One-year VGF rates were much lower in the buffered saline group than in the saline group ( patient-level odds ratio [ OR ] , 0.59 [ 95 % CI , 0.45-0 .78 ; P < .001 ] ; graft-level OR , 0.63 [ 95 % CI , 0.49-0 .79 ; P < .001 ] ) or the blood group ( patient-level OR , 0.62 [ 95 % CI , 0.46-0 .83 ; P = .001 ] ; graft-level OR , 0.63 [ 95 % CI , 0.48-0 .81 ; P < .001 ] ) .