Table 1.
Demographic and clinical features of participants with insomnia and controls
| Controls, n = 16 | Insomnia, n = 43 | p value | |
|---|---|---|---|
| Age (years) | 68.1 ± 9.2 | 65.2 ± 7.6 | 0.318b |
| Gender F (%) | 75% | 84% | 0.697c |
| BMI (kg/m2) | 26.0 ± 3.1 | 26.3 ± 3.9 | 0.815a |
| SBP (mmHg) | 128.6 ± 20.5 | 127.6 ± 11.9 | 0.918a |
| DBP (mmHg) | 74.0 ± 9.6 | 74.4 ± 9.1 | 0.739a |
| HR (bpm) | 69.5 ± 11.4 | 69.8 ± 7.8 | 0.867a |
| Average daily activity count (a.u.) | 278880.1 ± 73333.4 | 269323.9 ± 90010.9 | 0.732b |
| AHI | 3.8 ± 4.5 | 4.9 ± 4.4 | 0.426a |
| ESS | 6.1 ± 2.8 | 7.0 ± 4.2 | 0.425a |
| DLMO (h:min) | 19:50 ± 4:17 | 19:06 ± 4:06 | 0.560b |
Values are shown as mean ± SD. p values are obtained using (a) two-sided t-test; (b) nonparametric two-sided Wilcoxon rank-sum test; (c) chi-squared test.
AHI, apnea–hypopnea index at screening; BMI, body max index; DBP, diastolic blood pressure; DLMO, dim light melatonin onset was defined as clock time of plasma melatonin onset (2 standard deviations above baseline level); ESS, Epworth sleepiness scale administered upon admission to CRU; HR, heart rate; PSQI, Pittsburgh Sleep Quality Index; SBP, systolic blood pressure.