Table 1.
Demographic data. Continuous values are reported as means with standard deviations, unless otherwise indicated.
| Variables | Young | Old |
|---|---|---|
| Sample | ||
| Number of subjects | 47 | 39 |
| Demographics | ||
| Age (median, interquartile range) | 23.0 (21.5–25.0) | 68.0 (67.0–71.0) |
| Sex (females) | 24 (51.1%) | 20 (51.3%) |
| Body Mass Index | 22.9 (±3.1) | 24.7 (±3.4) |
| Education | ||
| Elementary school | 1 (2.1%) | 3 (7.7%) |
| High school | 10 (21.3%) | 17 (43.6%) |
| University degree | 6 (12.8%) | 18 (46.2%) |
| University student | 30 (63.8%) | 1 (2.6%) |
| Interpersonal reactivity index | ||
| Empathic concern | 3.9 (±0.6) | 3.9 (±0.4) |
| Fantasy | 3.4 (±0.7) | 2.9 (±0.6) |
| Perspective taking | 3.6 (±0.6) | 3.8 (±0.4) |
| Personal distress | 2.6 (±0.6) | 2.4 (±0.7) |
| HADS | ||
| Depression | 1.1 (±1.4) | 1.2 (±1.0) |
| Anxiety | 2.8 (±2.4) | 1.4 (±1.4) |
| Sleep | ||
| Insomnia severity index | 10.6 (±2.1) | 9.3 (±1.7) |
| Karolinska Sleepiness Scale, full sleep | 5.9 (±1.8) | 4.5 (±1.8) |
| Karolinska Sleepiness Scale, sleep restriction | 7.7 (±1.4) | 5.8 (±1.7) |
| Total sleep time (min), full sleep | 429.1 (±77.4) | 388.9 (±68.3) |
| Total sleep time (min), sleep restriction | 185.3 (±36.7) | 158.9 (±31.9) |
| REM sleep (min), full sleep | 86.8 (±29.9) | 74.9 (±35.6) |
| REM sleep (min), sleep restriction | 28.2 (±15.8) | 25.7 (±18.7) |
| Slow wave sleep (min), full sleep | 98.0 (±32.0) | 41.1 (±33.1) |
| Slow wave sleep (min), sleep restriction | 70.5 (±16.5) | 27.2 (±24.4) |
Categorical data are reported with percentages. Sleep measures are reported in minutes.