Table 1: Sociodemographic characteristics of Black women age 40-75 years in the Women’s Circle of Health Study (WCHS), overall and by initial mode of breast cancer detection.

OverallScreening mammogramClinical breast examSelf-detectionP-value
(N = 1322)(n = 725)(n = 63)(n = 534)
N ()n ()n ()n ()

Age at diagnosis (years), mean±SD54.19±10.757.35±9.251.44±11.150.17±11.1<0.001
Age at diagnosis (years)<0.001
 40-49325 (24.6)147 (20.3)17 (27.0)161 (30.2)
 50-59431 (32.6)248 (34.2)17 (27.0)166 (31.1)
 60-75449 (34.0)318 (43.9)17 (27.0)114 (21.4)
Marital 0.494
 Married or living as married576 (43.6)326 (45.0)25 (39.7)225 (42.1)
 Unmarried746 (56.4)399 (55.0)38 (60.3)309 (57.9)
Education0.390
 High school/vocational/technical graduate or below538 (40.7)311 (42.9)25 (39.7)202 (37.8)
 Some post-secondary education327 (24.7)167 (23.0)13 (20.6)147 (27.5)
 College graduate or above456 (34.5)246 (33.9)25 (39.7)185 (34.6)
Annual household 0.224
 <$70,000765 (57.9)400 (55.2)37 (58.7)328 (61.4)
 ≥$70,000480 (36.3)282 (38.9)21 (33.3)177 (33.2)
Primary health insurance at <0.001
 Private775 (58.6)413 (57.0)39 (61.9)323 (60.5)
 Medicaid130 (9.8)65 (9.0)8 (12.7)57 (10.7)
 Medicare193 (14.6)140 (19.3)10 (15.9)43 (8.1)
 Uninsured131 (9.9)51 (7.0)5 (7.9)75 (14.0)
 Other81 (6.1)50 (6.9)1 (1.6)30 (5.6)
 Missing12 (0.9)6 (0.8)0 (0.0)6 (1.1)

The unmarried category is composed of those who reported being single/never married, separated, divorced, or widowed.
$70,000 is the median income among households in New Jersey and was used as the cut-point to dichotomize the income variable.
The “other” insurance category includes forms of insurance reported by WCHS participants that did not fall into one of the four main categories above and included the following types of insurance coverage: school-provided, national government-provided [foreign country], spousal insurance, health center care, charity care, health savings account, and Veterans Affairs coverage.