Table 1. Participant characteristics shown for the entire sample (n = 43) and separately for individuals recording no lapses on the PVT (n = 16) compared to individuals with a high number of lapses (4+, n = 16) two hours after waking.
Range | mean ± SD | No lapses | 4+ lapses | p* | |
---|---|---|---|---|---|
(mean ± SD) | (mean ± SD) | ||||
Gender | 22 M, 21 F | 5 M, 11 F | 10 M, 6 F | 0.077 | |
Age (years) | 18.4–31.0 | 22.53 ± 3.07 | 23.06 ± 3.67 | 22.40 ± 2.79 | NS |
Body Mass Index (kg/m2) | 18.7–30.5 | 22.34 ± 2.83 | 22.31 ± 2.66 | 21.93 ± 3.21 | NS |
Horne-Ostberg Questionnaire | 38–70 | 53.55 ± 7.45 | 54.97 ± 6.81 | 51.53 ± 6.73 | NS |
Sleep onset time (h) | 21:51–24:58 | 23:48 ± 00:55 | 23:34 ± 0:51 | 23:59 ± 0:59 | NS |
Dim Light Melatonin Onset (h) | 19:06–01:00 | 21:38 ± 01:23 | 20:52 ± 0:55 | 22:27 ± 1:33 | 0.001 |
Phase angle difference (dec h) | -0.31–4.14 | 2.16 ± 1.08 | 2.70 ± 0.83 | 1.54 ± 1.07 | 0.002 |
* Characteristics between groups were compared using Student’s t-test. Gender was compared using Chi-Squared test.