TABLE 1—

Characteristics of Total Study Sample and by Breast Cancer Stage at Diagnosis

	Total n = 1700 n	Total % Percentage (weighted)	Stage 0, I n = 1176 % (weighted)	Stage II, III n = 524 % (weighted)	P
Study site					.52
Los Angeles	870	51.4	52.0	50.4
Detroit	830	48.6	48.0	49.6
Age, y
< 50	355	19.1	16.4	23.0
50–64	719	42.6	41.9	43.6
≥ 65	626	38.3	41.7	33.4
Race/ethnicity					<.001
Hispanic	184	11.9	8.9	16.4
Non-Hispanic Black	383	18.1	16.1	21.2
Non-Hispanic White	1133	70.0	75.0	62.4
Education					.08
Less than high school	196	12.9	11.4	15.2
High-school diploma	361	23.4	23.3	23.6
Some college or more	1013	63.7	65.3	61.2
Annual household income, $					.15
< 20 000	320	18.6	17.9	19.6
20 000–49 999	457	27.0	27.8	25.9
≥ 50 000	635	37.6	38.9	35.6
Income missing	288	16.8	15.4	18.9
How cancer was detected					<.001
Self/partner	408	31.4	14.9	56.1
Clinical breast examination	89	6.3	4.1	9.6
Screening mammogram	1093	62.3	81.0	34.3
Mean age, y ±SD		60.0 years ±11.1		58.3 years ±12.8	<.001