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Table 1 Clinical characteristics and respiratory parameters in study 1 patients

From: Sleep continuity: a new metric to quantify disrupted hypnograms in non-sedated intensive care unit patients

Characteristics NIV success NIV failure P value
number = 10 (62%) number = 6 (38%)
Age, years 79 (60 to 84) 84 (82 to 87) 0.1
Female, number (%) 3 (30%) 6 (100%)  
Known COPDa 7 (70%) 4 (67%)  
Known heart failurea 3 (30%) 4 (67%)  
SAPS II score (at admission) 41 (34 to 45) 39 (35 to 43) 0.9
pH 7.38 (7.35 to 7.41) 7.31 (7.30 to 7.31) 0.1
PO2/FiO2, mm Hg 269 (199 to 340) 340 (300 to 358) 0.3
PCO2, mm Hg 69 (46 to 70) 66 (62 to 77) 0.5
Bicarbonates, mmol/L 38 (29 to 40) 36 (31 to 41) 0.5
NIV duration prior PSG (hours) 12 (8 to 18) 17 (14 to 20) 0.4
  1. aKnown at admission. P values from the Mann–Whitney test. Values are given in median (25th to 75th percentiles). COPD: chronic obstructive pulmonary disease; NIV: non-invasive ventilation; PSG: polysomnography; SAPS: Simplified Acute Physiology Score.