Table 1.
Descriptive table of age and sleep
| Control | Sleep deprivation | Test statistics | |||
|---|---|---|---|---|---|
| N | Mean (SD) | N | Mean (SD) | ||
| Age (years) | |||||
| Women | 14 | 25.14 (3.48) | 12 | 22.75 (3.49) | t = 1.74 |
| Men | 17 | 22.00 (3.18) | 18 | 23.72 (3.06) | t = −1.63 |
| Total | 31 | 23.42 (3.63) | 30 | 23.33 (3.22) | t = 0.10 |
| Education (%) | χ2 = 3.12 | ||||
| Secondary school | 0 | 0.00% | 1 | 1.64% | |
| High school | 13 | 21.31% | 13 | 21.31% | |
| University < 2.5 years | 8 | 13.11% | 11 | 18.03% | |
| University > 3 years | 10 | 16.39% | 5 | 8.20% | |
| Habitual sleep (hh:mm) | |||||
| Work sleep time | 31 | 23:12 (00:50) | 30 | 23:29 (00:49) | t = −1.30 |
| Work wake time | 31 | 07:29 (01:02) | 30 | 07:40 (01:13) | t = −0.59 |
| Work sleep duration | 31 | 08:17 (00:59) | 30 | 08:11 (01:06) | t = 0.38 |
| Free sleep time | 31 | 00:02 (00:57) | 30 | 00:35 (01:01) | t = −2.16* |
| Free wake time | 31 | 08:44 (01:05) | 30 | 09:19 (00:56) | t = −2.24* |
| Free sleep duration | 31 | 08:41 (01:07) | 30 | 08:43 (00:59) | t = −0.14 |
| Actiwatch (assumed sleep) | |||||
| Nights 2 & 3 before | 29 | 07:50 (00:55) | 28 | 07:50 (00:56) | t = −0.03 |
| Night before | 29 | 07:53 (01:02) | – | – | – |
| Sleep measures | |||||
| ISI | 31 | 3.77 (2.59) | 30 | 3.30 (2.41) | t = 0.74 |
| KSQ sleepiness | 31 | 5.39 (0.47) | 30 | 5.38 (0.38) | t = 0.06 |
| ESS | 31 | 4.87 (2.51) | 30 | 5.53 (2.85) | t = −0.96 |
ESS, Epworth Sleepiness Scale; ISI: Insomnia Severity Index; KSQ: Karolinska Sleep Questionnaire.
Four participants were omitted from actigraphy analysis due to technical issues. Actiwatch assumed sleep: nights 2 & 3 before: mean of 2 nights prior to the night before the experiment.
*
p < 0.05.