Table 1.

Demographic and clinical characteristics of study participants in the Carolina Breast Cancer Study (CBCS), overall and by race

	CBCS Totala		White		African-American
	N	Weighted %	N	Weighted %	N	Weighted %
Total	1,735		859		830
Age at Diagnosis
<50	851	29.1	424	26.8	397	35.5
≥50	884	70.9	435	73.2	433	64.5
Missing	-
Income
<$30,000	560	28.7	161	22.3	384	50.7
≥$30,000	1,076	71.3	652	77.7	396	49.3
Missing	99		46		50
Educationb
< High School	146	7.6	43	5.9	96	12.4
HS Graduate	560	33.7	243	33.1	304	37.5
≥ Some College	1,028	58.6	573	61.0	429	50.1
Missing	1		-		1
AJCC Stage
1 or 2	1339	84.5	693	85.9	610	78.8
3 or 4	296	15.5	124	14.1	165	21.2
Missing	100		42		55
CT/RTc, d
CT and RT	211	14.2	88	13.2	119	18.3
CT only	741	50.8	350	49.8	374	56.7
RT only	126	12.1	70	12.4	49	8.5
No CT or RT	261	22.9	152	24.6	102	16.5
Missing	132		50		79
Hormonal Therapyd
Yes	459	34.2	269	37.0	178	24.5
No	1,143	65.8	537	63.0	576	75.5
Missing	133		53		76
Surgeryd
Biopsy Only	148	6.2	57	5.2	90	10.8
Lumpectomy	525	35.5	259	35.6	246	33.1
Mastectomy	946	58.3	495	59.2	428	56.1
Missing	116		48		66
Lymph Nodesd
≥ 1 LN Removed	739	49.5	364	45.0	357	47.8
No LNs Removed	850	50.5	435	55.0	392	52.2
Missing	146		60		81

Abbreviatons: CBCS = Carolina Breast Cancer Study; HS = High School; AJCC = American Joint Commission on Cancer; CT = Chemotherapy; RT= Radiation Therapy; LN = Lymph Nodes

^aTotal includes all races

^bThe high school graduate category includes those who went to technical school.

^cFor the CT/RT variable: N = 1,474 for total CBCS population, 710 for whites, and 723 for African-Americans

^dThose who received treatments after post-diagnosis physical activity was assessed were coded as not having received treatment