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Table 4 Results of separate multiple linear regression models with ventilator-free days, ICU-free days, and specific organ failure-free days as the outcome variables and GDF-15 quartile as the predictor variable.

From: Growth differentiation factor-15 and prognosis in acute respiratory distress syndrome: a retrospective cohort study

  Quartile 2 Quartile 3 Quartile 4
  β* 95% CI P value β * 95% CI P value β * 95% CI P value
Ventilator-free days -2.91 -5.61,
-0.21
0.03 -5.27 -8.01,
-2.53
<0.01 -6.56 -9.38, -3.74 <0.01
ICU-free days -1.88 -4.39, 0.62 0.14 -5.25 -7.81,
-2.71
<0.01 -6.25 -8.87, -3.63 <0.01
Organ failure-free days          
Cardiovascular -0.85 -3.32, 1.61 0.50 -2.38 -4.87, 0.12 0.06 -6.03 -8.61, -3.45 <0.01
CNS -2.03 -4.78, 0.72 0.15 -5.66 -8.44,
-2.88
<0.01 -8.69 -11.56,
-5.81
<0.01
Coagulation -0.19 -2.60, 2.22 0.88 -3.03 -5.46,
-0.59
0.02 -7.49 -10.01,
-4.97
<0.01
Renal -0.45 -2.87, 1.98 0.72 -4.73 -7.18,
-2.27
<0.01 -10.0 -12.56,
-7.49
<0.01
Hepatic -0.01 -2.42, 2.41 0.99 -2.52 -4.96, -0.07 0.04 -8.49 -11.02,
-5.97
< 0.01
  1. Patients in GDF-15 quartile 1 served as the control group and, therefore, are not included in the table. *Parameter estimates shown are the difference when compared to patients in GDF-15 quartile 1 after adjusting for APACHE III score. CNS, central nervous system; 95% CI, 95% confidence interval.