One-year changes in hip DXA , NTX , and BAP were not related to subsequent fracture risk , but older age and lower hip DXA at time of discontinuation were significantly related to increased fracture risk ( lowest tertile of baseline femoral neck DXA vs other 2 tertiles relative hazard ratio , 2.17 [ 95 % CI , 1.38-3 .41 ] ; total hip DXA relative hazard ratio , 1.87 [ 95 % CI , 1.20-2 .92 ] ) .