Table 1 |
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|
Comparison of groups defined by degree of alpha EEG intrusion into sleep1 |
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|
Percentage of sleep study with α-EEG activity |
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|
|
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|
0 – 40% |
40 – 60% |
60 – 100% |
|
|
(n = 9) |
(n = 14) |
(n = 8) |
|
|
Age (mean ± SD) |
36.8 ± 11.9 |
43.8 ± 8.6 |
45.4 ± 9.0 |
|
Female gender |
6 (66.6%) |
12 (85.7%) |
8 (100%) |
|
Clinical Diagnoses2 |
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|
Psychophysiological insomnia |
1 (11.1%) |
0 (0.0%) |
0 (0.0%) |
|
Non-organic insomnia |
2 (22.2%) |
3 (21.4%) |
2 (25.0%) |
|
Idiopathic hypersomnia |
2 (22.2%) |
0 (0.0%) |
0 (0.0%) |
|
Obstructive sleep apnea |
2 (22.2%) |
0 (0.0%) |
1 (12.5%) |
|
Periodic limb movement |
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|
Disorder/Restless legs syndrome |
2 (22.2%) |
5 (35.7%) |
3 (37.5%) |
|
Insomnia due to a mental disorder |
2 (22.2%) |
7 (50.0%) |
4 (50.0%) |
|
Fibromyalgia |
1 (11.1%) |
3 (21.4%) |
2 (25.0%) |
|
Medication |
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|
No medication |
6 (66.6%) |
9 (64.3%) |
4 (50.0%) |
|
Antidepressant |
1 (11.1%) |
2 (14.3%) |
2 (22.2%) |
|
Benzodiazepine |
0 (0.0%) |
1 (7.1%) |
0 (0.0%) |
|
Opiate |
1 (11.1%) |
2 (14.3%) |
0 (0.0%) |
|
|
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|
Other medication |
2 (22.2%) |
2 (28.6%) |
2 (25.0%) |
|
|
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|
1All between-group differences are non-significant by ANOVA (age) or Kruskal Wallis test (categorical variables). 2Co-morbidities result in total percentages > 100%. |
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|
Sloan et al. BioPsychoSocial Medicine 2007 1:20 doi:10.1186/1751-0759-1-20 |
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