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Table 2 Sleep parameters in patients with NIV success and NIV failure (study 1)

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

Parameters NIV Success (number = 10) NIV failure (number = 6) P value
TST (minutes) 423 (359 to 458) 328 (274 to 422) 0.3
Stage N1 (%) 16 (12 to 20) 17 (9 to 23) 0.6
Stage N2 (%) 45 (35 to 50) 61 (55 to 63) 0.2
Stage N3 (%) 12 (8 to 17) 13 (6 to 16) 0.6
REM (%) 11 (6 to 14) 3 (3 to 6) 0.1
Fragmentation (n/h) 27 (20 to 30) 36 (31 to 43) 0.1
  1. Fragmentation, number of arousals and awakenings per hour of sleep; values are median (25th to 75th percentiles). P values from the Mann–Whitney test. NIV: non-invasive ventilation; REM: rapid eye movement; TST: total sleep time.