RESULTS	Compared with women with serum concentrations of 25 ( OH ) D 30 ng/mL , adjusted odds ratios ( 95 % CI ) for breast cancer recurrence were 1.14 ( 0.57 , 2.31 ) for those with concentrations < 10 ng/mL , 1.00 ( 0.68-1 .48 ) for concentrations 10 and < 20 ng/mL , and 1.05 ( 0.76 , 1.47 ) for concentrations 20 and < 30 ng/mL .\