Baseline characteristics and selected outcomes.

Abbreviations: UE: unplanned extubation; APACHE II, Acute Physiological and Chronic Health Evaluation II; CVC, central venous catheter; Glasgow Coma Scale: score measured 1–7 days before and nearest the unplanned extubation; VESTTM, a high frequency chest wall oscillator; NS, not significant.#Sedation use during this admission;*Some missing data.†After excluding 17 patients with hypoxic encephalopathy in the non-UE group, the difference in Glasgow coma scores between the two groups remained significant (10±3.2 versus 7.5±3.3, p Baseline characteristics and selected outcomes.