Table 2 Meta-analyzed odds ratios comparing odds of breast cancer diagnosis at stage II, or III/IV versus stage I by social drivers of health

	Stage I			Stage II				Stage III/IV
	BWHS N	CBCS N	WCHS/ WCHFS N	BWHS N	CBCS N	WCHS/ WCHFS N	Meta-analyzed OR^a (95% CI)	BWHS N	CBCS N	WCHS/WCHFS N	Meta-analyzed OR^a (95% CI)
Marital status
Married/living as married	445	224	284	259	278	243	Reference	119	117	92	Reference
Single	167	94	264	109	127	233	1.02 (0.70, 1.48)	49	74	90	1.02 (0.63, 1.65)
Separated/divorced/widowed	346	194	212	189	253	200	1.07 (0.77, 1.48)	93	131	107	1.21 (0.80, 1.85)
Years of education
≥16 years	581	167	236	348	201	193	Reference	151	87	82	Reference
13–15 years	249	159	222	145	231	207	1.10 (0.78, 1.55)	66	112	84	1.14 (0.73, 1.78)
≤12 years	126	186	302	64	226	275	1.05 (0.71, 1.55)	45	123	123	1.21 (0.74, 1.97)
Household income^b
High	164	42	149	101	61	104	Reference	37	14	34	Reference
Medium high	364	118	185	211	124	142	1.00 (0.64, 1.56)	94	50	56	1.29 (0.68, 2.45)
Medium low	282	186	159	152	223	153	1.09 (0.69, 1.72)	81	108	71	1.66 (0.88, 3.12)
Low	92	145	223	64	211	221	1.37 (0.82, 2.29)	34	131	110	2.17 (1.08, 4.37)
Income for household size^c
Above the federal poverty line	846	387	591	488	598	477	Reference	224	193	195	Reference
Below the federal poverty line	32	104	125	28	60	143	1.42 (0.94, 2.14)	16	110	75	1.91 (1.17, 3.10)
Health insurance
Yes	881	476	686	507	598	587	Reference	235	294	235	Reference
No	64	35	74	36	60	89	1.14 (0.69, 1.88)	24	28	54	1.45 (0.80, 2.62)
Utilized routine screening mammography^d
Yes	647	289	408	291	249	260	Reference	133	91	82	Reference
No	60	95	82	43	168	123	1.94 (1.25, 3.00)	39	112	60	3.21 (1.90, 5.43)
Below age for universal screening	250	106	235	222	221	260	1.52 (1.03, 2.25)	88	114	132	1.62 (0.97, 2.71)

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, OR odds ratio, CI Confidence Interval.
^aORs were adjusted for age at diagnosis (continuous), income for household size, and insurance status across all three studies
^bCategory 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
^c BWHS and CBCS calculations were based off of the 2010 poverty line. The WCHS/WCHFS calculation was based on the 2013 poverty line.
^d BWHS and WCHS/WCHFS defined age 50 as the age for universal screening, while CBCS used age 45 as the universal screening cutoff.

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