Figure 4From: Sleep continuity: a new metric to quantify disrupted hypnograms in non-sedated intensive care unit patientsClinical relevance of sleep continuity: sleep time spent in sleep bouts, short naps and long naps in patients with NIV success and NIV failure. Average sleep time (expressed as % of total sleep time) spent in sleep bouts lasting less than 10Â minutes, short naps (10 to 30Â minutes) and long naps (>30Â minutes) in the NIV failure group (gray boxes) and in NIV success patients (white boxes). Bottom and top of boxes are 25th and 75th percentiles, respectively, middle lines are median; lower and upper whiskers are 10th and 90th percentile, respectively; * P <0.05, Mann Whitney test between groups. NIV: non-invasive ventilation.Back to article page