Table 4.

Univariate and multivariate analysis of the variables associated with long-term renal survival

VariableUnivariate AnalysisMultivariate Analysis
HR (95% CI)P ValueHR (95% CI)P Value
Age1.01 (1.00 to 1.03)0.141.00 (0.98 to 1.01)0.66
Medical0.63 (0.41 to 0.97)0.041.13 (0.69 to 1.83)0.63
Kidney function at admission
 Normal11
 Preexisting CKD9.19 (5.34 to 15.82)<0.0011.82 (1.01 to 3.33)0.05
 No data available0.97 (0.49 to 1.95)0.940.49 (0.23 to 1.04)0.06
Admission diagnosis
 Sepsis0.54 (0.28 to 1.02)0.061.06 (0.54 to 2.08)0.88
 Thoracic surgery0.37 (0.19 to 0.72)0.0030.74 (0.34 to 1.62)0.46
 Other11
Class of eGFR
 ≥60 ml/min per 1.73 m211
 30–59 ml/min per 1.73 m23.18 (0.62 to 16.40)0.173.77 (0.72 to 19.77)0.12
 15–29 ml/min per 1.73 m227.19 (6.09 to 121.46)<0.00127.40 (5.79 to 129.60)<0.001
 <15 ml/min per 1.73 m2184.69 (43.32 to 787.37)<0.001176.96 (38.59 to 811.50)<0.001
Malignancy1.51 (0.86 to 2.65)0.151.56 (0.85 to 2.85)0.15
Cardiovascular disease0.87 (0.56 to 1.33)0.511.07 (0.65 to 1.78)0.79
Diabetes mellitus1.57 (0.98 to 2.52)0.060.85 (0.50 to 1.46)0.56
Hypertension3.09 (2.00 to 4.76)<0.0011.29 (0.78 to 2.15)0.32
Year of admission1.00 (0.95 to 1.05)0.980.98 (0.93 to 1.04)0.56
  • Variables tested in multivariate analysis: age, medical admission type, preexisting CKD, admission diagnosis sepsis, thoracic surgery or other, class of estimated GFR at discharge, malignancy, cardiovascular disease, diabetes mellitus, hypertension and year of admission. HR, hazard ratio; CI, confidence interval; eGFR, estimated GFR (categorical class at discharge, compared with eGFR ≥60 ml/min per 1.73 m2).