Table 1.
Demographic and polysomnographic data for 10 critically ill neonates
| All Subjects N=10a |
|
|---|---|
| Gestational Age (weeks) | 39.0 ± 2.2 |
| Day of Life when Studied (median; range) | 4; 2–21 |
| Birth weight (kg) | 3.24 ± 0.72 |
| Total Recording Time (min) | 703 ± 57b |
| Wakefulness (% of Total Recording Time) | 15.3 ± 9.8 |
| Total Sleep Time (min) | 575 ± 68 |
| Quiet Sleep (% of Total Sleep Time) | 42.8 ± 11.2 |
| Active Sleep (% of Total Sleep Time) | 41.7 ± 8.4 |
| Indeterminate (% of Total Sleep Time) | 15.5 ± 5.9 |
| Sleep Efficiency (%)c | 82.7 ± 9.2 |
| Arousal Index (arousal/hour sleep) | 6.1 ± 3.4 |
| Apnea / Hypopnea index | 10.1 ± 7.0 |
| Quiet sleep Apnea / Hypopnea index | 3.9 ± 2.8 |
| Active sleep Apnea / Hypopnea index | 16.5 ± 10.1 |
| Mean %SpO2 during sleep | 97.2 ± 2.4 |
| Minimum % oxygen saturation during sleep | 80.9 ± 6.3 |
a
Unless otherwise indicated, data presented are mean ± standard deviation
b
Total recording time did not always equal sleep time + waking time, as epochs obscured by artifact were eliminated.
c
Sleep Efficiency = (Total Sleep Time / Total Recording Time) * 100.