Table 3.

Multivariable logistic regression analysis for hospital mortality

VariableAll Patients (n=49,518)Baseline Data Available (n=30,188)Hospital Length of Stay>7 d (n=30,273)
OR (95% CI)P ValueOR (95% CI)P ValueOR (95% CI)P Value
Renal function
 No kidney injury1.00 (reference)1.00 (reference)1.00 (reference)
 Sub-AKI5.44 (3.89 to 7.44)<0.0015.58 (3.63 to 8.31)<0.0013.62 (2.60 to 5.03)<0.001
 AKI 14.8 (13.2 to 16.7)<0.00115.4 (13.35 to 17.87)<0.00110.56 (9.26 to 12.03)<0.001
Age (1 yr)1.02 (1.02 to 1.02)<0.0011.02 (1.02 to 1.03)<0.0011.02 (1.01 to 1.02)<0.001
Male1.14 (1.00 to 1.29)0.0361.25 (1.07 to 1.46)0.0041.22 (1.06 to 1.40)0.003
Baseline creatinine 1.16 (1.06 to 1.26)0.0010.98 (0.87 to 1.09)0.801.08 (0.96 to 1.20)<0.16
ICU admission1.43 (1.19 to 1.71)<0.0010.76 (0.59 to 0.97)0.031.01 (0.83 to 1.22)0.91
Admission units
 Cardiology1.00 (reference)1.00 (reference)1.00 (reference)
 Emergency medicine2.93 (2.08 to 4.19)<0.0013.79 (2.50 to 5.92)<0.0012.46 (1.65 to 3.67)<0.001
 Gastroenterology4.09 (2.94 to 5.83)<0.0013.56 (2.37 to 5.52)<0.0013.62 (2.44 to 5.36)<0.001
 Endocrinology0.86 (0.47 to 1.50)0.601.00 (0.50 to 1.93)0.980.75 (0.40 to 1.42)0.39
 Nephrology0.36 (0.19 to 0.63)<0.0010.25 (0.10 to 0.53)<0.0010.34 (0.18 to 0.65)<0.001
 Neurology2.80 (1.63 to 4.72)<0.0012.4 (1.16 to 4.75)0.021.25 (0.65 to 2.42)0.49
 Oncology8.90 (6.36 to 12.7)<0.0015.89 (3.89 to 9.19)<0.0016.83 (4.58 to 10.17)<0.001
 Psychiatry0.50 (0.08 to 1.68)0.300.30 (0.01 to 1.49)0.160.27 (0.06 to 1.17)0.08
 Respiratory medicine10.5 (7.43 to 15.2)<0.0016.42 (4.18 to 10.12)<0.0017.61 (5.07 to 11.42)<0001
 Other2.05 (1.21 to 3.38)0.0071.64 (0.85 to 3.08)0.131.69 (0.97 to 2.92)0.06
 Cardiac surgery0.57 (0.28 to 1.07)0.080.71 (0.28 to 1.61)0.420.43 (0.20 to 0.94)0.03
 General surgery3.41 (2.45 to 4.84)<0.0013.14 (2.10 to 4.84)<0.0013.26 (2.20 to 4.81)<0.001
 Neurosurgery0.97 (0.54 to 1.69)0.971.41 (0.65 to 2.87)0.360.65 (0.33 to 1.28)0.65
 Obstetrics and  gynecology2.88 (1.95 to 4.29)<0.0013.28 (2.06 to 5.34)<0.0013.66 (2.34 to 5.73)<0.001
 Orthopedics0.32 (0.14 to 0.64)<0.0010.24 (0.08 to 0.58)<0.0010.26 (0.12 to 0.57)<0.001
 Otorhinolaryngology2.86 (1.88 to 4.38)<0.0012.87 (1.72 to 4.84)<0.0011.81 (1.11 to 2.94)0.02
 Thoracic surgery4.11 (2.55 to 6.58)<0.0014.92 (2.83 to 8.57)<0.0013.64 (2.13 to 6.23)<0.001
 Urology1.77 (1.22 to 2.60)0.0021.66 (1.06 to 2.67)0.021.69 (1.10 to 2.60)0.02
 Vascular surgery0.66 (0.42 to 1.05)0.080.86 (0.48 to 1.53)0.620.70 (0.41 to 1.19)0.19
 Other surgery1.49 (0.83 to 2.56)0.171.89 (0.94 to 3.61)0.061.27 (0.69 to 2.35)0.43
Hospital length of stay (1 d)1.00 (1.00 to 1.00)0.991.01 (1.00 to 1.02)<0.0011.00 (1.003 to 1.005)<0.001
  • The R2 values of the whole model are 0.26, 0.28, and 0.24, respectively, and the goodness-of-fit P value for all is 1.00. OR, odds ratio; 95% CI, 95% confidence interval.