Table 1.

Characteristics of cases (n = 40) and controls (n = 40) in the UNM-EBCR cytokine project.

Characteristics	Cases Mean (SD)	Controls Mean (SD)
Age at blood draw	49.2 (13.6)	50.2 (10.8)
Ethnicity	N (%)	N (%)
White	31 (77.5)	29 (72.5)
Hispanic	7 (17.5)	8 (20.0)
African-American	1 (2.5)	1 (2.5)
Native American	1 (2.5)	1 (2.5)
Refused	0 (0)	1 (2.5)
Stage at diagnosis
Stage 0 (DCIS)	2 (5)	–
Stage I	16 (40)	–
Stage II-A	11 (27.5)	–
Stage II-B	4 (10)	–
Stage III-A	6 (15)	–
Stage IV	1 (2.5)	–
Lymph node involvement
Yes	10 (25)	–
No	30 (75)	–
Cigarette smoking status
Non-smoker	38 (95.0)	36 (90.0)