Table 1.
Descriptive statistic of demographic, clinical and polysomnographic data.
| N | Insomnia disorders | Good sleepers | T | p |
|---|---|---|---|---|
| 12 (7 males) | 13 (8 males) | |||
| Age | 49.1 ± 7.6 | 41.3 ± 12.4 | 1.869 | 0.074 |
| BMI [kg/m2] | 22.5 ± 3.0 | 21.8 ± 2.5 | 0.624 | 0.538 |
| Education [y] | 9.9 ± 2.7 | 12.8 ± 4.1 | −2.078 | 0.052 |
| Insomnia duration [M] | 123.7 ± 57.6 | – | – | – |
| PSQI | 15.5 ± 2.8 | 3.9 ± 1.8 | 12.459 | < 0.001 |
| BIS | 37.4 ± 14.4 | 30.2 ± 9.2 | 1.513 | 0.144 |
| BIS-M | 36.5 ± 16.5 | 30.2 ± 12.5 | 1.078 | 0.292 |
| BIS-C | 36.9 ± 15.6 | 30.0 ± 11.5 | 1.265 | 0.219 |
| BIS-P | 39.0 ± 22.3 | 30.4 ± 11.8 | 1.187 | 0.252 |
| SDS | 55.0 ± 13.7 | 34.2 ± 6.7 | 4.760 | <0.001 |
| SAS | 51.3 ± 9.7 | 30.7 ± 3.7 | 6.896 | <0.001 |
| POLYSOMNOGRAPHIC DATA | ||||
| TST [min] | 399.6 ± 65.6 | 391.6 ± 71.4 | 0.291 | 0.774 |
| SEI [%] | 75.6 ± 14.6 | 84.8 ± 11.2 | −1.759 | 0.092 |
| SL [min] | 15.7 ± 9.3 | 11.6 ± 9.4 | 1.093 | 0.286 |
| WASO [min] | 112.3 ± 75.8 | 46.0 ± 40.0 | 2.701 | 0.016 |
| REML [min] | 156.0 ± 116.5 | 114.2 ± 63.0 | 1.103 | 0.286 |
| S1 [%] | 24.4 ± 13.7 | 18.6 ± 11.6 | 1.145 | 0.264 |
| S2 [%] | 54.6 ± 12.8 | 53.2 ± 12.9 | 0.264 | 0.794 |
| SWS [%] | 5.0 ± 4.4 | 9.6 ± 8.0 | −1.800 | 0.088 |
| REM [%] | 16.0 ± 8.0 | 18.7 ± 5.3 | −1.008 | 0.324 |
Significant results are presented in bold (p < 0.05). Marginally significant results are evidenced in italics. BMI, Body Mass Index; BIS, Barratt Impulsiveness Scale; BIS-M, the dimension of Motor Impulsiveness of BIS; BIS-C, the dimension of Cognitive Impulsiveness of BIS; BIS-P, the dimension of No Planning Impulsiveness of BIS; PSQI, Pittsburgh Sleep Quality Index; SAS, Self-Rating Anxiety Scale; SDS, Self-Rating Depression Scale; TST, Total Sleep Time; SEI, Sleep Efficiency Index; SL, Sleep Latency; WASO, Wake After Sleep Onset; REML, Rapid Eye Movement Latency; S1, Sleep Stage 1; S2, Sleep Stage 2; SWS, Slow Wave Sleep; REM, Rapid Eye Movement.