Table 5.
Multivariate analysis (linear regression) of the possible predictors (sociodemographic, clinical variables and context) of sleep-wake patterns with total sleep time, number of wakes, wake in percent, and minutes sleep at daytime as dependent variables (standardized beta, N = 106).
| Total sleep time (TST) | Wakes | Wake % of TST | Daytime sleep | |||||
|---|---|---|---|---|---|---|---|---|
| β | P | β | P | β | P | β | P | |
| Step 1. Sociodemographic | ||||||||
| Age | 0.19 | .18 | 0.15 | .30 | −0.03 | .85 | −0.02 | .99 |
| Sex (men as ref.) | 0.21 | .047 | −0.13 | .21 | −0.11 | .31 | 0.11 | .31 |
| Education (low, high) | 0.05 | .60 | 0.03 | .77 | −0.02 | .88 | 0.03 | .75 |
| Paired relationship (paired as ref.) | −0.09 | .41 | −0.12 | .24 | −0.06 | .56 | 0.08 | .44 |
| Work (paid work as ref.) | −0.05 | .74 | 0.04 | .78 | 0.01 | .96 | 0.07 | .60 |
| Explained variance (R2) | 7.2% | 5.7% | 0.7% | 3.6% | ||||
| Step 2. Clinical | ||||||||
| Physical functioning (SF-36–PF) | 0.02 | .89 | −0.06 | .56 | −0.08 | .47 | −0.08 | .49 |
| Sedatives | 0.00 | .99 | −0.01 | .95 | 0.14 | .19 | −0.08 | .47 |
| Time since admission (days) | 0.05 | .63 | −0.05 | .64 | −0.11 | .30 | 0.19 | .08 |
| Explained variance (R2) | 7.5% | 7.3% | 4.3% | 8.5% | ||||
| R2 change | 0.3% | 1.6% | 3.7% | 4.9% | ||||
| Step 3. Context | ||||||||
| Slept at home all nights (hospital as ref.) |
0.10 | .38 | −0.32 | .007 | −0.21 | .09 | −0.02 | .84 |
| Slept both at hospital and home (hospital as ref.) |
0.13 | .25 | −0.10 | .39 | −0.06 | .58 | −0.07 | .56 |
| Explained variance (R2) | 8.9% | 14.3% | 7.2% | 8.9% | ||||
| R2 change | 1.4% | 7.0% | 2.9% | 0.3% | ||||