Table 2 Baseline characteristics of the study population according to the recovery of acute kidney injury
Variable | All patients with AKI (n = 175) | AKI non-recovery group (n = 106) | AKI recovery group (n = 69) | P value |
|---|---|---|---|---|
Characteristics of AKI | ||||
 AKI stage (initial) |  |  |  | < 0.001 |
  Stage 1 | 120/175 (69) | 57/106 (54) | 63/69 (91) |  |
  Stage 2 | 25/175 (14) | 20/106 (19) | 5/69 (7) |  |
  Stage 3 | 30/175 (17) | 29/106 (27) | 1/69 (2) |  |
 AKI stage (highest) |  |  |  | < 0.001 |
  Stage 1 | 68/175 (39) | 16/106 (15) | 52/69 (75) |  |
  Stage 2 | 30/175 (17) | 20/106 (19) | 10/69 (15) |  |
  Stage 3 | 77/175 (44) | 70/106 (66) | 7/69 (10) |  |
Duration of AKI ≥ 4 days | 88/175 (50) | 66/106 (62) | 22/69 (32) | < 0.001 |
 RRT frequency | 45/175 (26) | 41/106 (39) | 4/69 (6) | < 0.001 |
 RRT duration ≥ 4 days | 23/45 (51) | 22/41 (54) | 1/4 (25) | 0.346 |
 †RRT requirements at discharge | 4/8 (50) | 4/6 (67) | 0/2 (0) | 0.429 |
Demographics | ||||
 Male sex | 117/175 (67) | 70/106 (66) | 47/69 (68) | 0.775 |
 Age ≥ 60 years | 99/175 (57) | 68/106 (64) | 31/69 (45) | 0.012 |
 Weight ≥ 60 kg | 115/174 (66) | 71/105 (68) | 44/69 (64) | 0.600 |
Medical history | ||||
 Heart failure | 7/172 (4) | 6/104 (6) | 1/68 (2) | 0.247 |
 Hypertension | 84/173 (49) | 56/105 (53) | 28/68 (41) | 0.118 |
 Diabetes mellitus | 50/173 (29) | 37/105 (35) | 13/68 (19) | 0.022 |
 Chronic kidney disease | 10/172 (6) | 9/104 (9) | 1/68 (2) | 0.091 |
Resuscitation | ||||
 Arrest cause |  |  |  | 0.520 |
  Medical or uncertain | 141/175 (81) | 88/106 (83) | 53/69 (77) |  |
  Trauma | 4/175 (2) | 2/106 (2) | 2/69 (3) |  |
  Poisoning | 2/175 (1) | 0/106 (0) | 2/69 (3) |  |
  Drowning | 0/175 (0) | 0/106 (0) | 0/69 (0) |  |
  Asphyxia | 28/175 (16) | 16/106 (15) | 12/69 (17) |  |
 Arrest location |  |  |  | 0.680 |
  Home | 87/175 (50) | 57/106 (54) | 30/69 (44) |  |
  Workplace | 7/175 (4) | 1/106 (1) | 6/69 (9) |  |
  Sport | 1/175 (1) | 0/106 (0) | 1/69 (1) |  |
  Street | 46/175 (26) | 27/106 (26) | 19/69 (28) |  |
  Public building | 32/175 (18) | 19/106 (18) | 13/69 (19) |  |
  Nursing home | 2/175 (1) | 2/106 (2) | 0/69 (0) |  |
Witnessed arrest | 127/175 (73) | 76/106 (72) | 51/69 (74) | 0.748 |
Bystander CPR | 103/175 (59) | 61/106 (58) | 42/69 (61) | 0.662 |
CPR time ≥ 20 min | 101/156 (65) | 71/96 (74) | 30/60 (50) | 0.002 |
Shockable rhythm | 37/169 (22) | 19/101 (19) | 18/68 (27) | 0.238 |
Adrenaline dose ≥ 4 mg | 50/154 (33) | 40/96 (42) | 10/58 (17) | 0.002 |
Post-resuscitation | ||||
 Shock | 142/175 (81) | 96/106 (91) | 46/69 (67) | < 0.001 |
 Coronary angiography | 30/175 (17) | 13/106 (12) | 17/69 (25) | 0.034 |
 Target temperature = 33 °C | 128/175 (73) | 76/106 (72) | 52/69 (75) | 0.593 |
 TTM duration = 24 h | 140/175 (80) | 83/106 (78) | 57/69 (83) | 0.486 |
Outcomes | ||||
 Survival discharge | 62/175 (35) | 17/106 (16) | 45/69 (65) | < 0.001 |
 MRS score 0 to 3 at discharge | 25/175 (14) | 3/106 (3) | 22/69 (32) | < 0.001 |