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. 2021 Jul 27;16(7):e0253778. doi: 10.1371/journal.pone.0253778

Fig 4. Cumulative frequency of observed sedation depth.

Fig 4

Graphical plot of the cumulative frequency of observed sedation depth and death in patients with moderate or severe COVID-19-related acute respiratory distress syndrome (ARDS) requiring mechanical ventilation. Sedation depth measured by Richmond Agitation Sedation Score (RASS) is graphically represented by coma (dark blue, RASS ≤ -3), arousable (blue, RASS = -2), or alert (light blue, RASS ≥ -1). Furthermore, leaving the observation period by death (in gray) or tracheostomy or extubation (white) is graphically represented.