52 | |||
| BRCA1 | 44 (51) | 41 (51) | 85 (51) | |||
| BRCA2 | 39 (45) | 38 (48) | 77 (46) | |||
| BRCA unspecified* | 4 (5) | 1 (1) | 5 (3) | |||
| Parity at time of study | 6.535 | 3 | 0.088 | |||
| 0 | 11 (13) | 12 (15) | 23 (17) | |||
| 1–2 | 38 (44) | 27 (34) | 65 (39) | |||
| 3 or more | 26 (30) | 18 (23) | 44 (26) | |||
| Not documented | 12 (14) | 23 (29) | 35 (21) | |||
| Race/ethnicity | 0.81 | 3 | 0.85 | |||
| Caucasian | 29 (33) | 30 (38) | 59 (35) | |||
| Black | 34 (39) | 31 (39) | 65 (39) | |||
| Hispanic | 17 (20) | 15 (19) | 32 (19) | |||
| None of the above | 7 (8) | 4 (5) | 11 (7) | |||
| Ashkenazi Jewish heritage | 0.02 | |||||
| Yes | 1 (1) | 7 (9) | 8 (5) | |||
| No | 86 (99) | 73 (91) | 159 (95) | |||
| Preferred language | 0.22 | |||||
| English | 75 (86) | 74 (93) | 149 (89) | |||
| Other | 12 (14) | 6 (8) | 18 (11) | |||
| Insurance type | 0.72 | 2 | 0.698 | |||
| Private insurance | 47 (54) | 48 (60) | 95 (57) | |||
| Medicaid/Medicare | 36 (41) | 28 (35) | 64 (38) | |||
| Uninsured | 4 (5) | 4 (5) | 8 (5) | |||
| Educational attainment | 4.74 | 3 | 0.19 | |||
| Below high school | 6 (7) | 2 (3) | 8 (5) | |||
| High school/GED | 12 (14) | 5 (6) | 17 (10) | |||
| At least some higher education | 18 (21) | 20 (25) | 38 (23) | |||
| Undocumented | 51 (59) | 53 (66) | 104 (62) | |||
| Mean % of zip code using food stamps or SNAP benefits (SD) | 19% (±12%) | 21% (±13%) | 20% (±12%) | 0.97 | 165 | 0.34 |
| Mean % of zip code unemployed (SD) | 9% (±5%) | 11% (±6%) | 10% (±6%) | 1.91 | 165 | 0.060 |
| Mean % of zip code living below 150% of poverty line (SD) | 27% (±13%) | 29% (±14%) | 28% (±13%) | 1.08 | 165 | 0.281 |
| Mean violent crime rate of zip code per 100 000 population (SD) | 770 (±801) | 881 (±801) | 823 (±800) | 0.90 | 165 | 0.37 |
| PMH of breast cancer | 61, 70% | 46, 58% | 107, 64% | 2.88 | 1 | 0.09 |
| FH of ovarian or peritoneal cancer | 20, 23% | 23, 29% | 43, 26% | 0.72 | 1 | 0.40 |
| FH of other BRCA-related cancers | 72, 83% | 69, 86% | 141, 84% | 0.39 | 1 | 0.53 |
Χ2, Fisher’s exact test and two-sided t-test were used where appropriate.
*A small subset of patient’s charts referenced a BRCA mutation but did not specify BRCA1 versus BRCA2.
FH, family history; GED, General Educational Development test; PMH, past medical history; rrBSO, risk-reducing bilateral salpingo-oophorectomy; SNAP, Supplemental Nutrition Assistance Program.