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Table 3 Linear spline associations between UO/FI and mortality

From: Fluid intake-related association between urine output and mortality in acute respiratory distress syndrome

VariablesCrude odds ratio (95% CI)PAdjusted odds ratio (95% CI)P
UO/FI ≤ 0.50.08 (0.03–0.22)<  0.0010.09 (0.03–0.25)<  0.001
UO/FI > 0.51.04 (0.95–1.13)0.3531.04 (0.96–1.14)0.281
Low tidal volume intervention  0.68 (0.51–0.92)0.013
Leukemia  3.56 (1.19–10.6)0.022
Solid tumour  3.38 (1.18–9.67)0.023
Respiratory rate  1.01 (1.00–1.03)0.013
Platelet count (10^9/L)  0.99 (0.99–0.99)0.027
PaO2/FiO2  0.99 (0.99–0.99)0.005
  1. Linear spline function was applied in the logistic models using cut-off value of 0.5 of UO/FI. The VIF value was 3.03 in the multivariable logistic model
  2. Abbreviation: UO/FI Urine output/fluid intake