Table 2.

Cancer stage at diagnosis and race/ethnicity by breast cancer subtypes

Non-Hispanic whiteAfrican AmericanHispanic whiteAsian/Pacific IslanderAmerican Indian/Alaska Native
n = 72,623n = 10,874n = 9,944n = 8,068n = 555
n (%)n (%)OR (95% CI)n (%)OR (95% CI)n (%)OR (95% CI)n (%)OR (95% CI)
Stages, all subtypesa
 I39,179 (53.9)4,318 (39.7)1.0 (Ref)4,216 (42.4)1.0 (Ref)3,937 (48.8)1.0 (Ref)237 (42.7)1.0 (Ref)
 II22,195 (30.6)3,986 (36.7)1.3 (1.3–1.4)3,696 (37.2)1.3 (1.2–1.4)2,856 (35.4)1.2 (1.1–1.2)189 (34.1)1.2 (1.0–1.5)
 III7,796 (10.7)1,700 (15.6)1.5 (1.4–1.5)1,486 (14.9)1.3 (1.2–1.4)921 (11.4)1.0 (0.9–1.1)95 (17.1)1.5 (1.2–1.9)
 IV3,453 (4.8)870 (8.0)1.6 (1.4–1.7)546 (5.5)1.1 (1.0–1.2)354 (4.4)0.9 (0.8–1.0)34 (6.1)1.1 (0.7–1.6)
HR+/HER2b
 I32,036 (58.1)2,973 (45.0)1.0 (Ref)3,274 (47.9)1.0 (Ref)3,103 (53.6)1.0 (Ref)191 (48.2)1.0 (Ref)
 II15,838 (28.7)2,239 (33.9)1.4 (1.3–1.5)2,348 (34.4)1.3 (1.2–1.3)1,904 (32.9)1.1 (1.1–1.2)124 (31.3)1.1 (0.9–1.4)
 III5,074 (9.2)937 (14.2)1.6 (1.5–1.8)895 (13.1)1.3 (1.2–1.5)563 (9.7)1.0 (0.9–1.1)63 (15.9)1.6 (1.2–2.1)
 IV2,231 (4.0)456 (6.9)1.7 (1.5–1.9)313 (4.6)1.0 (0.9–1.2)222 (3.8)0.9 (0.8–1.1)18 (4.5)0.9 (0.5–1.5)
Triple negativeb
 I3,130 (40.4)741 (30.1)1.0 (Ref)412 (29.5)1.0 (Ref)274 (34.9)1.0 (Ref)13 (19.7)1.0 (Ref)
 II3,021 (39.0)1,089 (44.3)1.3 (1.2–1.5)678 (48.6)1.4 (1.2–1.6)349 (44.5)1.2 (1.0–1.5)29 (43.9)2.0 (1.0–3.9)
 III1,143 (14.8)432 (17.6)1.3 (1.1–1.5)230 (16.5)1.2 (1.0–1.4)112 (14.3)1.0 (0.8–1.3)14 (21.2)2.4 (1.1–5.2)
 IV451 (5.8)196 (8.0)1.4 (1.1–1.7)75 (5.4)0.9 (0.7–1.2)49 (6.3)1.2 (0.8–1.6)10 (15.2)3.9 (1.7–9.2)
HR+/HER2+b
 I2,951 (43.1)419 (35.2)1.0 (Ref)374 (32.4)1.0 (Ref)374 (38.9)1.0 (Ref)27 (40.3)1.0 (Ref)
 II2,389 (34.9)436 (36.6)1.2 (1.0–1.3)455 (39.4)1.3 (1.1–1.5)403 (41.9)1.3 (1.1–1.5)24 (35.8)0.9 (0.5–1.6)
 III1,000 (14.6)201 (16.9)1.2 (1.0–1.4)228 (19.7)1.4 (1.2–1.7)136 (14.1)1.0 (0.8–1.2)11 (16.4)0.9 (0.4–1.8)
 IV502 (7.3)134 (11.3)1.4 (1.1–1.8)98 (8.5)1.2 (0.9–1.5)49 (5.1)0.7 (0.5–1.0)5 (7.5)0.7 (0.3–2.0)
HR/HER2+b
 I1,062 (37.2)185 (29.8)1.0 (Ref)156 (27.7)1.0 (Ref)186 (35.1)1.0 (Ref)6 (23.1)1.0 (Ref)
 II947 (33.1)222 (35.7)1.2 (0.9–1.5)215 (38.1)1.3 (1.1–1.7)200 (37.7)1.2 (0.9–1.5)12 (46.2)2.0 (0.7–5.4)
 III579 (20.3)130 (20.9)1.0 (0.8–1.3)133 (23.6)1.2 (0.9–1.5)110 (20.8)1.0 (0.8–1.3)7 (26.9)1.7 (0.6–5.2)
 IV269 (9.4)84 (13.5)1.4 (1.0–1.9)60 (10.6)1.2 (0.8–1.7)34 (6.4)0.7 (0.5–1.0)1 (3.8)0.5 (0.1–4.5)
  • aORs were adjusted for age groups, breast cancer subtypes, marital status, and health insurance status.

  • bORs were adjusted for age groups, marital status, and health insurance status. ORs are in bold if P values are <0.05.