Table 2 Main sleep characteristics of the patients in whom polysomnography could be accurately scored
From: Impact of earplugs and eye mask on sleep in critically ill patients: a prospective randomized study
Control group (n = 28) | Intervention group (n = 23) | p Value | |
|---|---|---|---|
Total sleep time per 18 ha, minutes | 301 (229–398) | 290 (146–410) | 0.91 |
Total sleep time during nighttimeb, minutes | 274 (177–329) | 286 (120–392) | 0.77 |
N1 Stage, minutes | 29 (17–59.5) | 29 (6–50) | 0.42 |
N2 Stage, minutes | 182 (102–229) | 146 (84–223) | 0.32 |
N3 Stage, minutes | 31 (7–69) | 58 (24–86) | 0.16 |
N3 stage, % of total sleep time | 11 [3–23] | 21 [7–28] | 0.09 |
REM sleep, minutes | 32 (6–48) | 35 (9–60) | 0.64 |
Sleep efficiencya, % per 18 h | 27 (21–38) | 26 (14–42) | 0.72 |
Short awakenings (<1 minute), n | 11 (5–20) | 8 (3–13) | 0.23 |
Prolonged awakenings (>1 minute), n | 31 (21–47) | 21 (19–26) | 0.02 |
Awakenings and arousals, n/TST | 26 (13–46) | 24 (15–29) | 0.39 |
Self-assessed sleep quality, VAS | 50 (32–70) | 50 (40–60) | 0.81 |