Results

The incidence of ICU delirium was significantly lower among patients treated in the modified rooms (46%) compared to patients treated in the standard rooms (76%, p = 0.017) (Table 1).  The association between the modification of ICU environment and the delirium incidence was statistically significant  (odds ratio, 0.15; 95% confidence interval, 0.04 – 0.66; p = 0.012) after adjusting for covariates.

Conclusion

This study is the first to show that a modification in ICU environment is significantly associated with a reduced delirium incidence. Further analysis is needed to investigate which of the room interventions may contributed to this clinical effect.