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Table 2 AKI incidence and 3-year outcomes of patients with different degree of hidden renal dysfunction

From: Preoperative hidden renal dysfunction add an age dependent risk of progressive chronic kidney disease after cardiac surgery

  eGFR ≥  90
(no renal dysfunction)
60 ≤ eGFR < 90
(hidden renal dysfunction)
eGFR < 60
(known renal dysfunction)
All (n = 1744) N 829 (47.53%) 857 (49.14%) 58 (3.33%)
AKI incidence 271 (32.69%) 301 (35.12%) 26 (44.83%)
In-hospital mortality 19 (2.29%) 40 (4.67%) a 3 (5.17%)
3-year mortality 61 (7.36%) 103 (12.02%) ab 18 (31.03%)
Progressive CKD incidence 22 (2.65%) 52 (6.07%) ab 9 (15.52%)
< 65 years (n = 1356) N 728 (53.69%) 597 (44.03%) 31 (2.29%)
AKI incidence 223 (30.63%) 187 (31.32%) 13 (41.94%)
In-hospital mortality 15 (2.06%) 28 (4.69%) a 1 (3.23%)
3-year mortality 36 (4.95%) 37 (6.20%)b 5 (16.13%)
Progressive CKD incidence 18 (2.47%) 32 (5.36%) a 4 (12.90%)
≥ 65 years (n = 388) N 101 (26.03%) 260 (67.01%) 27 (6.96%)
AKI incidence 48 (47.52%) 114 (43.85%) 13 (48.15%)
In-hospital mortality 4 (3.96%) 12 (4.62%) 2 (7.41%)
3-year mortality 25 (24.75%) 66 (25.38%)b 13 (48.15%)
Progressive CKD incidence 4 (3.96%) 20 (7.69%) 5 (18.52%)
  1. Abbreviations: eGFR estimated glomerular filtration rate, AKI acute kidney injury, CKD chronic kidney disease
  2. aCompared with group eGFR ≥90, P <  0.05; bCompared with group eGFR < 60, P <  0.05