Table 1.
Sleep, demographic, and clinical characteristics (frequency or mean ± standard deviation) of the sample (n = 35)
| Variable | Mean ± SD (or frequency) | |
|---|---|---|
| Sleep characteristics | ||
| Actigraphy | ||
| Sleep period (first two nights) | 539.64 (minutes) ± 59.96 | |
| Sleep period (third night) | 533.54 (minutes) ± 59.65 | |
| PSG | ||
| Sleep duration (third night, PSG data) | 523 (minutes) ± 54.69 | |
| Stage 1% | 3.45 ± 1.80 | |
| Stage 2% | 43.56 ± 7.03 | |
| Stage 3% | 13.19 ± 3.70 | |
| Stage 4% | 21.66 ± 5.54 | |
| REM % | 18.14 ± 3.28 | |
| Sleep efficiency | 95.88 ± .302 | |
| Oxygen saturation (minimum) | 94.3 ± 1.7 | |
| Oxygen saturation (mean) | 97.8 ± .62 | |
| PLM index | 1.83 ± 1.42 | |
| MES chronotype score | 31.06 ± 3.75 | |
| Demographic characteristics | ||
| Gender (male/female) | 20/15 | |
| Age | 8.6 ± 1.12 | |
| BMI | 18.44 ± 4.05 | |
| Ethnic background | ||
| Caucasian | 24 | |
| African | 1 | |
| Asian | 3 | |
| Multiethnic | 3 | |
| Unknown | 4 | |
| Clinical characteristics | ||
| IQ | 104.54 ± 17.99 | |
| CBCL score | 49.77 ± 9.2 | |
| CTRS-R cognitive problems/inattention | 48.46 ± 5.65 | |
| T score | ||
| CTRS-R hyperactivity-impulsivity T score | 48.32 ± 6.04 | |
Abbreviations: BMI, body mass index; CBCL, Child Behavior Checklist; CTRS-R, revised Conners Teacher Rating Scale; IQ, intelligence quotient; MES, Morningness– Eveningness Preferences Scale; PLM, periodic limb movement; PSG, polysomnography; REM, rapid eye movement; SD, standard deviation.