Table 1

Patient clinical and demographic characteristics

Patient characteristicUsual care n=30Sleep protocol n=26
Age, years: mean±SD63.5±17.761.0±15.7
Non-white: n (%)8 (27%)5 (20%)
Women: n (%)17 (57%)17 (68%)
Full code: n (%)27 (90%)23 (92%)
APACHE II: mean±SD19.5±6.919.0±6.9
Admitted from ER: n (%)28 (93%)19 (79%)
Hours from hospital admission until enrollment:: mean±SD32.2±8.031.3±8.7
Hours from ICU admission until enrollment: mean±SD25.6±7.226.2±8.0
Delirious on enrolment: n (%)*14/27 (52%)9/20 (43%)
MICU admission, sepsis: n (%)10 (33%)3 (12%)
MICU admission, acute respiratory failure: n (%)7 (23%)7 (28%)
Vasopressors: n (%)11 (37%)3 (12%)
Mechanical ventilation: n (%)9 (30%)8 (32%)
MICU LOS, days: mean±SD4.3±3.44.1±2.9
Hospital LOS, days: mean±SD10.1±9.19.3±9.4
Death in hospital: n (%)4 (13%)2 (8%)
  • *A total of 47 of 56 patients able to be assessed for delirium.

  • APACHE II, Acute Physiology and Chronic Health Evaluation II; ER, emergency room; ICU, intensive care unit; LOS, length of stay; MICU, medical ICU.