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Table 1 Demographic characteristics of study population

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

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