Table 1.
Descriptive statistics for demographic, sleepiness, fatigue, psychomotor performance, and actigraphically measured sleep variables (N = 79)
| - | Mean | SD | Range |
|---|---|---|---|
| Age (years) | 27.4 | 4.7 | 18.4 – 40.1 |
| Education (years) | 16.2 | 2.8 | 10 – 22 |
| White | 92.2% | – | – |
| Married/Living with partner | 87.3% | – | – |
| Primiparious | 69.6% | – | – |
| ESS Total Score | 8.2 | 4.0 | 0.1 – 22.4 |
| SSS | 3.1 | 1.0 | 1.4 – 6.0 |
| VAS | 49.2 | 17.3 | 5.8 – 86.0 |
| Median RT (ms.) | 391.9 | 75.6 | 234.0 – 657.0 |
| Lapse Frequency | 9.2 | 6.1 | 0.2 – 27.8 |
| POMS: ‘Vigor’ | 17.1 | 5.6 | 3.0 – 28.0 |
| POMS: ‘Fatigue’ | 7.8 | 4.3 | 0.0 – 18.0 |
| * Sleep Time (min) | 436.1 | 51.9 | 273.0 – 543.4 |
| * Sleep Efficiency (%) | 86.4 | 6.0 | 69.1 – 96.2 |
Note. Descriptive data for all variables except for demographic information were averaged within postpartum weeks 11.
Indicates actigraphically-measured values calculated from the identified nocturnal sleep period. Total sleep time = minutes calculated as sleep within the sleep period (time from sleep onset to final morning awakening). Sleep efficiency = minutes of sleep during the sleep period divided by the sleep period length [minutes], multiplied by 100. Two participants were missing actigraphy data, two participants were missing PVT data, and one participant was missing experience sampling method data. ESS: Epworth Sleepiness Scale; SSS: Stanford Sleepiness Scale; VAS: Visual Analogue of Fatigue Scale; RT: Reaction Time; POMS: Profile of Mood States.