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Table 1 Characteristics of 2995 study patients

From: Screening with magnetic resonance imaging, mammography and ultrasound in women at average and intermediate risk of breast cancer

  Number Percent
Age at study entry
 40–49 1022 34.1%
 50–59 1537 51.3%
 60+ 436 14.6%
 Mean age 52.5  
Family history
 Positive 458 15.3%
 Negative 2537 84.7%
Chek2 mutation
 Truncating 48 1.6%
 Missense 308 10.4%
 Either 356 12.0%
 Neither 2616 88.0%
 Missing 23