Serum microRNA expression as an early marker for breast cancer risk in prospectively collected samples from the Sister Study cohort

Table 1 Demographic characteristics of study population

Demographic characteristic	Number of cases	Number of controls
	205	205
Age, years
40	2	2
40-50	47	47
50-60	64	64
60-70	71	71
≥70	21	21
Race
White (non-Hispanic)	179	179
Non-white	26	26

ISSN: 1465-542X