Table 1 Participant characteristics by study*

From: Associations between social drivers of health and breast cancer stage at diagnosis among U.S. Black women

 

BWHS

n = 1777

CBCS

n = 1493

WCHS/WCHFS

n = 1725

Age at diagnosis, n (%)

 ≥70

339 (19.1)

80 (5.4)

129 (7.5)

 60–69

556 (31.9)

288 (19.3)

404 (23.4)

 50–59

548 (30.8)

385 (25.8)

565 (32.8)

 40–49

296 (16.7)

536 (35.9)

446 (25.9)

 <40

28 (1.5)

204 (13.7)

181 (10.5)

Stage at diagnosis, n (%)

 I

958 (53.9)

512 (34.3)

760 (44.1)

 II

557 (31.3)

658 (44.1)

676 (39.2)

 III

187 (10.5)

250 (16.7)

239 (13.9)

 IV

75 (4.3)

73 (4.9)

50 (2.9)

ER status, n (%)

 ER+

1195 (67.2)

919 (61.6)

1176 (68.2)

 ER−

529 (29.8)

499 (33.4)

532 (30.8)

 Missing

53 (3.0)

75 (5.0)

17 (1.0)

Marital status, n (%)

 Married/living as married

823 (46.3)

619 (41.5)

619 (35.9)

 Single

325 (18.3)

295 (19.7)

587 (34.0)

 Separated/divorced/widowed

628 (35.3)

578 (38.7)

519 (30.1)

Years of education, n (%)

 ≥16 years

1080 (60.8)

535 (35.8)

511 (29.6)

 13–15 years

460 (25.9)

502 (33.7)

513 (29.7)

 ≤12 years

235 (13.2)

455 (30.4)

700 (40.6)

Household incomea, n (%)

 High

302 (17.0)

117 (7.8)

287 (16.6)

 Medium high

669 (37.6)

292 (19.6)

383 (22.2)

 Medium low

515 (29.0)

517 (34.7)

383 (22.2)

 Low

190 (10.1)

487 (32.6)

554 (32.1)

 Missing

101 (5.7)

80 (5.4)

118 (6.8)

Income for household sizeb, n (%)

 Above the federal poverty line

1558 (87.6)

1028 (68.9)

1263 (73.2)

 Below the federal poverty line

76 (4.3)

383 (25.6)

343 (19.9)

 Missing

143 (8.1)

82 (5.5)

119 (6.9)

Health insurance, n (%)

 Yes

1623 (91.3)

1369 (91.7)

1508 (87.4)

 No

124 (7.0)

123 (8.2)

217 (12.6)

Regular preventive carec, n (%)

 Yes

1488 (83.7)

1219 (81.6)

–

 No

261 (14.7)

274 (18.4)

–

Adherent to mammography screening guidelinesd, n (%)

 Yes

1473 (82.9)

1070 (71.7)

1377 (79.8)

 No

291 (16.4)

375 (25.1)

265 (15.4)

  1. BWHS Black Women’s Health Study, CBCS Carolina Breast Cancer Study, WCHS Women’s Circle of Health Study, WCHFS Women’s Circle of Health Follow-up Study, ER Estrogen receptor.
  2. *Percentages may not add to 100% due to rounding or missing data. A missing category is displayed for all variables with >5% missing.
  3. aCategory definitions varied by study. BWHS: >$100,000, $50,001–$100,000, $25,001–$50,000, and ≤$25,000; WCHS/WCHFS: ≥$90,000, $50,000–$89,999, $25,000–$49,999, and <$25,000; CBCS: >$100,000, $50,001–$100,000, $20,000–$50,000, and <$20,000
  4. bBWHS and CBCS calculations were based off of the 2010 poverty line. The WCHS/WCHFS calculation was based on the 2013 poverty line.
  5. cPreventive care was not queried in WCHS/WCHFS.
  6. dBWHS and WCHS/WCHFS defined adherent as under age 50 or age ≥50 with utilization of screening mammography. CBCS defined adherent as under age 45 or age ≥45 with utilization of screening mammography.
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