Table 3.
Sleep diary
| Quality of sleep perioda | Degree of feeling resteda | Condition at awakeninga | |||||||
|---|---|---|---|---|---|---|---|---|---|
| OR | CI | p b | OR | CI | p b | OR | CI | p b | |
| ICUc | – | – – | – | 2.03 | (1.28; 3.22) | 0.003 | 2.35 | (1.40; 3.94) | 0.001 |
| Shift groupd | 0.57 | (0.36; 0.88) | 0.01 | – | – – | – | – | – – | – |
| Actual shift: eveninge | 0.80 | (0.42; 1.52) | 0.49 | 1.81 | (1.18; 2.77) | 0.006 | 1.73 | (1.13; 2.65) | 0.01 |
| Actual shift: nighte | 0.52 | (0.28; 0.96) | 0.04 | 0.95 | (0.61; 1.49) | 0.84 | 0.93 | (0.60; 1.46) | 0.76 |
| Actual shift: day offe | 0.56 | (0.33; 0.95) | 0.03 | 0.89 | (0.63; 1.25) | 0.50 | 0.78 | (0.56; 1.10) | 0.16 |
| Day shift (ICU)f | 0.71 | (0.36; 1.41) | 0.32 | – | – – | – | – | – – | – |
| Evening shift × ICUf | 1.51 | (0.77; 2.95) | 0.23 | – | – – | – | – | – – | – |
| Night shift × ICUf | 2.22 | (1.10; 4.46) | 0.03 | – | – – | – | – | – – | – |
| Day off × ICUf | 1.39 | (0.85; 2.28) | 0.19 | – | – – | – | – | – – | – |
| Duration of sleep | 0.97 | (0.88; 1.07) | 0.53 | 0.74 | (0.67; 0.82) | <0.001 | 0.78 | (0.71; 0.86) | <0.001 |
| BMI | 0.99 | (0.95; 1.04) | 0.78 | 0.99 | (0.94; 1.04) | 0.56 | 0.98 | (0.93; 1.03) | 0.35 |
| Age | 0.99 | (0.97; 1.01) | 0.32 | 0.98 | (0.96; 1.00) | 0.12 | 0.95 | (0.92; 0.98) | <0.001 |
| Seasonal variation 1g | 0.31 | (0.02; 4.96) | 0.41 | 0.07 | (0.00; 1.26) | 0.07 | 0.02 | (0.00; 0.11) | <0.001 |
| Seasonal variation 2h | 1.95 | (1.07; 3.57) | 0.03 | 1.07 | (0.54; 2.13) | 0.84 | 1.75 | (0.85; 3.61) | 0.13 |
Daily assessment of sleep
aQuality of sleep/degree of feeling rested (scored from 1 to 5), condition at awakening (scored from 1 to 9); each scale had 1 as the best level
bOrdinal logistic regression
cControl-ICU versus intervention-ICU. “–” Variable did not contribute significantly to the association
dNight shift group versus evening shift group
eActual shift (evening, night and day off) versus day shift
fInteraction between ICU and shift
gSine variation
hCosine variation