One-year VGF rates were much lower in the buffered saline group than in the saline group ( patient-level odds ratio -LSB- OR -RSB- , @ -LSB- @ % CI , @-@ @ ; P < @ -RSB- ; graft-level OR , @ -LSB- @ % CI , @-@ @ ; P < @ -RSB- ) or the blood group ( patient-level OR , @ -LSB- @ % CI , @-@ @ ; P = @ -RSB- ; graft-level OR , @ -LSB- @ % CI , @-@ @ ; P < @ -RSB- ) .