Table 1 Screening characteristics
From: Does splitting sleep improve long-term memory in chronically sleep deprived adolescents?
Continuous sleep | Split sleep | t/χ2 | p | |||
|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | |||
n | 29 | – | 29 | – | – | – |
Age (years) | 16.58 | 1.12 | 16.55 | 0.74 | 0.12 | 0.907 |
Gender (number of males) | 15 | – | 15 | – | 0.04 | 0.998 |
Caffeinated drinks per day | 0.58 | 0.80 | 0.55 | 0.69 | 0.17 | 0.868 |
Body mass index | 21.25 | 3.46 | 20.67 | 2.80 | 0.69 | 0.491 |
Raven’s advanced progressive matrices score | 8.83 | 1.91 | 9.21 | 1.63 | −0.81 | 0.420 |
Beck anxiety inventory score | 9.34 | 6.68 | 10.38 | 6.30 | −0.61 | 0.546 |
Beck depression inventory score | 10.97 | 5.29 | 9.21 | 5.53 | 1.24 | 0.221 |
Morningness-eveningness questionnaire score | 48.97 | 7.54 | 50.72 | 7.07 | −0.92 | 0.364 |
Epworth sleepiness scale score | 8.21 | 3.43 | 7.86 | 3.78 | 0.36 | 0.717 |
Chronic sleep reduction questionnaire | ||||||
Total score | 35.24 | 5.96 | 36.10 | 4.66 | −0.61 | 0.542 |
Shortness of sleep | 12.72 | 2.09 | 13.03 | 2.04 | −0.57 | 0.569 |
Irritation | 6.38 | 1.52 | 6.76 | 1.90 | −0.84 | 0.405 |
Loss of energy | 8.48 | 2.05 | 8.03 | 2.01 | 0.84 | 0.403 |
Sleepiness | 7.66 | 2.27 | 8.28 | 1.51 | −1.23 | 0.226 |
Pittsburgh sleep quality index global score | 4.48 | 1.50 | 4.17 | 1.77 | 0.72 | 0.475 |
Actigraphy | ||||||
TIB on weekdays (h) | 7.00 | 0.77 | 6.84 | 1.13 | 0.63 | 0.530 |
TIB on weekends (h) | 8.45 | 1.13 | 8.15 | 1.05 | 1.07 | 0.291 |
TIB on average (h) | 7.42 | 0.63 | 7.22 | 0.91 | 0.98 | 0.329 |
TST on weekdays (h) | 5.51 | 0.75 | 5.50 | 0.89 | 0.02 | 0.988 |
TST on weekends (h) | 6.76 | 1.14 | 6.64 | 1.00 | 0.42 | 0.674 |
TST on average (h) | 5.86 | 0.68 | 5.83 | 0.73 | 0.20 | 0.845 |
Sleep efficiency (%) | 79.02 | 5.57 | 81.04 | 6.64 | −1.26 | 0.215 |
