In contrast, eGFR decreased steadily in the first 3 months and then meaningly increased at 12 months (eGFR at the time of discharge, 1 month, 3 month, 6 month, 12 month respectively: 66.91 ± 14.57 ml / min/1.73 m 2; 64.08 ± 10.73 ml / min/1.73 m 2; 63.88 ± 11.25 ml / min/1.73 m 2; 66.88 ± 13.31 ml / min/1.73 m 2; 67.18 ± 12.45 ml / min/1.73m2; p <0.001).