Lower endothelial cell density ( ECD ) and higher corneal thickness ( CT ) at 6 months ( 6 % vs 41 % for ECD 2700 vs < 1700 cells/mm2 [ P < .001 ] ; 14 % vs 36 % for CT < 500 vs 600 m [ P = .001 ] ) , 1 year ( 4 % vs 39 % for ECD 2700 vs < 1700 cells/mm2 [ P < .001 ] ; 18 % vs 28 % for CT < 500 vs 600 m [ P = .04 ] ) , and 5 years ( 2 % vs 29 % for ECD 1500 vs < 500 cells/mm2 [ P < .001 ] ; 7 % vs 34 % for CT < 550 vs 650 m [ P < .001 ] ) were associated with subsequent graft failure .