Table 6.
Short-Term Spectral Analysis in SIDS and Control Infants
| Future SIDS infants | Control infants | P Value | |
|---|---|---|---|
| Total Sleep | |||
| HF power, ms2 | 13.07 (5.06–98) | 31.64 (3.56–174.61) | <0.001 |
| HF normalized power, % | 6.25 (2.5–23.60) | 13.10 (2.45–54.50) | 0.002 |
| LF/HF power ratio, % | 8.99 (1.38–24.24) | 5.04 (0.71–18.82) | 0.005 |
| NREM sleep | |||
| HF power, ms2 | 10.63 (5.06–46.94) | 36.59 (3.56–167.68) | 0.006 |
| HF normalized power, % | 10.20 (5–17.3) | 21.75 (4.5–54.5) | 0.008 |
| LF/HF power ratio, % | 6.65 (2.06–13.98) | 1.96 (0.71–18.82) | 0.050 |
| REM sleep | |||
| HF power, ms2 | 14.09 (5.6–98) | 29.99 (11.91–174.61) | 0.027 |
| HF normalized power, % | 5.4 (2.5–23.6) | 7.68 (2.45–14.9) | NS |
| LF/HF power ratio, % | 9.53 (1.38–24.24) | 5.33 (2.52–17.44) | 0.046 |
The data are presented as median and range values. Statistical analyses were performed with Wilcoxon matched-paired test between sudden infant death syndrome (SIDS) cases and controls, P < 0.05.
NREM refers to non-rapid eye movement sleep; REM, rapid eye movement sleep; HF, high-frequency; LF, low-frequency.