- (1) age ≧18 years; (2) no history of neurological or psychiatric disorders; (3) ability of patients to communicate verbally and understand the sleep questionnaires administered in the ICU; (3) length of ICU stay ≥48 hours; (4) Glasgow coma score (GCS) >8 in the first to third day. Postoperative Extubation of MV within few hour (before the time of 9 pm for postoperative patients.