Table 1.
Background Data for the Two Age Groups, and ANOVA Results for the Difference Between Groups
| Young Mean±SD |
Older Mean±SD |
F | P | |
|---|---|---|---|---|
| N | 42 | 42 | ||
| Age | 23.8±2.6 | 68.6±2.6 | ||
| BMI | 22.9±3.14 | 24.5±3.36 | 4.7 | 0.033 |
| Subjective health (1–7) | 4.58±0.54 | 4.67±0.54 | 0.5 | 0.463 |
| Women % | 52% | 47% | 0.2 | 0.850 |
| HADS anxiety | 3.02±2.5 | 1.33±1.4 | 13.3 | 0.001 |
| HADS depression | 1.20±1.37 | 1.14±0.99 | 0.1 | 0.750 |
| ISI | 10.6±2.1 | 9.1±1.6 | 13.9 | 0.001 |
| KSQ (1–6) | 5.26±0.42 | 5.23±0.50 | 0.1 | 0.798 |
| Enough sleep (1–6) | 4.11±0.74 | 4.56±0.50 | 9.4 | 0.003 |
| Sleep need (h) | 7.86±0.88 | 7.39±0.85 | 5.8 | 0.018 |
| Habitual sleep duration (h) | 8.53±1.30 | 8.22±1.30 | 1.1 | 0.290 |
| Recorded sleep (TST, h) | 6.61±1.30 | 7.16±1.40 | 6.05 | 0.017 |
Abbreviations: N, number of participants; KSQ, Karolinska Sleep Questionnaire; ISI, Insomnia Severity Scale (see below for details); HADS, Hospital Anxiety and Depression Scale; BMI, body mass index; TST, total sleep time (from polysomnography); h, hours; F, F-ratio; p, p-value for statistical significance.