Table 4

Association of RSI with healthcare resource utilisation

PredictorTotal cost, β (95% CI)*Inpatient length of stay, β (95% CI)†ICU admission, OR (95% CI)‡ICU length of stay, β (95% CI)†Mechanical ventilation, OR (95% CI)‡Utilisation of bronchoscopy, OR (95% CI)‡
Baseline RSI0.005 (−0.002 to 0.011)−0.003 (−0.008 to 0.003)1.03 (1.00 to 1.05)§0.006 (−0.026 to 0.038)1.01 (0.99 to 1.04)1.00 (0.98 to 1.02)
Peak RSI0.015 (0.012 to 0.019)¶0.003 (−0.001 to 0.007)1.08 (1.05 to 1.10)¶0.068 (0.050 to 0.086)¶1.08 (1.06 to 1.11)¶1.03 (1.01 to 1.04)**
Delta RSI0.017 (0.013 to 0.022)¶0.006 (0.002 to 0.010)**1.08 (1.05 to 1.10)¶0.064 (0.043 to 0.084)¶1.08 (1.06 to 1.11)¶1.03 (1.02 to 1.05)**
  • *Generalised linear model.

  • †Negative binomial regression.

  • ‡p<0.05.

  • §p<0.0001.

  • ¶p<0.001.

  • **logistic regression.

  • ICU, intensive care unit; RSI, Radiologic Severity Index.