Table 1.

Patient characteristics (recovery defined as creatinine within 25% of baseline)

All PatientsNo AKIAKIP of AKI versus No AKIAKI RecoveredAKI
Not RecoveredAKI
No SCr DrawnP of AKI Recovered versus Not Recovered
Demographics
 Number of participants (%)159,201 (100)155,090 (97.4)4,111 (2.6)2247 (54.7)984 (23.9)880 (21.4)
 Age, mean (SD)62.7 (18.1)62.7 (18.1)65.1 (16.6)<0.0166 (16.1)64.5 (16.9)63.3 (17.5)0.02
 Male sex (%)46.846.651.5<0.0153.049.350.30.05
Comorbid disease (%)
 Myocardial infarction22.222.028.9<0.0131.131.121.10.98
 Peripheral vascular disease15.215.122.5<0.0124.024.716.30.69
 Cerebrovascular disease20.820.822.9<0.0124.124.018.50.93
 Congestive heart failure26.426.043.1<0.0144.651.429.9<0.01
 Uncomplicated diabetes19.419.419.50.8519.517.921.40.27
  Complicated diabetes 12.312.025.9<0.0127.331.216.60.02
 Nondermatologic malignancy30.029.934.6<0.0135.138.229.30.09
 Mean CCI score (median, interquartile range)3.4 (3, 1–5)3.4 (3, 1–5)4.6 (4, 2–6)<0.014.9 (4, 2–7)5.2 (5, 3–7)3.5 (3, 1–5)<0.01
 CIHI resource intensity weight1.9 (3.2)1.8 (2.9)5.1 (8.7)<0.015.7 (9.9)5.8 (8.7)2.7 (3.6)0.71
Primary diagnostic code for hospitalization (%)
 Cardiovascular18.618.616.8<0.0116.621.212.3<0.01
 Respiratory6.76.78.2<0.018.95.98.9<0.01
 Gastrointestinal12.812.813.30.3512.711.716.50.43
 Infectious disease1.31.25.5<0.015.35.95.60.53
 Cancer10.911.09.0<0.018.710.38.10.16
 Orthopedics9.39.44.6<0.014.04.66.50.42
 Hematologic1.11.11.00.660.91.40.80.22
 Genitourinary6.36.017.0<0.0118.216.115.00.13
 Injury/poisoning7.98.06.2<0.017.14.95.50.02
 Other disease25.125.218.4<0.0117.418.121.00.66
Patients required acute dialysis during hospitalization (%)0.20.09.6<0.017.619.93.4<0.01
Baseline kidney function
 Serum creatinine (μmol/L) (mean, SD)90.4 (32.7)90 (31.6)105.4 (60.4)<0.01111.2 (62.8)105.1 (63.1)91 (47.4)0.01
 eGFR (ml/min per 1.73 m2) (mean, SD)74.3 (24.9)74.5 (24.8)68.5 (28.3)<0.0164.9 (27.0)70.3 (31.2)75.6 (26.7)<0.01
Categories
 >6071.171.559.1<0.0153.661.470.5<0.01
 45–6017.417.320.1<0.0122.216.718.8<0.01
 30–448.78.513.1<0.0115.112.98.20.10
 20–292.42.35.7<0.016.96.12.40.43
 15–190.40.42.0<0.012.22.90.20.22
  • CCI, Charlson Comorbidity Index; CIHI, Canadian Institute for Health Information.