From: Machine learning model for predicting acute kidney injury progression in critically ill patients
Variables | Overall | Non-progression (n = 23,581) | Progression (n = 2130) | P value |
---|---|---|---|---|
Gender, n (%) | Â | Â | Â | 0.005 |
 Male | 15,018 (58.4) | 13,836 (58.7) | 1182 (55.5) |  |
 Female | 10,693 (41.6) | 9745 (41.3) | 948 (44.5) | 0.005 |
Age, median [Q1,Q3] | 66.0 [55.0,77.0] | 66.0 [55.0,77.0] | 65.5 [53.0,76.0] | 0.001 |
Ethnicity, n (%) | Â | Â | Â | <Â 0.001 |
 Asian | 503 (2.0) | 470 (2.0) | 33 (1.5) |  |
 Black | 2042 (7.9) | 1805 (7.7) | 237 (11.1) |  |
 Hispanic | 718 (2.8) | 649 (2.8) | 69 (3.2) |  |
 Native | 12 (0.0) | 10 (0.0) | 2 (0.1) |  |
 Other | 656 (2.6) | 602 (2.6) | 54 (2.5) |  |
 Unknown | 3106 (12.1) | 2835 (12.0) | 271 (12.7) |  |
 White | 18,674 (72.6) | 17,210 (73.0) | 1464 (68.7) |  |
Admissions_type, n (%) | Â | Â | Â | Â |
 ELECTIVE | 4511 (17.5) | 4342 (18.4) | 169 (7.9) | < 0.001 |
 EMERGENCY | 20,450 (79.5) | 18,559 (78.7) | 1891 (88.8) |  |
 URGENT | 750 (2.9) | 680 (2.9) | 70 (3.3) |  |
ICU_type, n (%) | Â | Â | Â | <Â 0.001 |
 CCU | 3647 (14.2) | 3288 (13.9) | 359 (16.9) |  |
 CSRU | 6500 (25.3) | 6253 (26.5) | 247 (11.6) |  |
 MICU | 8679 (33.8) | 7681 (32.6) | 998 (46.9) |  |
 SICU | 3937 (15.3) | 3561 (15.1) | 376 (17.7) |  |
 TSICU | 2948 (11.5) | 2798 (11.9) | 150 (7.0) |  |
Cardiac surgery, n (%) | 20,596 (80.1) | 19,043 (80.8) | 1553 (72.9) | <Â 0.001 |
Respiratory failure, n (%) | 9381 (36.5) | 8025 (34.0) | 1356 (63.7) | <Â 0.001 |
Mechanical ventilation, n (%) | 7380 (28.7) | 6650 (28.2) | 730 (34.3) | <Â 0.001 |
MODS, n (%) | 15,961 (62.1) | 13,958 (59.2) | 2003 (94.0) | <Â 0.001 |
Spesis, n (%) | 4358 (16.9) | 3476 (14.7) | 882 (41.4) | <Â 0.001 |
Vasoactive_drugs, n (%) | 8098 (31.5) | 7425 (31.5) | 673 (31.6) | 0.937 |
Vital signs, mean (SD) | Â | Â | Â | Â |
 Blood pressure (mmHg) | 76.6 (16.4) | 76.7 (16.0) | 76.3 (20.3) | 0.527 |
 Heart rate | 86.4 (18.2) | 86.1 (17.9) | 90.2 (21.2) | < 0.001 |
 Respiratory rate | 19.2 (6.0) | 19.1 (5.9) | 20.3 (6.9) | < 0.001 |
 Temperature (\(^\circ \mathrm{C}\)) | 36.9 (0.6) | 36.9 (0.6) | 36.8 (0.7) | < 0.001 |
Laboratory variables, mean (SD) | Â | Â | Â | Â |
 Anion gap (mEq/l) | 13.5 (3.6) | 13.3 (3.5) | 15.4 (4.5) | < 0.001 |
 PaO2 (mmHg) | 128.0 (77.8) | 128.5 (77.7) | 123.5 (79.7) | 0.016 |
 pH | 7.4 (0.1) | 7.4 (0.1) | 7.4 (0.1) | < 0.001 |
 Glucose (mg/dl) | 137.0 (72.2) | 136.3 (68.4) | 144.9 (105.2) | < 0.001 |
 Lactate (mmol/l) | 2.1 (1.7) | 2.1 (1.6) | 2.5 (2.3) | < 0.001 |
 Sodium (mmol/l) | 138.4 (4.7) | 138.5 (4.6) | 137.6 (5.6) | < 0.001 |
 Potassium (mmol/l) | 4.2 (0.6) | 4.2 (0.6) | 4.3 (0.8) | < 0.001 |
 BUN (mg/dl) | 24.8 (18.5) | 23.5 (17.0) | 39.0 (26.2) | < 0.001 |
 Creatinine (mg/dl) | 1.2 (1.1) | 1.1 (0.9) | 2.4 (2.0) | < 0.001 |
 FST (ml/h) | 107.8 (112.9) | 108.8 (113.1) | 93.6 (108.6) | < 0.001 |