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Table 1 Distribution of various variables in AKI and non-AKI encounters. For numeric variables, mean and standard deviation are shown; categorical variables are shown with the number of occurrences and percentages

From: Prediction and detection models for acute kidney injury in hospitalized older adults

Variable AKI (2258) Non-AKI (23263) P-value
Demographics    
 Age 75.2 ± 9.5 75.3 ± 9.6 0.799
 BMI 29.7 ± 8.2 28.4 ± 7.3 <0.0001
 Race = White 1974 (87.4 %) 20940 (90.0 %) <0.0001
 Race = Black 198 (8.8 %) 1571 (6.8 %) <0.0004
 Race = Other 27 (1.2 %) 240 (1.0 %) 0.5331
 Sex = Female 1101 (48.8 %) 12426 (53.4 %) <0.0001
 Sex = Male 1154 (51.1 %) 10791 (46.4 %) <0.0001
 Tobacco Use = Never 767 (34.0 %) 8601 (37.0 %) <0.005
 Tobacco Use = Quit 1281 (56.7 %) 12118 (52.1 %) <0.0001
 Tobacco Use = Yes 193 (8.5 %) 2360 (10.1 %) <0.02
 Alcohol Use 705 (31.2 %) 8037 (34.6 %) <0.002
 Family History 37 (1.64 %) 442 (1.90 %) 0.4280
Laboratory Values    
 BUN 25.81 ± 14.27 17.45 ± 8.63 <0.0001
 AST 35.49 ± 29.02 27.79 ± 18.7 <0.0001
 Troponin 3.98 ± 3.13 1.31 ± 1.12 <0.0001
 Blood Bilirubin 0.77 ± 0.56 0.60 ± 0.37 <0.0001
 Platelet Count 214.33 ± 92.98 215.11 ± 85.71 0.686
 Heart Rate 84.2 ± 19.0 81.3 ± 18.7 <0.0001
 Temperature 98.2 ± 1.2 98.1 ± 1.6 0.08
 BP systolic 140 ± 32 138 ± 28 <0.01
 BP diastolic 72 ± 16 71 ± 14 <0.04
Medications    
 ACE Inhibitors 1219 (54.0 %) 10869 (46.7 %) <0.0001
 ARB 422 (18.7 %) 3851 (16.6 %) <0.02
 NSAIDS 821 (36.36 %) 8619 (37.05 %) 0.5312
 Lipid Lowering Drugs 1539 (68.16 %) 15233 (65.48 %) <0.02
 Diuretics 1750 (77.50 %) 13654 (58.69 %) <0.0001
 ACE Inhibitors or NSAIDS or Diuretics 2052 (90.88 %) 19111 (82.15 %) <0.0001
 ARB or ACE Inhibitors or NSAIDS or Diuretics 2076 (91.94 %) 19580 (84.17 %) <0.0001
 K Sparing 284 (12.58 %) 1786 (7.68 %) <0.0001
 Aminoglycoside Antibiotics 241 (10.67 %) 1986 (8.54 %) <0.001
 Radiocontrast Dyes 1536 (68.02 %) 14229 (61.17 %) <0.0001
 Cisplatin 31 (1.37 %) 267 (1.15 %) 0.3963
 Acyclovir 119 (5.27 %) 1170 (5.03 %) 0.6539
Comorbidities    
 Prior AKI 378 (16.74 %) 1470 (6.32 %) <0.0001
 Diabetes 223 (9.88 %) 1410 (6.06 %) <0.0001
 Hyperlipidemia 392 (17.36 %) 3127 (13.44 %) <0.0001
 Hypercalcemia 32 (1.417 %) 222 (0.95 %) <0.05
 Thrombocytopenia 103 (4.56 %) 567 (2.43 %) <0.0001
 Hypertension 453 (20.06 %) 3518 (15.12 %) <0.0001
 Heart Failure 272 (12.05 %) 1442 (6.20 %) <0.0001
 Coronary Artery Disease 250 (11.07 %) 1670 (7.18 %) <0.0001
 Disorders of Lipoid Metabolism 134 (5.93 %) 1413 (6.07 %) 0.8265
 Pancreatitis 51 (2.26 %) 342 (1.47 %) <0.005
 Rhabdomyolysis 19 (0.84 %) 164 (0.70 %) 0.5464
 Congestive Heart Failure 272 (12.04 %) 1442 (6.20 %) <0.0001
 Sepsis 230 (10.19 %) 1324 (5.69 %) <0.0001
 Respiratory Failure 363 (16.08 %) 1271 (5.46 %) <0.0001
  1. The p-values less than 0.05 are shown in bold